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Comparison of X-Ray Sources in Old Open and in Globular Clusters

Published online by Cambridge University Press:  25 May 2016

Frank Verbunt
Frank Verbunt*
Affiliation:
Astronomical Institute, Utrecht University, Postbox 80.000, 3508 TA Utrecht, the Netherlands (verbunt@fys.ruu.nl)

Abstract

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Twelve bright (Lx ≳ 1036erg/s) X-ray sources have been detected in globular clusters: they are accreting neutron stars. Five of these are transients. Thirty less luminous sources have been detected in eighteen globular clusters. The luminosity function of these sources does not rise rapidly towards lower luminosities. The sources with Lx ∼ 1033 erg/s are probably transients in their low state; the least luminous sources currently detected may be cataclysmic variables. The old open cluster M 67 harbours chromospherically active binaries, with Lx ∼ 1030−31erg/s. Globular clusters contain fewer of these binaries than estimated by scaling with mass from M 67.

Type
August 25: X Ray and Compact Objects in Globular Clusters
Information
Symposium - International Astronomical Union , Volume 174: Dynamical Evolution of Stars Clusters , 1996 , pp. 183 - 192
Copyright
Copyright © Kluwer 1996 

References

Belloni, T., Verbunt, F. 1995, A&A, in press Google Scholar
Belloni, T., Verbunt, F., Schmitt, J. H. M. M. 1993, A&A, 269, 175 Google Scholar
Cool, A. M., Grindlay, J. E., Cohn, H. N., Lugger, P. M., Slavin, S. D. 1995, ApJ, 439, 695 CrossRefGoogle Scholar
Cool, A. M., Grindlay, J. E., Krockenberger, M., Bailyn, C. D. 1993, ApJ, 410, L103 CrossRefGoogle Scholar
Danner, R., Kulkarni, S. R., Thorsett, S. E. 1994, ApJ, 436, L153 CrossRefGoogle Scholar
Fabian, A., Pringle, J., Rees, M. 1975, MNRaS, 172, 15P CrossRefGoogle Scholar
Gilliland, R. L., Brown, T. M., Duncan, D. K., Suntzeff, N. B., Lockwood, G. W., Thompson, D. T., Schild, R. E., Jeffrey, W. A., Penprase, B. E. 1991, AJ, 101, 541 CrossRefGoogle Scholar
Grindlay, J. E. 1993, in Structure and Dynamics of Globular Clusters, ASP Conf. Ser. 50, eds. Djorgovski, S.G. and Meylan, G., p.285 Google Scholar
Grindlay, J. E. 1995, submitted to ApJ Google Scholar
Hasinger, G., Johnston, H. M., Verbunt, F. 1994, A&A, 288, 466 Google Scholar
Hertz, P., Grindlay, J. E. 1983, ApJ, 275, 105 CrossRefGoogle Scholar
Hertz, P., Grindlay, J. E., Bailyn, C. D. 1993, ApJ, 410, L87 CrossRefGoogle Scholar
Hertz, P., Wood, K. S. 1985, ApJ, 290, 171 CrossRefGoogle Scholar
Hills, J. 1976, MNRaS, 175, 1P CrossRefGoogle Scholar
Johnston, H. M., Verbunt, F. 1996, A&A, in press Google Scholar
Johnston, H. M., Kulkarni, S. R., Phinney, E. S. 1992, in van den Heuvel, E. P. J., Rappaport, S. A. (eds.), X-ray binaries and the formation of binary and millisecond pulsars, Kluwer, Dordrecht, p. 349 Google Scholar
Johnston, H. M., Verbunt, F., Hasinger, G. R. 1994, A&A, 289, 763 Google Scholar
Johnston, H. M., Verbunt, F., Hasinger, G. R. 1995a, A&A, 298, L21 Google Scholar
Johnston, H. M., Verbunt, F., Hasinger, G. R., Bunk, W. 1995b, in IAU Symposium 165, Compact Stars in Binaries, ed. van den Heuvel, E. P. J., in press Google Scholar
Johnston, H. M., Verbunt, F., Hasinger, G. R. 1996, A&A, in press Google Scholar
Latham, D. W., Mathieu, R. D., Milone, A. A. E., Davis, R.J. 1992, in Binaries as tracers of stellar formation, eds. Duquennoy, A., Mayor, M., p. 132 Google Scholar
Magnier, E. 1994, in Holt, S. S., Day, C. (eds.), The Evolution of X-ray Binaries, AIP, New York, p. 640 Google Scholar
McHardy, I. M., Lawrence, A., Pye, J. P., Pounds, K. A. 1981, Mon. Not. R. astr. Soc., 197, 893 CrossRefGoogle Scholar
Paresce, F., DeMarchi, G. 1994, ApJL, 427, L33 CrossRefGoogle Scholar
Paresce, F., DeMarchi, G., Ferraro, F. 1992, Nat, 360, 46 CrossRefGoogle Scholar
Pasquini, L., Belloni, T., Abbott, T. M. C. 1994, A&A, 290, L17 Google Scholar
Pye, J. P., Hodgkin, S. T., Stern, R. A., Stauffer, J. R. 1994, MNRaS, 266, 798 CrossRefGoogle Scholar
Stern, R. A., Schmitt, J. H. M, Rosso, C., Pye, J. P., Hodgkin, S. T., Stauffer, J. R. 1993, ApJL, 399, L159 CrossRefGoogle Scholar
Trinchieri, G., Fabbiano, G. 1991, ApJ, 382, 82 CrossRefGoogle Scholar
Verbunt, F., Hut, P. 1987, in Helfand, D. J., Huang, J.-H. (eds.), The Origin and Evolution of Neutron Stars, IAU Symposium 125, Reidel, Dordrecht, p. 187 CrossRefGoogle Scholar
Verbunt, F., Phinney, E. S. 1995, A&A, 296, 709 Google Scholar
Verbunt, F., Bunk, W., Hasinger, G., Johnston, H. M. 1995, A&A, 300, 732 Google Scholar
Zahn, J.-P. 1966, Ann. d'Ap., 29, 313 & 489 Google Scholar