Temperature map and iron abundance of the Ophiuchus cluster of galaxies

Manabu Watanabe, Koujun Yamashita, Akihiro Furuzawa, Hideyo Kunieda, Yuzuru Tawara

Research output: Contribution to journalArticle

20 Citations (Scopus)

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 languageEnglish
Pages (from-to)605-610
Number of pages6
JournalPublications of the Astronomical Society of Japan
Volume53
Issue number4
DOIs
Publication statusPublished - 01-01-2001

Fingerprint

galaxies
iron
brightness distribution
temperature
deconvolution
merger
distribution
coma
angular resolution
x rays

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Watanabe, Manabu ; Yamashita, Koujun ; Furuzawa, Akihiro ; Kunieda, Hideyo ; Tawara, Yuzuru. / Temperature map and iron abundance of the Ophiuchus cluster of galaxies. In: Publications of the Astronomical Society of Japan. 2001 ; Vol. 53, No. 4. pp. 605-610.
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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 journalArticle

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AU - Watanabe, Manabu

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