Probing light relics through cosmic dawn

lesgourg/class_public 26 Sep 2023

We explore the prospects of upcoming 21-cm surveys of cosmic dawn ($12\lesssim \! z\lesssim\! 30$) to provide cosmological information on top of upcoming cosmic microwave background (CMB) and large-scale structure surveys, such as CMB-S4, Simons Observatory (SO) and DESI.

Cosmology and Nongalactic Astrophysics High Energy Physics - Phenomenology

0.02 stars / hour

Atmospheric Reconnaissance of TRAPPIST-1 b with JWST/NIRISS: Evidence for Strong Stellar Contamination in the Transmission Spectra

dfm/emcee 13 Sep 2023

The two transmission spectra show moderate to strong evidence of contamination from unocculted stellar heterogeneities, which dominates the signal in both visits.

Earth and Planetary Astrophysics Solar and Stellar Astrophysics

0.01 stars / hour

A Hitchhiker's Guide to Anomaly Detection with Astronomaly

MichelleLochner/astronomaly 25 Jan 2022

The next generation of telescopes such as the SKA and the Rubin Observatory will produce enormous data sets, requiring automated anomaly detection to enable scientific discovery.

Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies

0.01 stars / hour

LISA Detectability of a Stochastic Gravitational Wave Background from Unresolved White Dwarf Binaries in the LMC

sharanbngr/blip 23 Aug 2023

We present results of this analysis and show that the SGWB from DWDs in the LMC is potentially detectable by LISA.

Instrumentation and Methods for Astrophysics Astrophysics of Galaxies General Relativity and Quantum Cosmology

0.01 stars / hour

The buildup of galaxies and their spheroids: the contributions of mergers, disc instabilities and star formation

swiftsim/swiftsim 14 Jul 2022

Disc instabilities and their associated starbursts dominate for intermediate-mass spheroids ($10^{8. 5}<M_\mathrm{*, sph}<10^{11}$ M$_\odot$) at $z=0$.

Astrophysics of Galaxies

0.01 stars / hour

SISPO: Space Imaging Simulator for Proximity Operations

SISPO-developers/sispo 14 May 2021

This paper describes the architecture and demonstrates the capabilities of a newly developed, physically-based imaging simulator environment called SISPO, developed for small solar system body fly-by and terrestrial planet surface mission simulations.

Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Space Physics

0.01 stars / hour

Radio Galaxy Zoo EMU: Towards a Semantic Radio Galaxy Morphology Taxonomy

mb010/text2tag 14 Apr 2023

We collect 8, 486 plain English annotations of radio galaxy morphology, from which we derive a taxonomy of tags.

Astrophysics of Galaxies Instrumentation and Methods for Astrophysics

0.01 stars / hour

Accelerating spherical harmonic transforms for a large number of sky maps

liuhao-cn/fastsht 22 Aug 2022

The spherical harmonic transform is a powerful tool in the analysis of spherical data sets, such as the cosmic microwave background data.

Instrumentation and Methods for Astrophysics Cosmology and Nongalactic Astrophysics

0.01 stars / hour

Energy spectra of secondaries in proton-proton interactions

aafragpy/aafragpy 1 Oct 2021

We compare the predictions of AAfrag for the spectra of secondary photons, neutrinos, electrons, and positrons produced in proton-proton collisions to those of the parameterisations of Kamae et al., Kelner et al., and Kafexhiu et al. We find that the differences in the normalisation of the photon energy spectra reach 20$-$50% at intermediate values of the transferred energy fraction $x$, growing up to a factor of two for $x\rightarrow\,$1, while the differences in the neutrino spectra are even larger.

High Energy Astrophysical Phenomena High Energy Physics - Phenomenology

0.01 stars / hour

Fast gravitational wave parameter estimation without compromises

kazewong/jim 8 Feb 2023

We present a lightweight, flexible, and high-performance framework for inferring the properties of gravitational-wave events.

Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology

0.01 stars / hour