Abstract
We report a systematic multiwavelength investigation of environments of the brightest cluster galaxies (BCGs), using the X-ray data from the Chandra archive, and optical images taken with 34 × 27 arcmin2 field-of-view Subaru Suprime-Cam. Our goal is to help understand the relationship between the BCGs and their host clusters, and between the BCGs and other galaxies, to eventually address a question of the formation and co-evolution of BCGs and the clusters. Our results include the following. (1) Morphological variety of BCGs, or the second or the third brightest galaxy (BCG2, BCG3), is comparable to that of other bright red sequence galaxies, suggesting that we have a continuous variation of morphology between BCGs, BCG2, and BCG3, rather than a sharp separation between the BCG and the rest of the bright galaxies. (2) The offset of the BCG position relative to the cluster centre is correlated to the degree of concentration of cluster X-ray morphology (Spearman ρ = -0.79), consistent with an interpretation that BCGs tend to be off-centred inside dynamically unsettled clusters. (3) Morphologically disturbed clusters tend to harbour the brighter BCGs, implying that the 'early collapse' may not be the only major mechanism to control the BCG formation and evolution.
| Original language | English |
|---|---|
| Pages (from-to) | 588-600 |
| Number of pages | 13 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 440 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 Apr |
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Keywords
- Clusters
- Evolution-X-rays
- Galaxies
- General-galaxies
ASJC Scopus subject areas
- Astronomy and Astrophysics
- Space and Planetary Science
Cite this
Multiwavelength investigations of co-evolution of bright cluster galaxies and their host clusters. / Hashimoto, Yasuhiro; Henry, J. Patrick; Boehringer, Hans.
In: Monthly Notices of the Royal Astronomical Society, Vol. 440, No. 1, 04.2014, p. 588-600.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Multiwavelength investigations of co-evolution of bright cluster galaxies and their host clusters
AU - Hashimoto, Yasuhiro
AU - Henry, J. Patrick
AU - Boehringer, Hans
PY - 2014/4
Y1 - 2014/4
N2 - We report a systematic multiwavelength investigation of environments of the brightest cluster galaxies (BCGs), using the X-ray data from the Chandra archive, and optical images taken with 34 × 27 arcmin2 field-of-view Subaru Suprime-Cam. Our goal is to help understand the relationship between the BCGs and their host clusters, and between the BCGs and other galaxies, to eventually address a question of the formation and co-evolution of BCGs and the clusters. Our results include the following. (1) Morphological variety of BCGs, or the second or the third brightest galaxy (BCG2, BCG3), is comparable to that of other bright red sequence galaxies, suggesting that we have a continuous variation of morphology between BCGs, BCG2, and BCG3, rather than a sharp separation between the BCG and the rest of the bright galaxies. (2) The offset of the BCG position relative to the cluster centre is correlated to the degree of concentration of cluster X-ray morphology (Spearman ρ = -0.79), consistent with an interpretation that BCGs tend to be off-centred inside dynamically unsettled clusters. (3) Morphologically disturbed clusters tend to harbour the brighter BCGs, implying that the 'early collapse' may not be the only major mechanism to control the BCG formation and evolution.
AB - We report a systematic multiwavelength investigation of environments of the brightest cluster galaxies (BCGs), using the X-ray data from the Chandra archive, and optical images taken with 34 × 27 arcmin2 field-of-view Subaru Suprime-Cam. Our goal is to help understand the relationship between the BCGs and their host clusters, and between the BCGs and other galaxies, to eventually address a question of the formation and co-evolution of BCGs and the clusters. Our results include the following. (1) Morphological variety of BCGs, or the second or the third brightest galaxy (BCG2, BCG3), is comparable to that of other bright red sequence galaxies, suggesting that we have a continuous variation of morphology between BCGs, BCG2, and BCG3, rather than a sharp separation between the BCG and the rest of the bright galaxies. (2) The offset of the BCG position relative to the cluster centre is correlated to the degree of concentration of cluster X-ray morphology (Spearman ρ = -0.79), consistent with an interpretation that BCGs tend to be off-centred inside dynamically unsettled clusters. (3) Morphologically disturbed clusters tend to harbour the brighter BCGs, implying that the 'early collapse' may not be the only major mechanism to control the BCG formation and evolution.
KW - Clusters
KW - Evolution-X-rays
KW - Galaxies
KW - General-galaxies
UR - http://www.scopus.com/inward/record.url?scp=84897502334&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84897502334&partnerID=8YFLogxK
U2 - 10.1093/mnras/stu311
DO - 10.1093/mnras/stu311
M3 - Article
AN - SCOPUS:84897502334
VL - 440
SP - 588
EP - 600
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 1
ER -