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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Using the Planck Low Frequency Instrument (LFI) and WMAP data within the global Bayesian B EYOND P LANCK framework, we constrained the polarized foreground emission between 30 and 70 GHz. We combined, for the first time, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
We present cosmological parameter constraints estimated using the Bayesian B EYOND P LANCK analysis framework. This method supports seamless end-to-end error propagation from raw time-ordered data onto final cosmological ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Context. The Extreme Ultraviolet Imager (EUI) on board Solar Orbiter consists of three telescopes: the two High Resolution Imagers, in EUV (HRI EUV ) and in Lyman- α (HRI Lya ), and the Full Sun Imager (FSI). Solar Orbiter/EUI ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Abstract
In most cosmological models, the equation of state of the dark matter is assumed to be zero, which means that the dark matter is pressure-less or cold. While this hypothesis is based on the abundance of ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Context. Erupting magnetic flux ropes (MFRs) are believed to play a crucial role in producing solar flares. However, the formation of erupting MFRs in complex coronal magnetic configurations and the role of their subsequent ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Context. Nanoflare-scale reconnection events are difficult to detect, and even when they are detected, it is tricky to reconstruct the details and trigger mechanisms that power them. However, numerical models of nanoflare-scale ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
We present a Bayesian calibration algorithm for cosmic microwave background (CMB) observations as implemented within the global end-to-end B EYOND P LANCK framework and applied to the Planck Low Frequency Instrument (LFI) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
The BeyondPlanck and Cosmoglobe collaborations have implemented the first integrated Bayesian end-to-end analysis pipeline for CMB experiments. The primary long-term motivation for this work is to develop a common analysis ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
ABSTRACT
Understanding the physical processes that trigger solar flares is paramount to help with forecasting space weather and mitigating the effects on our technological infrastructure. A previously unknown ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Abstract
Coronal mass ejections are explosive plasma phenomena prevalently occurring on the Sun and probably on other magnetically active stars. However, how their pre-eruptive configuration evolves toward the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
This work focusses on the pilot run of a simulation campaign aimed at investigating the spectroscopic capabilities of the Euclid Near-Infrared Spectrometer and Photometer (NISP), in terms of continuum and emission line ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
The kinematic and thermal Sunyaev-Zel’dovich (kSZ and tSZ) effects probe the abundance and thermodynamics of ionized gas in galaxies and clusters. We present a new hybrid estimator to measure the kSZ effect by combining ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
We have investigated the cosmological constraints that can be expected from measurement of the cross-correlation of galaxies with cosmic voids identified in the Euclid spectroscopic survey, which will include spectroscopic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Context. Optical polarimeters are typically calibrated using measurements of stars with known and stable polarization parameters. However, there is a lack of such stars available across the sky. Many of the currently ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Abstract
We perform a search for galaxy–galaxy strong lens systems using a convolutional neural network (CNN) applied to imaging data from the first public data release of the DECam Local Volume Exploration Survey, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
ABSTRACT
We present the first systematic follow-up of Planck Sunyaev–Zeldovich effect (SZE) selected candidates down to signal-to-noise (S/N) of 3 over the 5000 deg2 covered by the Dark Energy Survey. Using the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
LiteBIRD is a planned JAXA-led cosmic microwave background (CMB) B -mode satellite experiment aiming for launch in the late 2020s, with a primary goal of detecting the imprint of primordial inflationary gravitational waves. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
(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 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)
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 / 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 / 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)
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 / 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)
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)
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 ...
(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)
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 ...
(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 / 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)
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. 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 / PublishedVersion; Peer reviewed, 2020)
(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, 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 ...
(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)
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)
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 ...
(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, ...
(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 / 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 ...
(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 / PublishedVersion; Peer reviewed, 2020)
(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 / 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)
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 / 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 ...
(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 ...
(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 ...
(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)
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)
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 / 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 ...
(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 / 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, 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)
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 ...
(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 ...
