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Now showing items 901-1000 of 1306
(Master thesis / Masteroppgave, 2014)
The chromosphere is nearly translucent in the optical and infrared continuum, making it an elusive observational target. In this thesis, I use a CO5BOLD computational 3D radiation magnetohydrodynamics (MHD) model of the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Abstract
Ineke De Moortel, Isobel Falconer and Robert Stack explore the achievements and influence of Hannes Alfvén, in particular his seminal Monthly Notices paper of 1947 on the heating of the solar corona.
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aims. The Euclid space telescope will measure the shapes and redshifts of galaxies to reconstruct the expansion history of the Universe and the growth of cosmic structures. The estimation of the expected performance of the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Modelling the solar Transition Region with the use of an Adaptive Conduction (TRAC) method permits fast and accurate numerical solutions of the field-aligned hydrodynamic equations, capturing the enthalpy exchange between ...
(Doctoral thesis / Doktoravhandling, 2021)
The Sun is dynamic and influences the surrounding planetary system which becomes increasingly imperative to be able to predict as we increase the technology and space exploration. To this end, it is important to understand ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Observations at millimetre wavelengths provide a valuable tool to study the small-scale dynamics in the solar chromosphere. We evaluate the physical conditions of the atmosphere in the presence of a propagating shock wave ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Phase mixing of Alfvén waves has been studied extensively as a possible coronal heating mechanism but without the full thermodynamic consequences considered self-consistently. It has been argued that in some cases, ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
We report detection of oscillations in brightness temperature, size and horizontal velocity of three small bright features in the chromosphere of a plage/enhanced-network region. The observations, which were taken with ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
The instrumental advances made in this new era of 4 m class solar telescopes with unmatched spectropolarimetric accuracy and sensitivity will enable the study of chromospheric magnetic fields and their dynamics with ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aims. We investigate the formation of small scales and the related dissipation of magnetohydronamic (MHD) wave energy through non-linear interactions of counter-propagating, phase-mixed Alfvénic waves in a complex magnetic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
ABSTRACT
The study of the localized plasma conditions before the impulsive phase of a solar flare can help us understand the physical processes that occur leading up to the main flare energy release. Here, we ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present a final description of the data-processing pipeline for the Planck Low Frequency Instrument (LFI), implemented for the 2018 data release. Several improvements have been made with respect to the previous release, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The goal of the SunPy project is to facilitate and promote the use and development of community-led, free, and open source data analysis software for solar physics based on the scientific Python environment. The project ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
By direct measurements of the gas temperature, the Atacama Large Millimeter/submillimeter Array (ALMA) has yielded a new diagnostic tool to study the solar chromosphere. Here, we present an overview of the brightness-temperature ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. The relative importance of alternating current (AC) and direct current (DC) heating mechanisms in maintaining the temperature of the solar corona is not well constrained.
Aims. We aim to investigate the effects ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
There has been tremendous progress in the degree of realism of three-dimensional radiation magneto-hydrodynamic simulations of the solar atmosphere in the past decades. Four of the most frequently used numerical codes are ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Sunspots have played a key role in aiding our understanding of magnetohydrodynamic (MHD) wave phenomena in the Sun’s atmosphere, and it is well known they demonstrate a number of wave phenomena associated with slow MHD ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. The mechanism(s) behind coronal heating still elude(s) direct observation and modelling of viable theoretical processes and the subsequent effect on coronal structures is one of the key tools available to assess ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
WALOP (Wide-Area Linear Optical Polarimeter)-South, to be mounted on the 1m SAAO telescope in South Africa, is first of the two WALOP instruments currently under development for carrying out the PASIPHAE survey. Scheduled ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present measurements of the cosmic microwave background (CMB) lensing potential using the final Planck 2018 temperature and polarization data. Using polarization maps filtered to account for the noise anisotropy, we ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
The Cosmology Large Angular Scale Surveyor (CLASS) is an array of polarization-sensitive millimeter wave telescopes that observes ∼ 70% of the sky at frequency bands centered near 40 GHz, 90 GHz, 150 GHz, and 220 GHz from ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Observed FeO/MgO ratios in the Moon and Earth are inconsistent with simulations done with a single homogeneous silicate layer. In this paper we use a newly developed equation of state to perform smoothed particle hydrodynamics ...
