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Title: Group pre-processing versus cluster ram-pressure stripping: the case of ESO156−G029

Abstract

ABSTRACT We report on observations of ESO156−G029, member of a galaxy group which is positioned at the virial radius of cluster Abell 3193. ESO156−G029 is located ∼1.4 Mpc in projected distance from the brightest cluster galaxy NGC1500. We show that ESO156−G029 has disturbed gas kinematics and a highly asymmetric neutral hydrogen (H i) distribution, which are consequences of group pre-processing, and possibly of ram pressure. Based on the current data we propose a scenario in which ESO156−G029 had a minor gas-rich merger in the past and now starts to experience ram pressure. We infer that the galaxy will undergo rapid evolution once it gets closer to the cluster centre (less than 0.5 Mpc) where ram pressure is strong enough to begin stripping the H i from the galaxy.

Authors:
ORCiD logo [1];  [2];  [2];  [3]; ORCiD logo [2];  [4]
  1. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia
  2. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, PO Box 218, Hawthorn, VIC 3122, Australia, ARC Centre of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), Weston Creek, ACT 2611, Australia
  3. International Centre for Radio Astronomy Research, ICRAR M468, 35 Stirling Highway, Crawley, WA 6009, Australia
  4. Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027, USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1562741
Resource Type:
Published Article
Journal Name:
Monthly Notices of the Royal Astronomical Society: Letters
Additional Journal Information:
Journal Name: Monthly Notices of the Royal Astronomical Society: Letters Journal Volume: 490 Journal Issue: 1; Journal ID: ISSN 1745-3925
Publisher:
Oxford University Press
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Džudžar, Robert, Kilborn, Virginia, Murugeshan, Chandrashekar, Meurer, Gerhardt, Sweet, Sarah M., and Putman, Mary. Group pre-processing versus cluster ram-pressure stripping: the case of ESO156−G029. United Kingdom: N. p., 2019. Web. doi:10.1093/mnrasl/slz139.
Džudžar, Robert, Kilborn, Virginia, Murugeshan, Chandrashekar, Meurer, Gerhardt, Sweet, Sarah M., & Putman, Mary. Group pre-processing versus cluster ram-pressure stripping: the case of ESO156−G029. United Kingdom. doi:10.1093/mnrasl/slz139.
Džudžar, Robert, Kilborn, Virginia, Murugeshan, Chandrashekar, Meurer, Gerhardt, Sweet, Sarah M., and Putman, Mary. Sat . "Group pre-processing versus cluster ram-pressure stripping: the case of ESO156−G029". United Kingdom. doi:10.1093/mnrasl/slz139.
@article{osti_1562741,
title = {Group pre-processing versus cluster ram-pressure stripping: the case of ESO156−G029},
author = {Džudžar, Robert and Kilborn, Virginia and Murugeshan, Chandrashekar and Meurer, Gerhardt and Sweet, Sarah M. and Putman, Mary},
abstractNote = {ABSTRACT We report on observations of ESO156−G029, member of a galaxy group which is positioned at the virial radius of cluster Abell 3193. ESO156−G029 is located ∼1.4 Mpc in projected distance from the brightest cluster galaxy NGC1500. We show that ESO156−G029 has disturbed gas kinematics and a highly asymmetric neutral hydrogen (H i) distribution, which are consequences of group pre-processing, and possibly of ram pressure. Based on the current data we propose a scenario in which ESO156−G029 had a minor gas-rich merger in the past and now starts to experience ram pressure. We infer that the galaxy will undergo rapid evolution once it gets closer to the cluster centre (less than 0.5 Mpc) where ram pressure is strong enough to begin stripping the H i from the galaxy.},
doi = {10.1093/mnrasl/slz139},
journal = {Monthly Notices of the Royal Astronomical Society: Letters},
number = 1,
volume = 490,
place = {United Kingdom},
year = {2019},
month = {9}
}

Journal Article:
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This content will become publicly available on September 7, 2020
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