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Jan 17, 2011

Three-dimensional surface convection simulations of metal-poor stars …

Three-dimensional (3D) radiative hydrodynamic model atmospheres of metal-poor late-type stars are characterized by cooler upper photospheric layers t…
Feb 26, 2013

We considered statistical thermal fluctuations as a possible source for cosmological large scale structures. We presented a robust derivation of scalar and tensor spectra in this context. We also explicitly provided the formulas for the bi- and tris…

Cosmological perturbations from statistical thermal fluctuations

Cosmological perturbations due to statistical thermal fluctuations in a single fluid characterized by an arbitrary equation of state are computed. Fo…
Feb 19, 2015

SSALMON - The Solar Simulations for the Atacama Large Millimeter Ob…

The Solar Simulations for the Atacama Large Millimeter Observatory Network (SSALMON) was initiated in 2014 in connection with two ALMA development st…
Dec 02, 2015

Effects of Critical Collapse on Primordial Black-Hole Mass Spectra

Certain inflationary models as well as realisations of phase transitions in the early Universe predict the formation of primordial black holes. For m…
May 12, 2010

Fast Pixel Space Convolution for CMB Surveys with Asymmetric Beams an…

Precise measurement of the angular power spectrum of the Cosmic Microwave Background (CMB) temperature and polarization anisotropy can tightly constr…
Feb 12, 2018

On the occurrence of thermal non-equilibrium in coronal loops

Long-period EUV pulsations, recently discovered to be common in active regions, are understood to be the coronal manifestation of thermal non-equilib…
Apr 16, 2009

Bayesian analysis of white noise levels in the 5-year WMAP data

We develop a new Bayesian method for estimating white noise levels in CMB sky maps, and apply this algorithm to the 5-year WMAP data. We assume that …
Nov 30, 2016

Uncertainties in primordial black-hole constraints on the primordial …

The existence (and abundance) of primordial black holes (PBHs) is governed by the power spectrum of primordial perturbations generated during inflati…
Mar 05, 2018

Magnetic field variations associated with umbral flashes and penumbra…

Oscillations in sunspots are extensively studied phenomenon for last several decades. These studies mostly concentrate on variations in the intensity…
May 30, 2014

Questioning a 3.5 keV dark matter emission line

Context. Recent findings of line emission at 3.5 keV in both individual and stacked X-ray spectra of galaxy clusters have been speculated to have dar…
Jul 09, 2016

On the Misalignment between Chromospheric Features and the Magnetic …

Observations of the upper chromosphere shows an enormous amount of intricate fine structure. Much of this comes in the form of linear features which …
Sep 22, 2015

The Formation of IRIS Diagnostics. VII. The Formation of the OI 135.5…

The O I 135.56 nm line is covered by NASA's Interface Region Imaging Spectrograph (IRIS) small explorer mission which studies how the solar atmospher…
Aug 30, 2017

The Formation of IRIS Diagnostics. IX. The Formation of the C I 135.5…

The C I 135.58 line is located in the wavelength range of NASA's Interface Region Imagin Spectrograph (IRIS) small explorer mission. We here study th…
Nov 28, 2013

N-body lensed CMB maps: lensing extraction and characterization

We reconstruct shear maps and angular power spectra from simulated weakly lensed total intensity (TT) and polarised (EB) maps of the Cosmic Microwave…
Aug 18, 2015

The formation of IRIS diagnostics VI. The Diagnostic Potential of the…

We use 3D radiation magnetohydrodynamic models to investigate how the thermodynamic quantities in the simulation are encoded in observable quantities…
Jun 27, 2014

On the plasma flow inside magnetic tornadoes on the Sun

High-resolution observations with the Swedish 1-m Solar Telescope (SST) and the Solar Dynamics Observatory (SDO) reveal rotating magnetic field struc…
Apr 19, 2019

Chromospheric polarimetry through multi-line observations of the 850 …

We investigate the diagnostic potential of the spectral lines at 850 nm for understanding the magnetism of the lower atmosphere. For that purpose, we…
Aug 02, 2016

The cause of spatial structure in solar He I 1083 nm multiplet images

Context. The He i 1083 nm is a powerful diagnostic for inferring properties of the upper solar chromosphere, in particular for the magnetic field. Th…
Apr 21, 2008

Search for high velocities in the disk counterpart of type II spicules

Recently, De Pontieu et al. (2007b) discovered a class of spicules that evolves more rapidly than previously known spicules, with rapid apparent moti…
Oct 28, 2014

Cross-correlating 21cm intensity maps with Lyman Break Galaxies in th…

We investigate the cross-correlation between the spatial distribution of Lyman Break Galaxies (LBGs) and the 21cm intensity mapping signal at $z\sim[…
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