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Development of New Analysis Method for Mapping Observations of Clusters of Galaxies

Published online by Cambridge University Press:  25 May 2016

K. Kikuchi ,
T. Ohashi ,
H. Ezawa ,
M. Hirayama ,
H. Honda  and
R. Shibata
K. Kikuchi
Affiliation:
Department of Physics, Tokyo Metropolitan University
T. Ohashi
Affiliation:
Department of Physics, Tokyo Metropolitan University
H. Ezawa
Affiliation:
Department of Physics, University of Tokyo
M. Hirayama
Affiliation:
Department of Physics, University of Tokyo
H. Honda
Affiliation:
Institute of Space and Astronautical Science
R. Shibata
Affiliation:
Institute of Space and Astronautical Science

Extract

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Mapping observations of nearby large-extended clusters of galaxies (Coma, Perseus, Virgo, etc.) are being performed with ASCA. Such clusters allow us to map physical parameters of hot gas in the clusters, such as temperature, metal abundance, and X-ray surface brightness. To determine such parameters at each part of a cluster, one should take careful care of X-ray contamination from outside of a pointed field, which is mainly due to “stray-light” X-rays (Honda et al. 1997). For this reason, the only way to obtain the distribution of hot gas parameter is to process the whole cluster data in a self-consistent way. For this purpose, we are developing the new analysis system called TERRA.

Type
Session 1: Plasma and Fresh Nucleosynthesis Phenomena
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 312 - 313
Copyright
Copyright © Kluwer 1998 

References

Ezawa, H., Fukazawa, Y., Makishima, K., Ohashi, T., Takahara, F., Xu, H., Yamasaki, Y.Y., (1997) ApJ Letters , Nov. 20 in press.Google Scholar
Honda, H., Hirayama, T., Watanabe, M., Kunieda, H., Tawara, Y, Yamashita, K., Ohashi, T., Hughes, J.P., Henry, J.P., (1997) ApJ , 473, L71.Google Scholar
Honda, H., Ezawa, H., Hirayama, M., Kikuchi, K., Ohashi, T., Watanabe, M., Kunieda, H., Tawara, Y, Yamashita, K., (1997) Proc. ASCA/ROSAT WORKSHOP ON CLUSTERS OF GALAXIES , p. 153.Google Scholar