Fast and accurate predictions of the nonlinear matter power spectrum for general models of Dark Energy and Modified Gravity

nebblu/actio-reactio 3 Oct 2022

We embed linear and nonlinear parametrisations of beyond standard cosmological physics in the halo model reaction framework, providing a model-independent prescription for the nonlinear matter power spectrum.

Cosmology and Nongalactic Astrophysics

03 Oct 2022

HUXt -- An open source, computationally efficient reduced-physics solar wind model, written in Python

university-of-reading-space-science/huxt_frontiers_article 2 Oct 2022

The three key developments in v4. 0 are: a restructuring of the models solver to enable fully time-dependent boundary conditions, such that HUXt can in principle be initialised with in-situ observations from any of the fleet of heliospheric monitors; new functionality to trace streaklines through the HUXt flow solutions, which can be used to track features such as the Heliospheric Current Sheet; introduction of a small test-suite so that we can better ensure the reliability and reproducibility of HUXt simulations for all users across future versions.

Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics Plasma Physics Space Physics

02 Oct 2022

High Resolution HST Imaging Survey of Local Star-Forming Galaxies I: Spatially-Resolved Obscured Star Formation with H$α$ and Paschen-$β$ Recombination Lines

claragimenez/voronoi 30 Sep 2022

We present a sample of 24 local star-forming galaxies observed with broad- and narrow-band photometry from the Hubble Space Telescope, that are part of the GOALS survey of local luminous and ultra-luminous infrared galaxies.

Astrophysics of Galaxies

30 Sep 2022

A broad survey of spectro-temporal properties from FRB20121102A

mef51/surveyfrb20121102a 30 Sep 2022

We find from our sample of bursts from FRB20121102A a strong agreement with the inverse relationship between sub-burst slope and duration and with other predictions made by the triggered relativistic dynamical model (TRDM).

High Energy Astrophysical Phenomena

30 Sep 2022

Neutrino propagation in the Earth and emerging charged leptons with $\texttt{nuPyProp}$

NuSpaceSim/nupyprop 30 Sep 2022

The $\texttt{nuPyProp}$ outputs are lookup tables of charged lepton exit probabilities and energies that can be used directly or as inputs to the $\texttt{nuSpaceSim}$ code designed to simulate optical and radio signals from extensive air showers induced by the emerging charged leptons.

High Energy Astrophysical Phenomena High Energy Physics - Phenomenology

30 Sep 2022

Observations of a Magellanic Corona

deech08/hst_magellaniccorona 29 Sep 2022

The Large and Small Magellanic Clouds (LMC/SMC) are the closest major satellite galaxies of the Milky Way.

Astrophysics of Galaxies

29 Sep 2022

Improving Power Spectral Estimation using Multitapering: Precise asteroseismic modeling of stars, exoplanets, and beyond

aaryapatil/tapify 29 Sep 2022

We combine this multitaper method with the Non-Uniform Fast Fourier Transform (\texttt{mtNUFFT}) to more precisely estimate the frequencies of asteroseismic signals that are non-sinusoidal periodic (e. g., exoplanet transits) or quasi-periodic (e. g., pressure modes).

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

29 Sep 2022

Assessing Potential Contributions from Outgassing and Tidal Effects on the Evolving Rotational State of 1I/'Oumuamua

astertaylor/oumuamua 29 Sep 2022

It is feasible that tidal deformation contributed to the shorter timescale spin-down in October, while outgassing induced the secular spin-up.

Earth and Planetary Astrophysics

29 Sep 2022

LSST Survey Strategies and Brown Dwarf Parallaxes

jgizis/lsst-bd-cadence 29 Sep 2022

The Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) has the potential to measure parallaxes for thousands of nearby ultracool dwarfs, enabling improved measurements of the brown dwarf luminosity function.

Solar and Stellar Astrophysics Instrumentation and Methods for Astrophysics

29 Sep 2022

Radio source-component association for the LOFAR Two-metre Sky Survey with region-based convolutional neural networks

rafaelmostert/detectron2 28 Sep 2022

For large ($> 15$ arcsec) and bright ($> 10$ mJy) radio components in the LoTSS first data release, our model provides the same associations for $85. 3\%\pm0. 6$ of the cases as those derived when astronomers perform the association manually.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies

28 Sep 2022