Butcher & Oemler cluster A 2111: A head-on merger at z = 0.23

Q. Daniel Wang; Melville P. Ulmer; Russell J. Lavery

doi:10.1093/mnras/288.3.702

Butcher & Oemler cluster A 2111: A head-on merger at z = 0.23

Q. Daniel Wang^*, Melville P. Ulmer, Russell J. Lavery

^*Corresponding author for this work

Physics and Astronomy

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

23 Scopus citations

Abstract

We present ROSAT PSPC and HRI observations of A 2111, the richest galaxy cluster photometrically surveyed by Butcher & Oemler. The cluster contains a distinct comet-shaped X-ray subcomponent that appears hotter than the rest of the cluster. The galaxy and X-ray surface brightness distributions of the cluster show a similarly elongated morphology. These results suggest that the cluster is undergoing a head-on subcluster merger. This merger may also be responsible for the high fraction of gas-rich blue galaxies observed in the cluster. We have further detected a poor cluster along the merging axis and at a projected distance of ∼ 5 Mpc from A2111.

Original language	English (US)
Pages (from-to)	702-714
Number of pages	13
Journal	Monthly Notices of the Royal Astronomical Society
Volume	288
Issue number	3
DOIs	https://doi.org/10.1093/mnras/288.3.702
State	Published - 1997

Keywords

Cosmology: observations
Galaxies: clusters: individual: A 2111
Galaxies: evolution
Large-scale structure of Universe
X-rays: general

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "Butcher & Oemler cluster A 2111: A head-on merger at z = 0.23",

abstract = "We present ROSAT PSPC and HRI observations of A 2111, the richest galaxy cluster photometrically surveyed by Butcher & Oemler. The cluster contains a distinct comet-shaped X-ray subcomponent that appears hotter than the rest of the cluster. The galaxy and X-ray surface brightness distributions of the cluster show a similarly elongated morphology. These results suggest that the cluster is undergoing a head-on subcluster merger. This merger may also be responsible for the high fraction of gas-rich blue galaxies observed in the cluster. We have further detected a poor cluster along the merging axis and at a projected distance of ∼ 5 Mpc from A2111.",

keywords = "Cosmology: observations, Galaxies: clusters: individual: A 2111, Galaxies: evolution, Large-scale structure of Universe, X-rays: general",

author = "{Daniel Wang}, Q. and Ulmer, {Melville P.} and Lavery, {Russell J.}",

year = "1997",

doi = "10.1093/mnras/288.3.702",

language = "English (US)",

volume = "288",

pages = "702--714",

journal = "Monthly Notices of the Royal Astronomical Society",

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TY - JOUR

T1 - Butcher & Oemler cluster A 2111

T2 - A head-on merger at z = 0.23

AU - Daniel Wang, Q.

AU - Ulmer, Melville P.

AU - Lavery, Russell J.

PY - 1997

Y1 - 1997

N2 - We present ROSAT PSPC and HRI observations of A 2111, the richest galaxy cluster photometrically surveyed by Butcher & Oemler. The cluster contains a distinct comet-shaped X-ray subcomponent that appears hotter than the rest of the cluster. The galaxy and X-ray surface brightness distributions of the cluster show a similarly elongated morphology. These results suggest that the cluster is undergoing a head-on subcluster merger. This merger may also be responsible for the high fraction of gas-rich blue galaxies observed in the cluster. We have further detected a poor cluster along the merging axis and at a projected distance of ∼ 5 Mpc from A2111.

AB - We present ROSAT PSPC and HRI observations of A 2111, the richest galaxy cluster photometrically surveyed by Butcher & Oemler. The cluster contains a distinct comet-shaped X-ray subcomponent that appears hotter than the rest of the cluster. The galaxy and X-ray surface brightness distributions of the cluster show a similarly elongated morphology. These results suggest that the cluster is undergoing a head-on subcluster merger. This merger may also be responsible for the high fraction of gas-rich blue galaxies observed in the cluster. We have further detected a poor cluster along the merging axis and at a projected distance of ∼ 5 Mpc from A2111.

KW - Cosmology: observations

KW - Galaxies: clusters: individual: A 2111

KW - Galaxies: evolution

KW - Large-scale structure of Universe

KW - X-rays: general

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JF - Monthly Notices of the Royal Astronomical Society

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Butcher & Oemler cluster A 2111: A head-on merger at z = 0.23

Abstract

Keywords

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