Temperature map of the Coma Cluster of galaxies

M. Watanabe, K. Yamashita, Akihiro Furuzawa, H. Kunieda, Y. Tawara, H. Honda

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We present a temperature map of the Coma Cluster of galaxies with an angular resolution of 8′ corresponding to 320 kpc (H0 = 50 km s-1 Mpc-1) and an angular extent of 1°.5. The temperature was derived from the hardness ratio of two energy bands, 0.5-3 and 3-10 keV. The X-ray image in the 0.5 10 keV band was also deconvolved from the observed data with the angular resolution of 2′. We have refined the complex response function of the ASCA telescope, taking into account the off-axis angle and the energy of incident X-rays in this analysis. The temperature map indicates that a hot region (kT = 11-14 keV) is largely extended to the northwest 15′-40′ off from the cluster center, while a cool region (kT ∼ 5 keV) is 20′ off to the southeast. Another cool region is identified with the subcluster associated with the cD galaxy NGC 4839. These observational features can be interpreted in the context of the subcluster-cluster merging.

Original languageEnglish
Pages (from-to)80-85
Number of pages6
JournalAstrophysical Journal
Volume527
Issue number1 PART 1
Publication statusPublished - 10-12-1999
Externally publishedYes

Fingerprint

coma
galaxies
angular resolution
temperature
hardness
energy bands
energy
x rays
telescopes

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Watanabe, M., Yamashita, K., Furuzawa, A., Kunieda, H., Tawara, Y., & Honda, H. (1999). Temperature map of the Coma Cluster of galaxies. Astrophysical Journal, 527(1 PART 1), 80-85.
Watanabe, M. ; Yamashita, K. ; Furuzawa, Akihiro ; Kunieda, H. ; Tawara, Y. ; Honda, H. / Temperature map of the Coma Cluster of galaxies. In: Astrophysical Journal. 1999 ; Vol. 527, No. 1 PART 1. pp. 80-85.
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Watanabe, M, Yamashita, K, Furuzawa, A, Kunieda, H, Tawara, Y & Honda, H 1999, 'Temperature map of the Coma Cluster of galaxies', Astrophysical Journal, vol. 527, no. 1 PART 1, pp. 80-85.

Temperature map of the Coma Cluster of galaxies. / Watanabe, M.; Yamashita, K.; Furuzawa, Akihiro; Kunieda, H.; Tawara, Y.; Honda, H.

In: Astrophysical Journal, Vol. 527, No. 1 PART 1, 10.12.1999, p. 80-85.

Research output: Contribution to journalArticle

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AU - Honda, H.

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Watanabe M, Yamashita K, Furuzawa A, Kunieda H, Tawara Y, Honda H. Temperature map of the Coma Cluster of galaxies. Astrophysical Journal. 1999 Dec 10;527(1 PART 1):80-85.