The X-Ray Spectral Properties of the Bulge of M31
Abstract
The results of a spectral analysis of the Einstein observations of the bulge of M31 are reported. The data can be fitted with a hard thermal spectrum with characteristic temperature kT of about 6-13 keV (at 90 percent confidence). No intrinsic absorption above the galactic value of N(H) is required. These results are in agreement with the presence in the bulge of M31 of a population of low-mass binary sources similar to those of the Milky Way.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- May 1987
- DOI:
- 10.1086/165184
- Bibcode:
- 1987ApJ...316..127F
- Keywords:
-
- Andromeda Galaxy;
- Galactic Structure;
- X Ray Binaries;
- X Ray Spectra;
- Spaceborne Astronomy;
- Spectrum Analysis;
- Astrophysics;
- GALAXIES: INDIVIDUAL MESSIER NUMBER: M31;
- X-RAYS: BINARIES;
- X-RAYS: SPECTRA