(Master thesis / Masteroppgave, 2021)
The current paradigm of a 6 parameter ΛCDM cosmology with single field slow-roll inflation predicts a perfectly Gaussian and isotropic distribution for the Cosmic Microwave Background (CMB) temperature field. However, ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
The suitability of solar pores as magnetic wave guides has been a key topic of discussion in recent years. Here, we present observational evidence of propagating magnetohydrodynamic wave activity in a group of five ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data from the Planck Low Frequency Instrument (LFI) and High Frequency Instrument (HFI) using ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We present results derived from the analysis of spectropolarimetric measurements of active region AR12546, which represents one of the largest sunspots to have emerged onto the solar surface over the last 20 years. The ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aims. The SINFONI survey for Unveiling the Physics and Effect of Radiative feedback (SUPER) was designed to conduct a blind search for AGN-driven outflows on X-ray-selected AGNs at redshift z ∼ 2 with high (∼2 kpc) spatial ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aims. We investigate synthetic observational signatures generated from numerical models of transverse waves propagating in complex (braided) magnetic fields.
Methods. We consider two simulations with different levels ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
This paper presents the High Frequency Instrument (HFI) data processing procedures for the Planck 2018 release. Major improvements in mapmaking have been achieved since the previous Planck 2015 release, many of which were ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. In metric theories of gravity with photon number conservation, the luminosity and angular diameter distances are related via the Etherington relation, also known as the distance duality relation (DDR). A violation ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from the 2018 data release. The overall approach is similar in spirit to the one retained for the 2013 and 2015 data release, with a hybrid ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The study of polarized dust emission has become entwined with the analysis of the cosmic microwave background (CMB) polarization in the quest for the curl-like B -mode polarization from primordial gravitational waves and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Coronal mass ejections (CMEs) are often observed to be accompanied by flare, current sheets, and plasmoids/plasma blobs. 2D and 3D numerical simulations and observations reported plasmoids moving upward as well ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We review and compare two different cosmic microwave background (CMB) dipole estimators discussed in the literature and assess their performances through Monte Carlo simulations. The first method amounts to simple template ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present full-sky maps of the cosmic microwave background (CMB) and polarized synchrotron and thermal dust emission, derived from the third set of Planck frequency maps. These products have significantly lower contamination ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E -mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). We compare estimates obtained from separable ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
ABSTRACT
Analyses of Type Ia supernovae (SNe Ia) have found puzzling correlations between their standardized luminosities and host galaxy properties: SNe Ia in high-mass, passive hosts appear brighter than those ...
(Doctoral thesis / Doktoravhandling, 2021)
In the developing field of line intensity mapping (LIM), an approach to measuring the aggregate emission from various spectral lines in the early universe, as well as when searching for primordial B-modes in the Cosmic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Observations of the submillimetre emission from Galactic dust, in both total intensity I and polarization, have received tremendous interest thanks to the Planck full-sky maps. In this paper we make use of such full-sky ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Solar observations with the Atacama Large Millimeter/sub-millimeter Array (ALMA) facilitate studies of the atmosphere of the Sun at chromospheric heights at high spatial and temporal resolution at millimeter ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. The ESA Euclid space telescope could observe up to 150 000 asteroids as a side product of its primary cosmological mission. Asteroids appear as trailed sources, that is streaks, in the images. Owing to the survey ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We report on the implications for cosmic inflation of the 2018 release of the Planck cosmic microwave background (CMB) anisotropy measurements. The results are fully consistent with those reported using the data from the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We derive the equations of motion of dyonic black hole binaries with electric and magnetic charges and explore features of static orbits. By using a Newtonian method with the inclusion of radiation reaction, we calculate ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The European Space Agency’s Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We describe an extension of the most recent version of the Planck Catalogue of Compact Sources (PCCS2), produced using a new multi-band Bayesian Extraction and Estimation Package ( BeeP ). BeeP assumes that the compact ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
The magnetic and convective nature of the Sun's photosphere provides a unique platform from which generated waves can be modelled, observed, and interpreted across a wide breadth of spatial and temporal scales. As oscillations ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Analysis of the Planck 2018 data set indicates that the statistical properties of the cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using the 2013 and 2015 data ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. The chromosphere of the umbra of sunspots features an assortment of dynamic fine structures that are poorly understood and often studied separately. Small-scale umbral brightenings (SSUBs), umbral microjets, spikes ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Observational and theoretical evidence suggest that beams of accelerated particles are produced in flaring events of all sizes in the solar atmosphere, from X-class flares to nanoflares. Current models of these ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Past Suzaku, XMM–Newton, and NuSTAR observations of the nearby (z = 0.03233) bright Seyfert 2 galaxy MCG-03-58-007 revealed the presence of two deep and blue-shifted iron K-shell absorption line profiles. These could be ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The largest temperature anisotropy in the cosmic microwave background (CMB) is the dipole, which has been measured with increasing accuracy for more than three decades, particularly with the Planck satellite. The simplest ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
The coldest and densest structures of gas and dust in the Universe have unique spectral signatures across the (sub-)millimetre bands (υ ≈30 - 950 GHz). The current generation of single dish facilities has given a glimpse ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aims. The Spectral Imaging of the Coronal Environment (SPICE) instrument is a high-resolution imaging spectrometer operating at extreme ultraviolet wavelengths. In this paper, we present the concept, design, and pre-launch ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. To meet the scientific objectives of the mission, the Solar Orbiter spacecraft carries a suite of in-situ (IS) and remote sensing (RS) instruments designed for joint operations with inter-instrument communication ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Aims. We aim to investigate the temperature enhancements and formation heights of solar active-region brightenings such as Ellerman bombs (EBs), ultraviolet bursts (UVBs), and flaring active-region fibrils (FAFs) using ...
