Temperature map of the Coma Cluster of galaxies

M. Watanabe; K. Yamashita; A. Furuzawa; H. Kunieda; Y. Tawara; H. Honda

doi:10.1086/308084

Temperature map of the Coma Cluster of galaxies

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

Research output: Contribution to journal › Article › peer-review

40 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 language	English
Pages (from-to)	80-85
Number of pages	6
Journal	Astrophysical Journal
Volume	527
Issue number	1 PART 1
DOIs	https://doi.org/10.1086/308084
Publication status	Published - 10-12-1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1086/308084

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title = "Temperature map of the Coma Cluster of galaxies",

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.",

author = "M. Watanabe and K. Yamashita and A. Furuzawa and H. Kunieda and Y. Tawara and H. Honda",

year = "1999",

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doi = "10.1086/308084",

language = "English",

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T1 - Temperature map of the Coma Cluster of galaxies

AU - Watanabe, M.

AU - Yamashita, K.

AU - Furuzawa, A.

AU - Kunieda, H.

AU - Tawara, Y.

AU - Honda, H.

PY - 1999/12/10

Y1 - 1999/12/10

N2 - 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.

AB - 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.

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U2 - 10.1086/308084

DO - 10.1086/308084

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VL - 527

SP - 80

EP - 85

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1 PART 1

ER -

Temperature map of the Coma Cluster of galaxies

Abstract

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