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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Astrophysical Journal

ISSN

0004-637X

e-ISSN

1538-4357

Svazek periodika

988

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

21

Strana od-do

72

Kód UT WoS článku

001529413900001

EID výsledku v databázi Scopus

2-s2.0-105011333149