(Master thesis / Masteroppgave, 2022)
The Interface Region Imaging Spectrograph (IRIS) provides simultaneous imaging and spectral data of the chromosphere and transition region (TR) with great spatial, spectral and temporal resolution. A Solar coronal hole ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
ABSTRACT
Current post-processing techniques for the correction of atmospheric seeing in solar observations – such as Speckle interferometry and Phase Diversity methods – have limitations when it comes to their ...
(Master thesis / Masteroppgave, 2022)
Three-dimensional radiative transfer calculations involve extensive amounts of computation. These calculations are done on three-dimensional model atmospheres where the MHD equations are solved. Typically, model atmospheres ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The Einstein telescope and other third-generation interferometric detectors of gravitational waves are projected to be operational post 2030. The cosmological signatures of gravitational waves would undoubtedly shed light ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
We present a conceptual study of a large format imaging spectrograph for next-generation large (50-m class) single-dish telescopes, i.e., the Large Submillimeter Telescope (LST) and Atacama Large Aperture Submillimeter ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
At a fraction of the total cost of an equivalent orbital mission, scientific balloon-borne platforms, operating above 99.7% of the Earth’s atmosphere, offer attractive, competitive, and effective observational capabilities—namely, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present a publicly-available toolkit of flight-proven hardware and software to retrieve 5 TB of data or small physical samples from a stratospheric balloon platform. Before launch, a capsule is attached to the balloon, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Forthcoming large photometric surveys for cosmology require precise and accurate photometric redshift (photo- z ) measurements for the success of their main science objectives. However, to date, no method has been able to ...
(Master thesis / Masteroppgave, 2021)
Solar spicules are chromospheric jets of up-flowing plasma observed all over the Sun, and can be categorized into type i and type ii spicules. Type ii spicules are more dynamic and more ubiquitous, yet their origin and ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
In this paper we investigate how implementing machine learning could improve the efficiency of the search for Trans-Neptunian Objects (TNOs) within Dark Energy Survey (DES) data when used alongside orbit fitting. The ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
LiteBIRD, the Lite (Light) satellite for the study of B-mode polarization and Inflation from cosmic background Radiation Detection, is a space mission for primordial cosmology and fundamental physics. JAXA selected LiteBIRD ...
(Master thesis / Masteroppgave, 2022)
We made one-dimensional optical depth averages by averaging a Bifrost 3D model, and added four different microturbulence recipes to this average. Then we compared Ca~II 854.2 nm synthetic line profiles for these average ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Non-linear electrodynamics (NLED) theories are well-motivated extensions of QED in the strong field regime, and have long been studied in the search for regular black hole (BH) solutions. We consider two well-studied and ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Abstract Sunspots are the most prominent feature of the solar magnetism in the photosphere. Although they have been widely investigated in the past, their structure remains poorly understood. Indeed, due to limitations in ...
(Master thesis / Masteroppgave, 2022)
This thesis aims to revive the data gathered by the Diffuse Infrared Background Experiment (DIRBE) aboard the COsmic Background Explorer (COBE ) satellite, and, through modernizing this dataset, make it available for future ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
LiteBIRD has been selected as JAXA’s strategic large mission in the 2020s, to observe the cosmic microwave background (CMB) B-mode polarization over the full sky at large angular scales. The challenges of LiteBIRD are the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. Solar activity plays a quintessential role in affecting the interplanetary medium and space weather around Earth. Remote-sensing instruments on board heliophysics space missions provide a pool of information about ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
The magnetic field structure of sunspots above the photosphere remain poorly understood due to limitations in observations and the complexity of these atmospheric layers. In this regard, we studied the large isolated sunspot ...
