Stress Testing $Λ$CDM with High-redshift Galaxy Candidates

no code yet • 2 Aug 2022

Early data from JWST have revealed a bevy of high-redshift galaxy candidates with unexpectedly high stellar masses.

Cosmology and Nongalactic Astrophysics Astrophysics of Galaxies

TWEETS

Schrodinger's Galaxy Candidate: Puzzlingly Luminous at $z\approx17$, or Dusty/Quenched at $z\approx5$?

no code yet • 4 Aug 2022

$JWST$'s first glimpse of the $z>10$ Universe has yielded a surprising abundance of luminous galaxy candidates.

Astrophysics of Galaxies

TWEETS

Constraining bosonic asymmetric dark matter with neutron star mass-radius measurements

no code yet • 5 Aug 2022

Neutron stars can capture asymmetric dark matter (ADM), which affects the neutron star's measurable properties and makes compact objects prime targets to search for ADM.

High Energy Astrophysical Phenomena High Energy Physics - Phenomenology Nuclear Theory

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A dusty starburst masquerading as an ultra-high redshift galaxy in JWST CEERS observations

no code yet • 3 Aug 2022

Due to the (redshifted) break produced by neutral hydrogen absorption of rest-frame UV photons, these sources are expected to drop out in the bluer filters like F150W and F200W while being well-detected in redder filters (e. g., F277W, F356W, F444W).

Astrophysics of Galaxies

TWEETS

JWST reveals a population of ultra-red, flattened disk galaxies at 2<z<6 previously missed by HST

no code yet • 2 Aug 2022

Here we report on a first view of starlight from a subset of the HST-dark population that are bright with JWST/NIRCam (4. 4$\mu$m<24. 5mag) and very faint or even invisible with HST ($<$1. 6$\mu$m).

Astrophysics of Galaxies

TWEETS

Streams on FIRE: Populations of Detectable Stellar Streams in the Milky Way and FIRE

no code yet • 3 Aug 2022

The number and stellar mass distributions of detectable stellar streams is consistent between observations and simulations.

Astrophysics of Galaxies

TWEETS

Quantifying the role of ram pressure stripping of galaxies within galaxy groups

no code yet • 2 Aug 2022

It is often stated that the removal of gas by ram pressure stripping of a galaxy disk is not a common process in galaxy groups.

Astrophysics of Galaxies

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Orbital dynamics landscape near the most distant known trans-Neptunian objects

3 Aug 2022

Nearly half (11) of these TNOs have orbits consistent with stable libration in Neptune's resonances; in particular, the orbits of TNOs 148209 and 474640 overlap with Neptune's 20:1 and 36:1 resonances, respectively.

Earth and Planetary Astrophysics

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The He I $λ$10830 $Å$ line as a probe of winds and accretion in young stars in Lupus and Upper Scorpius

no code yet • 5 Aug 2022

Overall, we observe variations in the proportion of each profile type and in the line properties which indicates and evolution of accretion and ejection signatures over time, and with source properties.

Solar and Stellar Astrophysics Astrophysics of Galaxies

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Decoding the giant extragalactic radio sources

no code yet • 3 Aug 2022

Giant radio sources (GRSs) defined to be > 0. 7 Mpc are the largest single objects in the Universe and can be associated with both galaxies (GRGs) and quasars (GRQs).

Astrophysics of Galaxies

TWEETS