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Now showing items 501-600 of 1297
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Numerical simulations of the solar chromosphere predict a diverse thermal structure with both hot and cool regions. Observations of plage regions in particular typically feature broader and brighter chromospheric ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Context. Long-period intensity pulsations were recently detected in the EUV emission of coronal loops and attributed to cycles of plasma evaporation and condensation driven by thermal non-equilibrium (TNE). Numerical ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Past X-ray observations of the nearby Seyfert 2 MCG-03-58-007 revealed the presence of a powerful and highly variable disk wind, where two possible phases outflowing with vout1/c ∼ −0.07 and vout2/c ∼ −0.2 were observed. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We consider the possibility that dark energy and baryons might scatter off each other. The type of interaction we consider leads to a pure momentum exchange, and does not affect the background evolution of the expansion ...
(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 / PublishedVersion; Peer reviewed, 2020)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We present a new code,SCALAR, based on the high-resolution hydrodynamics andN-body codeRAMSES, to solve the Schrödingerequation on adaptive refined meshes. The code is intended to be used to simulate axion ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
Weak lensing, which is the deflection of light by matter along the line of sight, has proven to be an efficient method for constraining models of structure formation and reveal the nature of dark energy. So far, most ...
(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, 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, 2020)
Context. The pursuit of more realistic spectroscopic modelling and consistent abundances has led us to begin a new series of papers designed to improve current solar and stellar abundances of various atomic species. To ...
(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, 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 interferometric observations of the CN(1–0) line emission in Mrk 231 and combine them with previous observations of CO and other H2 gas tracers to study the physical properties of the massive molecular outflow. ...
(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, 2022)
We present results from GigaEris, a cosmological, N-body hydrodynamical "zoom-in" simulation of the formation of a Milky Way-sized galaxy halo with unprecedented resolution, encompassing of order a billion particles within ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
It is always interesting to investigate how well can a future experiment perform with respect to others (present or future ones). Cosmology is really an exciting field where a lot of puzzles are still unknown. In this ...
(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, 2020)
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)
(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, 2020)
ABSTRACT
We perform a comprehensive analysis of the redshift evolution of the rest-UV spectra of star-forming galaxies out to z ∼ 5. We combine new z ∼ 5 measurements of H i Ly α and low- and high-ionization ...
(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 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 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)
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 / PublishedVersion; Peer reviewed, 2020)
We report new detections and limits from a NOEMA and ALMA CO(1-0) search for molecular outflows in 13 local galaxies with high far-infrared surface brightness, and combine these with local universe CO outflow results from ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
We derive constraints on the thermal and ionization states of the intergalactic medium (IGM) at redshift ≈ 9.1 using new upper limits on the 21-cm power spectrum measured by the LOFAR radio telescope and a prior on the ...
(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 ...
(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 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The solar photosphere and the outer layer of the Sun’s interior are characterized by convective motions, which display a chaotic and turbulent character. In this work, we evaluated the pseudo-Lyapunov exponents of the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We investigate potential gains in cosmological constraints from the combination of galaxy clustering and galaxy-galaxy lensing by optimizing the lens galaxy sample selection using information from Dark Energy Survey (DES) ...
(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 / 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. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
If a single line of sight (LOS) intercepts multiple dust clouds with different spectral energy distributions and magnetic field orientations, then the frequency scaling of each of the Stokes Q and U parameters of the thermal ...
(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 ...
(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 ...
(Doctoral thesis / Doktoravhandling, 2021)
Penumbral microjets (PMJs) are intriguing flashes of light found in the twilight region of sunspots, the penumbra, and they have typical lengths of hundreds of kilometres. Quite some finesse is required to tease out the ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present ultraviolet to near infrared spectroscopic observations of the quasar SDSS J001514+184212 and its proximate molecular absorber at z = 2.631. The [O III] emission line of the quasar is composed of a broad (FWHM ...
(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, 2021)
Context. Solar coronal loops are commonly subject to oscillations. Observations of coronal oscillations are used to infer physical properties of the coronal plasma using coronal seismology.
Aims. Excitation and evolution ...
(Master thesis / Masteroppgave, 2021)
The CO Mapping Array Pathfinder (COMAP) is an intensity mapping experiment targeting the emission from rotational lines of carbon monoxide, redshifted to the frequency range of 26-34 GHz. In this first phase of a planned ...
(Doctoral thesis / Doktoravhandling, 2023)
The oldest radiation in the universe is the Cosmic Microwave Background (CMB) radiation. Analysing the CMB is like analysing a baby picture of the Universe, and gives us unique information on what the Universe looked like ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We constrain the spectral index of polarized synchrotron emission, β s , by correlating the recently released 2.3 GHz S -Band Polarization All Sky Survey ( S -PASS) data with the 23 GHz 9-year Wilkinson Microwave Anisotropy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
The forward fitting of solar flare observations with radiation–hydrodynamic simulations is a common technique for learning about energy deposition and atmospheric evolution during these explosive events. ...
