Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217..181o&link_type=abstract
Astrophysical Journal, Part 1, vol. 217, Oct. 1, 1977, p. 181-185.
Astronomy and Astrophysics
Astrophysics
80
Binary Stars, Novae, Stellar Spectrophotometry, X Ray Sources, X Ray Stars, K Stars, Spectral Energy Distribution, Stellar Luminosity, Stellar Temperature, Transient Response
Scientific paper
Observations of the transient X-ray source A0620-00 in November 1976 show that the optical object had an apparent visual magnitude of 18.35. The spectrum is cool and shows that one component of the light comes from a K5 V to K7 V star. The distance is estimated to be 870 pc if the cool star is normal. Some support for the 7.8-day X-ray period recently found is provided by observations made in 1975 during the outburst. In addition to the cool K star, there is a second radiation source which has a flat spectrum. This source can be modeled by a 10,000-K blackbody with a radius (if spherical) of 17,000 km plus a 4000-K blackbody with a radius of 13,400 km and is probably a residual accretion disk. It is very unlikely that the K star can fill its Roche lobe, so that mass transfer to a neutron-star companion by this mechanism is unlikely. It is possible that the K star is losing mass by processes such as those that occur in T Tauri stars.
No associations
LandOfFree
Further spectrophotometry of the transient X-ray source A0620-00 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 Further spectrophotometry of the transient X-ray source A0620-00, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Further spectrophotometry of the transient X-ray source A0620-00 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-745115