TY - JOUR
T1 - Temperature map and iron abundance of the Ophiuchus cluster of galaxies
AU - Watanabe, Manabu
AU - Yamashita, Koujun
AU - Furuzawa, Akihiro
AU - Kunieda, Hideyo
AU - Tawara, Yuzuru
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2001
Y1 - 2001
N2 - We present an X-ray surface-brightness distribution and a temperature map of the Ophiuchus cluster of galaxies observed by ASCA. The Ophiuchus cluster is a nearby rich cluster located at z = 0.028 having an angular extent of ∼1°. The observations were made by five pointings that cover the whole cluster. After deconvolution with the ASCA complex response function, we obtained the surface-brightness distribution with an angular resolution of 2′ and a temperature map with 8′ resolution. The X-ray surface-brightness distribution shows a nearly spherically symmetric distribution, except for a 15σ image excess at the position of 10′ to the north of the cluster center. On the other hand, a hot region with a temperature > 13keV is spread over a region of 20′ × 30′ at 20′ to the west of the cluster center. Because these characteristics are similar to those of the Coma cluster, we conclude this cluster has never relaxed dynamically, and is also recently experienced a merger.
AB - We present an X-ray surface-brightness distribution and a temperature map of the Ophiuchus cluster of galaxies observed by ASCA. The Ophiuchus cluster is a nearby rich cluster located at z = 0.028 having an angular extent of ∼1°. The observations were made by five pointings that cover the whole cluster. After deconvolution with the ASCA complex response function, we obtained the surface-brightness distribution with an angular resolution of 2′ and a temperature map with 8′ resolution. The X-ray surface-brightness distribution shows a nearly spherically symmetric distribution, except for a 15σ image excess at the position of 10′ to the north of the cluster center. On the other hand, a hot region with a temperature > 13keV is spread over a region of 20′ × 30′ at 20′ to the west of the cluster center. Because these characteristics are similar to those of the Coma cluster, we conclude this cluster has never relaxed dynamically, and is also recently experienced a merger.
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U2 - 10.1093/pasj/53.4.605
DO - 10.1093/pasj/53.4.605
M3 - Article
AN - SCOPUS:0035539422
VL - 53
SP - 605
EP - 610
JO - Publication of the Astronomical Society of Japan
JF - Publication of the Astronomical Society of Japan
SN - 0004-6264
IS - 4
ER -