Skip to main content Accessibility help
×
Home

ROSAT Observations of Globular Clusters in the Galaxy and in M31

  • Helen M. Johnston (a1), Frank Verbunt (a1), Günther Hasinger (a2) and Wolfram Bunk (a3)

Abstract

X-ray sources in globular clusters fall into two categories: the “bright” sources, with L X ∼ 1036-1038 erg s−1, and the “dim” sources, with L X ≲ 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.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      ROSAT Observations of Globular Clusters in the Galaxy and in M31
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      ROSAT Observations of Globular Clusters in the Galaxy and in M31
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      ROSAT Observations of Globular Clusters in the Galaxy and in M31
      Available formats
      ×

Copyright

References

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

ROSAT Observations of Globular Clusters in the Galaxy and in M31

  • Helen M. Johnston (a1), Frank Verbunt (a1), Günther Hasinger (a2) and Wolfram Bunk (a3)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed