Astronomy and Astrophysics – Astronomy
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.191..521d&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 191, May 1980, p. 521-532. Research supported by the Science Research C
Astronomy and Astrophysics
Astronomy
24
Binary Stars, Metallic Stars, Manganese, Mass Ratios, Mercury (Metal), Orbital Elements, Radial Velocity, Stellar Motions, Stellar Spectra, Stellar Spectrophotometry, Velocity Measurement
Scientific paper
New radial velocity measurements of coude plates from the Hale Observatories taken between 1955 and 1978 are presented, which demonstrate that the Hg-Mn star Iota CrB is a double-lined spectroscopic binary with a period of 35.47 day and a semiamplitude of 2.3 km/s. Lines of the secondary star are seen for AlI, NiI and NiII; these lines exhibit velocity shifts 180 deg out of phase with the primary star's velocity variations, so that a mass ratio can be determined. These results are used to show that Smith and Parsons's line-profile asymmetries are consistent with the binary model. Therefore no convincing evidence for 'true' asymmetries in Hg-Mn stars exists.
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