ALMA-JELLY. I. high resolution CO(2-1) observations of ongoing ram pressure stripping in NGC 4858 reveal asymmetrical gas tail formation and fallback

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00637539" target="_blank" >RIV/67985815:_____/25:00637539 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0368654" target="_blank" >https://hdl.handle.net/11104/0368654</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-4357/adde47" target="_blank" >10.3847/1538-4357/adde47</a>

Result language

angličtina

Original language name

ALMA-JELLY. I. high resolution CO(2-1) observations of ongoing ram pressure stripping in NGC 4858 reveal asymmetrical gas tail formation and fallback

Original language description

We present new CO(2-1) observations (resolution similar to 1 '' = 460 pc) of the Coma cluster jellyfish galaxy NGC 4858 obtained from the ALMA-JELLY large program. Analyzing this data alongside complimentary Subaru H alpha and Hubble Space Telescope (F600LP / F350LP) observations, we find numerous structural and kinematic features indicative of the effects from strong, inclined ram pressure, including an asymmetric inner gas tail. We estimate a highly inclined disk-wind angle of phi DW=75-27+10 . By subtracting a simple circular velocity model, we find (1): gas clumps that are being accelerated by ram pressure, and (2): signatures of gas clumps that had been previously pushed out of the disk but are now falling inward. We also discuss head-tail morphologies in star complexes within the stellar disk that appear to be ram pressure stripping (RPS)-influenced. Lastly, we compare this galaxy to state-of-the-art galaxy wind tunnel simulations. We find that this galaxy is one of the best nearby examples of strong and inclined ram pressure gas stripping, and of gas that is perturbed by ram pressure but not fully stripped and falls back. We emphasize the importance of torques due to ram pressure in highly inclined interactions, which help drive gas inward on the side rotating against the wind, contributing to the formation of asymmetric inner RPS tails.

Czech name

—

Czech description

—

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

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

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

988

Issue of the periodical within the volume

1

Country of publishing house

GB - UNITED KINGDOM

Number of pages

21

Pages from-to

72

UT code for WoS article

001529413900001

EID of the result in the Scopus database

2-s2.0-105011333149