(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 / 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, 2021)
The DMASS sample is a photometric sample from the DES Year 1 data set designed to replicate the properties of the CMASS sample from BOSS, in support of a joint analysis of DES and BOSS beyond the small overlapping area. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Recently, magnetic oscillations were detected in the chromosphere of a large sunspot and found to be linked to the coronal locations where a first ionization potential (FIP) effect was observed. In an attempt to shed light ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We present measurements of the radial profiles of the mass and galaxy number density around Sunyaev–Zel’dovich (SZ)-selected clusters using both weak lensing and galaxy counts. The clusters are selected ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
The analysis of current and future cosmological surveys of Type Ia supernovae (SNe Ia) at high redshift depends on the accurate photometric classification of the SN events detected. Generating realistic ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We investigate the influence of the chimney topology T×T×R of the Universe on the gravitational potential and force that are generated by point-like massive bodies. We obtain three distinct expressions for the solutions. ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We describe the Dark Energy Survey (DES) Deep Fields, a set of images and associated multiwavelength catalogue (ugrizJHKs) built from Dark Energy Camera (DECam) and Visible and Infrared Survey Telescope ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
The magnetorotational instability (MRI) is an important process in driving turbulence in sufficiently ionized accretion disks. It has been extensively studied using simulations with Eulerian grid codes, but remains fairly ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We use a sample of 809 photometrically classified Type Ia supernovae (SNe Ia) discovered by the Dark Energy Survey (DES) along with 40 415 field galaxies to calculate the rate of SNe Ia per galaxy in the redshift range 0.2 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We present in this paper one of the largest galaxy morphological classification catalogues to date, including over 20 million galaxies, using the Dark Energy Survey (DES) Year 3 data based on convolutional ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)
Waves and oscillations have been observed in the Sun’s atmosphere for over half a century. While such phenomena have readily been observed across the entire electromagnetic spectrum, spanning radio to gamma-ray sources, ...
(Master thesis / Masteroppgave, 2022)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
Future ground-based telescopes, such as the 4-metre class facilities DKIST and EST, will dramatically improve on current capabilities for simultaneous multi-line polarimetric observations in a wide range of wavelength ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
Quantifying tensions – inconsistencies amongst measurements of cosmological parameters by different experiments – has emerged as a crucial part of modern cosmological data analysis. Statistically significant ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We search for the signature of parity-violating physics in the cosmic microwave background, called cosmic birefringence, using the Planck data release 4. We initially find a birefringence angle of β=0.30°±0.11° (68% C.L.) ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Context. At present, an exponential growth in scientific data from current and upcoming solar observatories is expected. Most of the data consist of high spatial and temporal resolution cubes of Stokes profiles taken in ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We present the first linear polarization measurements from the 2015 long-duration balloon flight of Spider, which is an experiment that is designed to map the polarization of the cosmic microwave background (CMB) on degree ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The calibration and validation of scientific analysis in simulations is a fundamental tool to ensure unbiased and robust results in observational cosmology. In particular, mock galaxy catalogs are a crucial resource to ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We present DES14X2fna, a high-luminosity, fast-declining Type IIb supernova (SN IIb) at redshift z = 0.0453, detected by the Dark Energy Survey (DES). DES14X2fna is an unusual member of its class, with ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract As a frequent and energetic particle accelerator, our Sun provides us with an excellent astrophysical laboratory for understanding the fundamental process of particle acceleration. The exploitation of radiative ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Abstract This paper outlines the science case for line-intensity mapping with a space-borne instrument targeting the sub-millimeter (microwaves) to the far-infrared (FIR) wavelength range. Our goal is to observe and ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)
We report new Northern Extended Millimeter Array observations of the [C ii]158 μm, [N ii]205 μm, and [O i]146 μm atomic fine structure lines (FSLs) and dust continuum emission of J1148+5251, a z = 6.42 quasar, which probe ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We present a constraint on the tensor-to-scalar ratio, r, derived from measurements of cosmic microwave background (CMB) polarization B-modes with “delensing,” whereby the uncertainty on r contributed by the sample variance ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We present reconstructed convergence maps, mass maps, from the Dark Energy Survey (DES) third year (Y3) weak gravitational lensing data set. The mass maps are weighted projections of the density field ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
Determining the distribution of redshifts of galaxies observed by wide-field photometric experiments like the Dark Energy Survey (DES) is an essential component to mapping the matter density field with ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
In this paper, we present and validate the galaxy sample used for the analysis of the baryon acoustic oscillation (BAO) signal in the Dark Energy Survey (DES) Y3 data. The definition is based on a colour and redshift-dependent ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
Reverberation mapping is a robust method to measure the masses of supermassive black holes outside of the local Universe. Measurements of the radius–luminosity (R−L) relation using the Mg ii emission line are critical for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
The umbral regions of sunspots and pores in the solar photosphere are generally dominated by 3 mHz oscillations, which are due to p -modes penetrating the magnetic region. In these locations, wave power is also significantly ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)
The Wide-Area Linear Optical Polarimeter (WALOP)-South instrument will be mounted on the 1-m South African Astronomical Observatory telescope in South Africa as part of the Polar-Areas Stellar Imaging Polarization High ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
We describe and test the fiducial covariance matrix model for the combined two-point function analysis of the Dark Energy Survey Year 3 (DES-Y3) data set. Using a variety of new ansatzes for covariance modelling and testing, ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
ABSTRACT
We perform an analysis in harmonic space of the Dark Energy Survey Year 1 Data (DES-Y1) galaxy clustering photometric data using products obtained for the real-space analysis. We test our pipeline with ...