Molecular Gas Filaments and Fallback in the Ram Pressure Stripped Coma Spiral NGC 4921

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00552160" target="_blank" >RIV/67985815:_____/21:00552160 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3847/1538-4357/ac1793" target="_blank" >https://doi.org/10.3847/1538-4357/ac1793</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/ac1793" target="_blank" >10.3847/1538-4357/ac1793</a>

Result language

angličtina

Original language name

Molecular Gas Filaments and Fallback in the Ram Pressure Stripped Coma Spiral NGC 4921

Original language description

We investigate the effects of ram pressure on the molecular interstellar medium (ISM) in the disk of the Coma cluster galaxy NGC 4921 via high-resolution CO observations. We present 6 '' resolution CARMA CO(1-0) observations of the full disk, and 0.'' 4 resolution Atacama Large Millimeter/submillimeter Array CO(2-1) observations of the leading quadrant, where ram pressure is strongest. We find evidence for compression of the dense ISM on the leading side, spatially correlated with intense star formation activity in this zone. We also detect molecular gas along kiloparsec-scale filaments of dust extending into the otherwise gas stripped zone of the galaxy, seen in Hubble Space Telescope images. We find the filaments are connected kinematically as well as spatially to the main gas ridge located downstream, consistent with cloud decoupling inhibited by magnetic binding, and inconsistent with a simulated filament formed via simple ablation. Furthermore, we find several clouds of molecular gas similar to 1-3 kpc beyond the main ring of CO that have velocities that are blueshifted by up to 50 km s(-1) with respect to the rotation curve of the galaxy. These are some of the only clouds we detect that do not have any visible dust extinction associated with them, suggesting that they are located behind the galaxy disk midplane and are falling back toward the galaxy. Simulations have long predicted that some gas removed from the galaxy disk will fall back during ram pressure stripping. This may be the first clear observational evidence of gas re-accretion in a ram pressure stripped galaxy.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2021

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Volume of the periodical

921

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

20

Pages from-to

22

UT code for WoS article

000711651600001

EID of the result in the Scopus database

2-s2.0-85118847071