(Master thesis / Masteroppgave, 2021)
The CO Mapping Array Project (COMAP) is a line intensity mapping experiment currently in its Pathfinder phase, where it is targeting CO emissions at redshifts z=2.4-3.4. A main goal of the Pathfinder phase is to build a ...
(Master thesis / Masteroppgave, 2021)
Numerical modeling of neutron star cooling under full general relativity is treated with a new numerical framework in Python, capable of describing both neutron star structure and cooling for a given equation of state ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
Generative adversarial networks (GANs) have been recently applied as a novel emulation technique for large-scale structure simulations. Recent results show that GANs can be used as a fast and efficient ...
(Master thesis / Masteroppgave, 2021)
In this project we create a conversion tool for using numerical general relativity simulations done in Einstein Toolkit in the numerical relativity ray tracer tool General relativitY Orbit Tracer of Observatoire de ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
Thanks to the release of the extraordinary EHT image of shadow attributed to the M87* supermassive black hole (SMBH), we have a novel window to assess the validity of fundamental physics in the strong-field regime. Motivated ...
(Master thesis / Masteroppgave, 2021)
The ionized carbon [CII] λ ∼ 158 µm emission line is an important tool in tracing the interstellar medium (ISM) of galaxies, especially at high redshift. The line is one of the dominant coolants of cool gas and, as the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Routine ultraviolet imaging of the Sun’s upper atmosphere shows the spectacular manifestation of solar activity; yet, we remain blind to its main driver, the magnetic field. Here, we report unprecedented spectropolarimetric ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The importance of the chromosphere in the mass and energy transport within the solar atmosphere is now widely recognized. This review discusses the physics of magnetohydrodynamic waves and instabilities in large-scale ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. The study of the distribution, morphology, and kinematics of cold molecular gas in the nuclear and circumnuclear regions of active galactic nuclei (AGNs) helps to characterise and hence to quantify the impact of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. The physical conditions leading the sunspot penumbra decay are poorly understood so far.
Aims. We investigate the photospheric magnetic and velocity properties of a sunspot penumbra during the decay phase to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. Ellerman bombs (EBs) and UV bursts are small-scale reconnection events that occur in the region of the upper photosphere to the chromosphere. It has recently been discovered that these events can have emission ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We investigate cosmological signatures of the minimal theory of massive gravity (MTMG). To this aim, we simulate the normal branch of the MTMG by employing the R AMSES N -body code and extending it with an effective ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract Since the very beginning of astronomy the location of objects on the sky has been a fundamental observational quantity that has been taken for granted. While precise two dimensional positional information is easy ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Although thousands of galaxy mergers are known, only a handful of sub-kiloparsec-scale supermassive black hole (SMBH) pairs have been confirmed so far, leaving a huge gap between the observed and predicted numbers of such ...
Euclid: Constraining dark energy coupled to electromagnetism using astrophysical and laboratory data
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
In physically realistic, scalar-field-based dynamical dark energy models (including, e.g., quintessence), one naturally expects the scalar field to couple to the rest of the model’s degrees of freedom. In particular, a ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract The Interface Region Imaging Spectrograph (IRIS) has been obtaining near- and far-ultraviolet images and spectra of the solar atmosphere since July 2013. IRIS is the highest resolution observatory to provide ...
(Journal article / Tidsskriftartikkel / PublishedVersion, 2021)
We present the discovery of copious molecular gas in the halo of cid_346, a z = 2.2 quasar studied as part of the SINFONI survey for Unveiling the Physics and Effect of Radiative feedback (SUPER). New Atacama Compact Array ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Aims. We investigate the contribution of shot-noise and sample variance to uncertainties in the cosmological parameter constraints inferred from cluster number counts, in the context of the Euclid survey.
Methods. By ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)
Abstract This paper studies the cosmology of accelerating expansion of the universe in modified teleparallel gravity theory. We discuss the cosmology of f ( T, B ) gravity theory and its implication to the new general form ...
