Abstract
We present the ASCA results of spatially resolved X-ray spectra in the central regions of the Virgo cluster, near to the central elliptical galaxy M 87 and 40′ northwest of M 87 (M 87 NW). Since the spectra of the M 87 region is complex, an adequate fit requires at least two thin thermal-plasma components. The temperatures of the hot and cool components are approximately 3.0 and 1.3 keV, respectively, and the temperature of these components are both nearly constant over the central 10′ radius from the center of M 87. The spectrum of M 87NW, on the other hand, can be well fitted by a single thin thermal-plasma model of ∼ 2.7 keV temperature. The abundances of Fe, Si, and S rise towards the center of M 87, though the ratios of Si/Fe and S/Si remain constant. We also found, contrary to the Einstein results, that the abundance ratio of oxygen to iron (O/Fe) is smaller than the solar value. We found no strong nuclear activity from M 87.
Keywords
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
Preview
Unable to display preview. Download preview PDF.
References
Binggeli, B., Tammann, G. A., and Sandage, A. 1987, AJ, 94, 251
Böhringer, H., Nulsen, P. E. J., Braun, R. et al. 1995, MNRAS, 274, L67
Canizares, C. R., Clark, G. W., Jernigan, J. G., et al. 1982, ApJ, 262, 33
Fabricant, D., Lecar, M., and Gorenstein, P. 1980, ApJ, 241, 552
Fabricant, D., and Gorenstein, P. 1983, ApJ, 267, 535
Fukazawa, Y., Ohashi, T., Fabian, A. C. et al. 1994, PASJ, 46, L55
Hanson, C. G., Skinner, G. K., Eyles, C. J. et al. 1990, MNRAS, 242, 262
Hatsukade, I. 1989, Ph.D. Thesis, Osaka University
Ikebe, Y. 1996, Ph.D. thesis, University of Tokyo
Koyama, K., Takano, S., and Tawara, Y. 1991, Nature, 350, 135
Lea, S. M., Reichert, G., Mushotzky, R. F. et al. 1981, ApJ, 246, 369
Lea, S. M., Mushotzky, R., and Holt, S. S. 1982, ApJ, 262, 24
Loewenstein, M., and Mushotzky, R. F. 1996, ApJ, 466, 695
Matsumoto, H., Koyama, K., Awaki, H. et al. 1996, PASJ, 48, 201
Mushotzky, R. F., Done, C., and Pounds, K. A. 1993, ARA&A 31, 717
Mushotzky, R. F., Loewenstein, M., Arnaud, A. et al. 1996, ApJ, 466, 686
Ohashi, T., Fukazawa, Y., Ikebe, Y. et al. 1994, in “New Horizon of X-Ray Astronomy”, ed F. Makino, T. Ohashi (Universal Academy Press, Tokyo) p273
Raymond, J. C., and Smith, B. W. 1977, ApJS, 35, 419
Schreier, E. J., Gorenstein, P., and Feigelson, E. D. 1982, ApJ, 261, 42
Stewart, G. C., Canizares, C. R., Fabian, A. C. et al. 1984, ApJ, 278, 536
Takano, S. 1990, Ph.D. Thesis, The University of Tokyo
Takano, S., and Koyama, K. 1991, PASJ, 43, 1
Tanaka, Y., Inoue, H., and Holt, S. S. 1994, PASJ, 46, L37
Tsai, J. C. 1994, ApJ, 423, 143
Author information
Authors and Affiliations
Editor information
Rights and permissions
Copyright information
© 1999 Springer-Verlag
About this paper
Cite this paper
Matsumoto, H. (1999). ASCA observation of M 87. In: Röser, HJ., Meisenheimer, K. (eds) The Radio Galaxy Messier 87. Lecture Notes in Physics, vol 530. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0106423
Download citation
DOI: https://doi.org/10.1007/BFb0106423
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-66209-9
Online ISBN: 978-3-540-48667-1
eBook Packages: Springer Book Archive