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ROSAT Observations of Globular Clusters in the Galaxy and in M31

Published online by Cambridge University Press:  25 May 2016

Helen M. Johnston ,
Frank Verbunt ,
Günther Hasinger  and
Wolfram Bunk
Helen M. Johnston
Affiliation:
Astronomical Institute, Utrecht University, Postbus 80.000, NL-3508 TA Utrecht, The Netherlands
Frank Verbunt
Affiliation:
Astronomical Institute, Utrecht University, Postbus 80.000, NL-3508 TA Utrecht, The Netherlands
Günther Hasinger
Affiliation:
Astrophysikalisches Institut, An der Sternwarte 16, D-14482 Potsdam, Germany
Wolfram Bunk
Affiliation:
MPI für extraterrestrische Physik, D-85748 Garching bei München, Germany

Abstract

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X-ray sources in globular clusters fall into two categories: the “bright” sources, with LX ∼ 1036-1038 erg s−1, and the “dim” sources, with LX ≲ 1034.5 erg s−1. The bright sources are clearly associated with accreting neutron stars in binary systems. The nature of the dim sources, however, remains in doubt. We review recent observations of globular-cluster X-ray sources with the ROSAT satellite. ROSAT detected bright sources in M31 globular clusters and greatly increased the number of dim sources known in galactic globular clusters. We discuss what these new observations have taught us about the distribution and nature of such sources, their spectral properties, and their underlying luminosity function.

Type
6 Binaries in Globular Clusters
Information
Symposium - International Astronomical Union , Volume 165: Compact Stars in Binaries , 1996 , pp. 389 - 400
Copyright
Copyright © Kluwer 1996 

References

Avni, Y. et al. 1980, ApJ 238, 800.Google Scholar
Belloni, T., Verbunt, F. & Schmitt, J. 1993, A&A, 269 175.Google Scholar
Bradt, H. & McClintock, J. 1983, ARA&A 21, 13.Google Scholar
Cool, A. et al. 1993, ApJ, 410 L103.CrossRefGoogle Scholar
Dempsey, R. et al. 1993, ApJS 86, 599.Google Scholar
Djorgovski, S. 1993, in Structure and Dynamics of Globular Clusters , Djorgovski, S. & Meylan, G. (Eds.), ASP Conf. Proc. Vol. 50, p. 373.Google Scholar
Forman, W. et al. 1978, ApJS 38, 357.Google Scholar
Fruchter, A. et al. 1992, Nat 359, 303.Google Scholar
Grindlay, J. 1993, in Structure and Dynamics of Globular Clusters , Djorgovski, S. & Meylan, G. (Eds.), ASP Conf. Proc. Vol. 50, p. 285.Google Scholar
Grindlay, J. 1994, in The Evolution of X-ray Binaries , Holt, S.S. & Day, C.S. (Eds.), AIP Conf. Proc. Vol. 308, p. 339.Google Scholar
Hasinger, G. 1994, in The Evolution of X-ray Binaries , Holt, S.S. & Day, C.S. (Eds.), AIP Conf. Proc. Vol. 308, p. 611.Google Scholar
Hasinger, G., Johnston, H. & Verbunt, F. 1994, A&A 288, 466.Google Scholar
Hertz, P. & Grindlay, J. 1983, ApJ 275, 105.CrossRefGoogle Scholar
Hertz, P. & Wood, K. 1985, ApJ 290, 171.CrossRefGoogle Scholar
Hertz, P., Grindlay, J. & Bailyn, C. 1993, ApJ 410, L87.CrossRefGoogle Scholar
Johnston, H., Verbunt, F. & Hasinger, G. 1994, A&A 289, 763.Google Scholar
Katz, J. 1975, Nat 253, 698.Google Scholar
King, I. et al. 1993, ApJ 413, L117.CrossRefGoogle Scholar
Kulkarni, S. et al. 1992, Nat 359, 300.Google Scholar
Lewin, W. & Joss, P. 1981, Space Sci. Rev. 28, 3.Google Scholar
Lyne, A. 1992, in X-ray binaries and the formation of binary and millisecond pulsars , van den Heuvel, E.P.J. & Rappaport, S. (Eds.), Kluwer, Dordrecht, p. 79.Google Scholar
Magnier, E. 1994, in The Evolution of X-ray Binaries , Holt, S.S. & Day, C.S. (Eds.), AIP Conf. Proc. Vol. 308, p. 640.CrossRefGoogle Scholar
Margon, B. 1994, in New Horizon of X-ray Astronomy , Makino, F. & Ohashi, T. (Eds.), Universal Academy Press, p. 395.Google Scholar
Paresce, F., de Marchi, G. & Ferraro, F. 1992, Nat 360, 46.Google Scholar
Predehl, P., Hasinger, G. & Verbunt, F. 1991, A&A 246, L21.Google Scholar
Primini, F., Forman, W. & Jones, C. 1993, ApJ 410, 615.Google Scholar
Rappaport, S. et al. 1994, ApJ 423, 633.Google Scholar
Supper, R. 1994, in The Evolution of X-ray Binaries , Holt, S.S. & Day, C.S. (Eds.), AIP Conf. Proc. Vol. 308, p. 631.Google Scholar
Supper, R. et al. 1995, (in preparation).Google Scholar
Van Teeseling, A. & Verbunt, F. 1994, A&A (in press).Google Scholar
Verbunt, F., Van Paradijs, J. & Elson, E. 1984, MNRAS 210, 899.Google Scholar
Verbunt, F. et al. 1994, A&A (submitted).Google Scholar
Watson, M., King, A. & Osborne, J. 1985, MNRAS 212, 917.Google Scholar