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Multi-epoch Observations of LMXBs in Early-type Galaxies

Published online by Cambridge University Press:  12 May 2006

Gregory R. Sivakoff ,
Andrés Jordán ,
Adrienne M. Juett ,
Craig L. Sarazin  and
Jimmy A. Irwin
Gregory R. Sivakoff
Affiliation:
Department of Astronomy, University of Virginia, P. O. Box 3818, Charlottesville, VA 22903-0818, USA email: grs8g@virginia.edu, ajuett@virginia.edu, sarazin@virginia.edu
Andrés Jordán
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany; email: ajordan@eso.org Astrophysics, Denys Wilkinson Building, University of Oxford, 1 Keble Road, Oxford, OX1 3RH, UK
Adrienne M. Juett
Affiliation:
Department of Astronomy, University of Virginia, P. O. Box 3818, Charlottesville, VA 22903-0818, USA email: grs8g@virginia.edu, ajuett@virginia.edu, sarazin@virginia.edu
Craig L. Sarazin
Affiliation:
Department of Astronomy, University of Virginia, P. O. Box 3818, Charlottesville, VA 22903-0818, USA email: grs8g@virginia.edu, ajuett@virginia.edu, sarazin@virginia.edu
Jimmy A. Irwin
Affiliation:
Department of Astronomy, 909 Dennison Building, University of Michigan, Ann Arbor, MI 48109-1042, USA; email: jairwin@umich.edu
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Abstract

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Chandra observations of early-type galaxies have resolved large populations of low-mass X-ray binaries (LMXBs) in early-type galaxies. The majority of these observations have been snapshots on the order of a day or less. In our own Galaxy, LMXBs are known to exhibit a range of luminosity and spectral variability. Multi-epoch observations of early-type galaxies are just beginning to explore the regime of variability on timescales of days to years. We present results for NGC 4365 and NGC 4697, and compare them to the Milky Way.

Keywords

binaries: closegalaxies: elliptical and lenticulargalaxies: individual (NGC 4365)galaxies: individual (NGC 4697)X-rays: binariesX-rays: galaxies
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S230: Populations of High Energy Sources in Galaxies , August 2005 , pp. 210 - 214
Copyright
2006 International Astronomical Union