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

Robert Džudžar; Virginia Kilborn; Chandrashekar Murugeshan; Gerhardt Meurer; Sarah M. Sweet; Mary E. Putman

doi:10.1093/mnrasl/slz139

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

Robert Džudžar, Virginia Kilborn, Chandrashekar Murugeshan, Gerhardt Meurer, Sarah M. Sweet, Mary E. Putman

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

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.

Original language	English
Pages (from-to)	L6-L11
Number of pages	6
Journal	Monthly Notices of the Royal Astronomical Society
Volume	490
Issue number	1
DOIs	https://doi.org/10.1093/mnrasl/slz139
Publication status	Published - 7 Sept 2019
Externally published	Yes

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title = "Group pre-processing versus cluster ram-pressure stripping: the case of ESO156-G029",

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.",

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T1 - Group pre-processing versus cluster ram-pressure stripping: the case of ESO156-G029

AU - Džudžar, Robert

AU - Kilborn, Virginia

AU - Murugeshan, Chandrashekar

AU - Meurer, Gerhardt

AU - Sweet, Sarah M.

AU - Putman, Mary E.

PY - 2019/9/7

Y1 - 2019/9/7

N2 - 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.

AB - 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.

U2 - 10.1093/mnrasl/slz139

DO - 10.1093/mnrasl/slz139

M3 - Article

SN - 0035-8711

VL - 490

SP - L6-L11

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 1

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

Abstract

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