Latest Research

SDSS-IV MaStar: Quantification and Abatement of Interstellar Absorption in the Largest Empirical Stellar Spectral Library

sdss/mangadap 13 Feb 2025

We show that interstellar absorption in simple stellar population (SSP) model spectra constructed from the original library artificially enhances $W$(CaII K) by $\gtrsim20\%$ at young ages ($<400$ Myr); dramatically enhances the strength of stellar NaI D in starbursting systems (by ${\gtrsim}50\%$); and enhances stellar NaI D in older stellar populations (${\gtrsim}10$ Gyr) by ${\gtrsim}10\%$.

Astrophysics of Galaxies

19
13 Feb 2025

Recovering the structure of debris disks non-parametrically from images

yinuohan/rave 12 Feb 2025

The updated algorithm allows for non-parametric recovery of the underlying (i. e., deconvolved) radial profile and vertical height of optically thin, axisymmetric disks imaged in either thermal emission or scattered light.

Earth and Planetary Astrophysics Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics

1
12 Feb 2025

On the long-term evolution of razor-thin galactic discs: Balescu-Lenard prediction and perspectives

MathieuRoule/mestel2d 11 Feb 2025

In the last five decades, numerical simulations have provided invaluable insights into the evolution of galactic discs over cosmic times.

Astrophysics of Galaxies

1
11 Feb 2025

Measuring the Distances to Asteroids from One Observatory in One Night with Upcoming All-Sky Telescopes

mf342/Maryann-et-al 11 Feb 2025

Our analysis indicates that distances to NEOs on the scale of $\sim0. 5$ AU can be constrained to below the percent level within a single night, depending on spacing of observations from one observatory.

Earth and Planetary Astrophysics

0
11 Feb 2025

Searching for Hot Water World Candidates with CHEOPS: Refining the radii and analysing the internal structures and atmospheric lifetimes of TOI-238 b and TOI-1685 b

newstrangeworlds/bear 11 Feb 2025

Planets in these Hot Water World triangles need to contain at least some heavier volatiles and are therefore interesting targets for atmospheric follow-up observations.

Earth and Planetary Astrophysics

8
11 Feb 2025

Searching for Inflationary Physics with the CMB Trispectrum: 3. Constraints from Planck

oliverphilcox/PolySpec 10 Feb 2025

Is there new physics hidden in the four-point function of the cosmic microwave background (CMB)?

Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory

12
10 Feb 2025

A fast and robust recipe for modeling non-ideal MHD effects in star-formation simulations

manosagian/non-ideal-mhd-approximate-code 10 Feb 2025

We perform a number of 2D axisymmetric 3-fluid non-ideal MHD simulations of collapsing prestellar cores and clouds with non-equilibrium chemistry and leverage upon previously-published results.

Astrophysics of Galaxies

0
10 Feb 2025

Solar flares as electron accelerators: toward a resolution of the acceleration efficiency issue

theMIDAgroup/STIX_VisibilityInversionSoftware 7 Feb 2025

A major open issue concerning the active Sun is the effectiveness with which magnetic reconnection accelerates electrons in flares.

Solar and Stellar Astrophysics High Energy Astrophysical Phenomena Space Physics 85-08

0
07 Feb 2025

Modelling the impact of circumbinary disk accretion on post-AGB binary evolution and surface chemistry

Kayla101197/MESA_Accreting_2.5Msun 7 Feb 2025

We find high accretion rates ($>\,$10$^{-7}$ M$_{\odot}$yr$^{-1}$) and large disk masses ($\geq\,$10$^{-2}$ M$_{\odot}$) necessary to reproduce observed depletion, particularly in higher-mass, hotter post-AGB stars (T$_{\textrm{eff}}\geq$ 6000 K).

Solar and Stellar Astrophysics

0
07 Feb 2025

Searching for Inflationary Physics with the CMB Trispectrum: 2. Code & Validation

oliverphilcox/PolySpec 7 Feb 2025

To unlock the vast potential of the CMB trispectrum, we require both robust estimators and efficient computational tools.

Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory

12
07 Feb 2025