Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...334l..25g&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 334, Nov. 1, 1988, p. L25-L29.
Astronomy and Astrophysics
Astrophysics
57
Celestial Mechanics, Companion Stars, Triple Stars, X Ray Binaries, X Ray Sources, Accretion Disks, Globular Clusters, Neutron Stars, Three Body Problem, Ubv Spectra
Scientific paper
The optical counterpart of the 50 minute binary and X-ray burst source 4U 1915-05 has been identified with a 21st mag blue object. Extensive CCD photometric observations show that the optical modulation of the system defines a period of 50.4567 minutes with high precision and is thus probably the true orbital period, whereas the range of X-ray ray dip period values (49.7-50.1 minutes) reported previously are excluded. A model is described whereby the optical modulation is due to partial eclipse of the rim of the accretion disk by a low-mass companion star and the X-ray dips are due to absorption and scattering by blobs of material above and below the disk plane and with density proportional to the current mass transfer rate from the companion star. The 1 percent difference in periods may suggest that the system is a hierarchical triple with a third companion star of low-mass orbiting the binary ion in an about 2.5 day retrograde orbit. The possible origin of such a system by tidal capture in a globular cluster, since disrupted, is briefly discussed.
Bailyn Charles D.
Cohn Henry
Grindlay Jonathon E.
Lugger Phyllis Minnie
Thorstensen John R.
No associations
LandOfFree
Discovery of a possible X-ray triple - 4U 1915-05 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 Discovery of a possible X-ray triple - 4U 1915-05, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of a possible X-ray triple - 4U 1915-05 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1825806