(Master thesis / Masteroppgave, 2021)
Synthetic spectra calculated from model solar atmospheres are central to our understanding of the connection between the observed intensity and the solar atmosphere. To obtain synthetic profiles in the general case, we ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
LiteBIRD is a JAXA-led Strategic Large-Class mission designed to search for the existence of the primordial gravitational waves produced during the inflationary phase of the Universe, through the measurements of their ...
Dark Energy Survey Year 1 Results: Cosmological constraints from cluster abundances and weak lensing
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present a novel method of magnetohydrodynamics (MHD) within the smoothed particle hydrodynamics scheme (SPMHD) using the geometric density average force expression. Geometric density average within smoothed particle ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present the discovery of PSO J030947.49+271757.31, the radio brightest (23.7 mJy at 1.4 GHz) active galactic nucleus (AGN) at z > 6.0. It was selected by cross-matching the NRAO VLA Sky Survey and the Panoramic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present a new analytical equation of state (EOS), which correctly models high pressure theory and fits well to the experimental data of ɛ-Fe, SiO2, Mg2, and the Earth. The cold part of the EOS is modeled after the Varpoly ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present strong gravitational lensing models for 37 galaxy clusters from the Sloan Digital Sky Survey Giant Arcs Survey. We combine data from multi-band Hubble Space Telescope Wide Field Camera 3 (WFC3) imaging, with ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present ALMA Band 7 data of the[CII]lm157.74memission line and underlying far-IR(FIR)continuum for12 luminous quasars atz4.8powered by fast-growing supermassive black holes(SMBHs). Our totalsample consists of 18 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We report new galaxy clusters previously unknown included in the first Planck Sunyaev–Zeldovich (SZ) sources catalogue, the PSZ1. The results presented here were achieved during the second year of a two-year observational ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
We consider the inspiral of black holes carrying U(1) charge that is not electromagnetic, but corresponds to some dark sector. In the weak-field, low-velocity regime, the components follow Keplerian orbits. We investigate ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. High-speed downflows have been observed in the solar transition region (TR) and lower corona for many decades. Despite their abundance, it has been hard to find signatures of such downflows in the solar chromosphere. ...
(Master thesis / Masteroppgave, 2020)
We investigate the cosmological implications of a two-component dark matter superfluid as proposed by Ferreira et al. (2019). Through contact interactions between the axion-like particles in these components, a late-time ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. Ellerman bombs are regions with enhanced Balmer line wing emission and mark magnetic reconnection in the deep solar atmosphere in active regions and the quiet Sun. They are often found in regions where opposite ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is a suborbital rocket experiment that on 2015 September 3 measured the linear polarization produced by scattering processes in the hydrogen Lyα line of the solar ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Isotopologue line intensity ratios of circumstellar molecules have been widely used to trace the photospheric elemental isotopic ratios of evolved stars. However, depending on the molecular species and the physical ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Hot coronal jets are a basic observed feature of the solar atmosphere whose physical origin is still actively debated.
Aims. We study six recurrent jets that occurred in active region NOAA 12644 on April 4, 2017. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
The Interface Region Imaging Spectrograph (IRIS) is a NASA small explorer mission that provides high-resolution spectra and images of the Sun in the 133 – 141 nm and 278 – 283 nm wavelength bands. The IRIS data are archived ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2020)
Foreground components in the Cosmic Microwave Background (CMB) are sparse in a needlet representation, due to their specific morphological features (anisotropy, non-Gaussianity). This leads to the possibility of applying ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)
The origin of the disk and spheroid of galaxies has been a key open question in understanding their morphology. Using the high-resolution cosmological simulation New Horizon, we explore kinematically decomposed disk and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
On 2015 September 3, the Chromospheric Lyman-Alpha SpectroPolarimeter (CLASP) successfully measured the linear polarization produced by scattering processes in the hydrogen Lyα line of the solar disk radiation, revealing ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
We present an overview of high-resolution quiet Sun observations, from disk center to the limb, obtained with the Atacama Large millimeter and sub-millimeter Array (ALMA) at 3 mm. Seven quiet-Sun regions were observed at ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present a new, updated version of the EuclidEmulator (called EuclidEmulator2), a fast and accurate predictor for the nonlinear correction of the matter power spectrum. 2 per cent level accurate emulation is now supported ...