2001年9月13日木曜日

XMM-Newton observations of the cluster of galaxies Abell 496

Accepted on A&A in 2001

abstract
The results from XMM-Newton observations of the relaxed cluster of galaxies Abell 496 are presented. The spatially-resolved X-ray spectra taken by the European Photon Imaging Cameras show a temperature drop and a Fe abundance increase in the intra-cluster medium (ICM) towards the cD galaxy at the cluster center. The abundances of Si and S also show a central enhancement. High resolution soft X-ray spectra obtained with the Reflection Grating Spectrometers provides a strong constraint on the temperature structure in the central cool plasma. Furthermore, the O abundance at the cluster core is accurately measured based on the O VIII ${\rm Ly\alpha}$ line detected with the RGS. Contrary to the Si, S, and Fe abundances, the O abundance is radially constant over the cluster.

Key words: galaxies: clusters: individual: Abell 496 - galaxies: clusters: general - galaxies: abundances - X-rays: galaxies: clusters

2001年1月26日金曜日

X-Ray Probing of the Central Regions of Clusters of Galaxies

Makishima, Kazuo; Ezawa, Hajime; Fukuzawa, Yasushi; Honda, Hirohiko; Ikebe, Yasushi; Kamae, Tuneyoshi; Kikuchi, Ken'ich; Matsushita, Kyoko; Nakazawa, Kazuhiro; Ohashi, Takaya, et al.
日本天文学会欧文研究報告論文賞受賞
2006年度

http://adsabs.harvard.edu/abs/2001PASJ...53..401M