Long-term variability of galactic X-ray sources

Details Long-term variability of galactic X-ray sources Long-term variability of galactic X-ray sources

Oct 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978natur.275..723l&link_type=abstract

Nature, vol. 275, Oct. 26, 1978, p. 723-725.

Astronomy and Astrophysics

Astronomy

3

Galactic Radiation, Variability, X Ray Sources, Binary Stars, Galactic Nuclei, Neutron Stars, Oso-7, Spaceborne Astronomy, Spectrum Analysis, Tables (Data), X Ray Astronomy

Scientific paper

The long-term (days to months) variability of 32 persistent galactic X-ray sources brighter than Cas A in the energy range 3-10 keV is examined on the basis of data from the MIT experiment on the OSO 7 satellite. Old population X-ray sources covered include several near the galactic center (bulge sources) and several lying in globular clusters. Sources of both of these groups are characterized by spectra which are markedly softer than those of massive binaries and an apparent absence of pulsations and eclipses. The long-term variability of the bulge sources is generally much less than that of the globular cluster sources. This suggests an essential difference between the two groups, either in their nature or in certain critical properties of their components, such as the masses of the nuclear-burning companions which may supply the material for accretion to compact objects in binary systems.

Affiliated with

Also associated with

No associations

Rating

Long-term variability of galactic X-ray sources does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Long-term variability of galactic X-ray sources, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-term variability of galactic X-ray sources will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1692307