(Doctoral thesis / Doktoravhandling, 2023)
The study of the cosmic microwave background (CMB) radiation is a pillar of modern cosmology that enables us to understand the history, the evolution of structures, and the global shape (topology) of the Universe. This ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
Modelling uncertainties at small scales, i.e. high k in the power spectrum P(k), due to baryonic feedback, nonlinear structure growth and the fact that galaxies are biased tracers poses a significant obstacle to fully ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Aims. We aim to constrain the sizes of, and investigate deviations from spherical symmetry in, the CO circumstellar envelopes (CSEs) of 16 S-type stars, along with an additional 7 and 4 CSEs of C-type and M-type AGB stars, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The simplest ΛCDM model provides a good fit to a large span of cosmological data but harbors large areas of phenomenology and ignorance. With the improvement of the number and the accuracy of observations, discrepancies ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We present a new (2+1)D galaxy cluster finder based on photometric redshifts called Wavelet Z Photometric (WaZP) applied to DES first year (Y1A1) data. The results are compared to clusters detected by ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Elliptical (E) and spiral (S) galaxies follow tight, but different, scaling laws that link their stellar masses, radii, and characteristic velocities. Mass and velocity, for example, scale tightly in spirals with little ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Carbon monoxide (CO) is the most abundant molecule after molecular hydrogen and is important for the chemistry in circumstellar envelopes around evolved stars. When modelling the strength and shape of molecular lines, the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. Umbral flashes are sudden brightenings commonly visible in the core of some chromospheric lines. Theoretical and numerical modeling suggests that they are produced by the propagation of shock waves. According to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present constraints on the tensor-to-scalar ratio r using Planck data. We use the latest release of Planck maps, processed with the NPIPE code, which produces calibrated frequency maps in temperature and polarisation ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Non-Gaussian (NG) statistics of the thermal Sunyaev-Zeldovich (tSZ) effect carry significant information which is not contained in the power spectrum. Here, we perform a joint Fisher analysis of the tSZ power spectrum and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present the first joint analysis of cluster abundances and auto or cross-correlations of three cosmic tracer fields: galaxy density, weak gravitational lensing shear, and cluster density split by optical richness. From ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Feedback from active galactic nuclei (AGN) is thought to be key in shaping the life cycle of their host galaxies by regulating star-formation activity. Therefore, to understand the impact of AGN on star formation, it is ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. Spectroscopic observations of the emission lines formed in the solar transition region commonly show persistent downflows on the order of 10−15 km s −1 . The cause of such downflows, however, is still not fully ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present results from a high-resolution, cosmological, ΛCDM simulation of a group of field dwarf galaxies with the “superbubble” model for clustered SN feedback, accounting for thermal conduction and cold gas evaporation. ...
(Master thesis / Masteroppgave, 2021)
The large scale structure of the universe provides independent sets of experiments, in addition to established experiments such as CMB analysis and type Ia supernova, for extracting cosmological information. Due to redshift ...
(Doctoral thesis / Doktoravhandling, 2021)
The atmosphere of the Sun is envisioned as composed of inherently complex, non-homogeneous, and dynamic layers. A detailed understanding of the physical processes involved in these layers is still lacking. For example, it ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We demonstrate that highly accurate joint redshift–stellar mass probability distribution functions (PDFs) can be obtained using the Random Forest (RF) machine learning (ML) algorithm, even with few ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We perform a joint analysis of the counts of redMaPPer clusters selected from the Dark Energy Survey (DES) year 1 data and multiwavelength follow-up data collected within the 2500 deg2 South Pole Telescope (SPT) ...
(Master thesis / Masteroppgave, 2021)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Future ground-based telescopes will expand our capabilities for simultaneous multi-line polarimetric observations in a wide range of wavelengths, from the near-ultraviolet to the near-infrared. This creates a strong demand ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Aims. Estimates of coronal wave energy remain uncertain as a large fraction of the energy is likely hidden in the non-thermal line widths of emission lines. In order to estimate these wave energies, many previous studies ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. The magnetic Kelvin-Helmholtz instability (KHI) has been proposed as a means of generating magnetohydrodynamic turbulence and encouraging wave energy dissipation in the solar corona, particularly within transversely ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We perform a cross validation of the cluster catalogue selected by the red-sequence Matched-filter Probabilistic Percolation algorithm (redMaPPer) in Dark Energy Survey year 1 (DES-Y1) data by matching it with the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract The magnetic activity of the Sun directly impacts the Earth and human life. Likewise, other stars will have an impact on the habitability of planets orbiting these host stars. Although the magnetic field at the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Star-forming galaxies (SFGs) with stellar masses below 10 10 M ⊙ make up the bulk of the galaxy population at z > 2. The properties of the cold gas in these galaxies can only be probed in very deep observations or ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
Beyond ΛCDM, physics or systematic errors may cause subsets of a cosmological data set to appear inconsistent when analysed assuming ΛCDM. We present an application of internal consistency tests to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The National Science Foundation’s Daniel K. Inouye Solar Telescope (DKIST) will revolutionize our ability to measure, understand, and model the basic physical processes that control the structure and dynamics of the Sun ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
Oscillations in the solar atmosphere have long been observed both in quiet conditions and during solar flares. The chromosphere is known for its 3-min signals, which are strong over sunspot umbrae, and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We present the calibration of the Dark Energy Survey Year 3 (DES Y3) weak lensing (WL) source galaxy redshift distributions n(z) from clustering measurements. In particular, we cross-correlate the WL ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Motivated by the controversy over the surface metallicity of the Sun, we present a re-analysis of the solar photospheric oxygen (O) abundance. New atomic models of O and Ni are used to perform non-local thermodynamic ...