Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 605-610 |
| Number of pages | 6 |
| Journal | Publications of the Astronomical Society of Japan |
| Volume | 53 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 01-01-2001 |
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All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science
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Temperature map and iron abundance of the Ophiuchus cluster of galaxies. / Watanabe, Manabu; Yamashita, Koujun; Furuzawa, Akihiro; Kunieda, Hideyo; Tawara, Yuzuru.
In: Publications of the Astronomical Society of Japan, Vol. 53, No. 4, 01.01.2001, p. 605-610.Research output: Contribution to journal › Article
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
PY - 2001/1/1
Y1 - 2001/1/1
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 -