Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.2077l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, Oct. 1985, p. 2077-2081.
Astronomy and Astrophysics
Astronomy
18
Astronomical Spectroscopy, Binary Stars, Orbit Calculation, Stellar Orbits, X Ray Sources, Emission Spectra, H Beta Line, Periodic Variations, Radial Velocity, Scorpius Constellation
Scientific paper
Radial velocities of Sco X-1 were measured for eight consecutive days in 1982 in order to confirm that the 0.787313 d photometric period found by Gottleib et al. (1975) is identical with the orbital period. High SNR spectra of Sco X-1, obtained by the McGraw-Hill Observatory 1.3-m reflector, were reduced to emission-line radial velocities. He II 4686-A emissions were highly visible around the orbit, and their base velocities agreed well in phase with those of Crampton et al. (1976), when compared using the precise photometric period of Gottleib et al., indicating that the spectroscopic and photometric periods of 0.787 d are identical. This exact period accurately predicts velocity phase after a lapse of nearly 7 yr, and hence is almost certainly the orbital period. The H-beta line wanders somewhat in phase, which seems to explain the discrepancy between the various results in the literature.
LaSala Jerry
Thorstensen John R.
No associations
LandOfFree
Confirmation of the orbital period of Scorpius X-1 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 Confirmation of the orbital period of Scorpius X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Confirmation of the orbital period of Scorpius X-1 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1545418