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Exploring the Nature of Weak Chandra Sources Near the Galactic Centre

  • R. M. Bandyopadhyay (a1), K. M. Blundell (a1), Ph. Podsiadlowski (a1), J. C. A. Miller-Jones (a1), Q. D. Wang (a2), W. N. Brandt (a3), S. Rappaport (a4) and E. Pfahl (a5)...

Extract

We present early results from the first near-IR imaging of the weak X-ray sources discovered in the recent Chandra/ACIS-I survey towards the Galactic Centre (GC) (Wang et al. 2002). These ~800 discrete sources, which contribute significantly to the GC X-ray emission, represent an important and previously unknown population within the Galaxy. From our VLT observations we will identify likely IR counterparts to a sample of the hardest sources, which are most likely X-ray binaries. With these data we can place constraints on the nature of the discrete weak X-ray source population of the GC. Once the data analysis is complete we will discuss our results in the context of binary population synthesis models.

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References

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Brandt, W.N., et al.. 2001, AJ, 122, 2810
King, A.R. & Ritter, H., 1999, MNRAS, 309, 253
Meurs, E.J.A. & van den Heuvel, E.P.J., 1989, A&A, 226, 88
Pfahl, E., Rappaport, S., & Podsiadlowski, Ph., 2002, ApJL, 571, L37
Podsiadlowski, Ph. & Rappaport, S., 2000, ApJ, 529, 946
Rappaport, S. & van den Heuvel, E.P.J., 1982, Proc. IAU Symposium 98, p. 327
Wang, Q.D., Gotthelf, E.V., & Lang, C.C., 2002, Nature, 415, 148

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