Intrinsic Alignment as an RSD Contaminant in the DESI Survey

cmlamman/ellipse_alignment 8 Sep 2022

We measure the tidal alignment of the major axes of Luminous Red Galaxies (LRGs) from the Legacy Imaging Survey and use it to infer the artificial redshift-space distortion signature that will arise from an orientation-dependent, surface-brightness selection in the Dark Energy Spectroscopic Instrument (DESI) survey.

Cosmology and Nongalactic Astrophysics

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A Sun-like star orbiting a black hole

no code yet • 14 Sep 2022

We identified the system as a black hole candidate via its astrometric orbital solution from the Gaia mission.

Solar and Stellar Astrophysics Astrophysics of Galaxies

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Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars

no code yet • 8 Sep 2022

Exoplanets smaller than Neptune are common around red dwarf stars (M dwarfs), with those that transit their host star constituting the bulk of known temperate worlds amenable for atmospheric characterization.

Earth and Planetary Astrophysics

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Deep diving off the `Cosmic Cliffs': previously hidden outflows in NGC 3324 revealed by JWST

no code yet • 3 Oct 2022

We also identify several Herbig-Haro (HH) objects in Pa-$\alpha$ images from JWST; most are confirmed as jets based on their proper motions measured in a comparison with previous Hubble Space Telescope (HST) H$\alpha$ images.

Astrophysics of Galaxies Solar and Stellar Astrophysics

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Non-detection of He I in the atmosphere of GJ1214b with Keck/NIRSPEC, at a time of minimal telluric contamination

no code yet • 7 Sep 2022

We used Keck/NIRSPEC to observe another transit of GJ 1214b at 10830 Angstroms, at a time of minimal contamination by telluric lines, and did not observe planetary helium absorption.

Earth and Planetary Astrophysics

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The Alcock-Paczyński effect from Lyman-$α$ forest correlations: Analysis validation with synthetic data

no code yet • 26 Sep 2022

In this work, we prepare for a cosmological analysis of the full shape of the Ly$\alpha$ forest correlations by studying synthetic data of the extended Baryon Oscillation Spectroscopic Survey (eBOSS).

Cosmology and Nongalactic Astrophysics

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Gaussian Process regression for astronomical time-series

dfm/araa-gps 19 Sep 2022

The last two decades have seen a major expansion in the availability, size, and precision of time-domain datasets in astronomy.

Instrumentation and Methods for Astrophysics

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New constraints on the expansion rate at redshift 2.3 from the Lyman-$α$ forest

andreicuceu/cobaya_likelihoods 28 Sep 2022

We measure the expansion rate of the Universe at redshift $z=2. 3$ from the anisotropy of Lyman-$\alpha$ (Ly$\alpha$) forest correlations measured by the Sloan Digital Sky Survey (SDSS).

Cosmology and Nongalactic Astrophysics

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Radiation protection and shielding materials for crewed missions on the surface of Mars

no code yet • 3 Oct 2022

Several widely used materials, along with some innovative ones and combinations of those, are studied for their behavior against Solar Energetic Particle Events and Galactic Cosmic Rays in the Martian environment.

Earth and Planetary Astrophysics Space Physics

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The JWST Hubble Sequence: The Rest-Frame Optical Evolution of Galaxy Structure at $1.5 < z < 8$

no code yet • 3 Oct 2022

We present results on the morphological and structural evolution of a total of 4265 galaxies observed with JWST at $1. 5 < z < 8$ in the JWST CEERS observations that overlap with the CANDELS EGS field.

Astrophysics of Galaxies

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