A photometric and spectroscopic study of the early-type binary AI Crucis

Details A photometric and spectroscopic study of the early-type binary AI Crucis A photometric and spectroscopic study of the early-type binary AI Crucis

Jun 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987mnras.226..879b&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 226, June 15, 1987, p. 879-898. Research supported by t

Astronomy and Astrophysics

Astronomy

12

Early Stars, Eclipsing Binary Stars, Stellar Spectrophotometry, Mass Transfer, Radii, Stellar Mass Accretion, Stellar Mass Ejection

Scientific paper

New Stromgren photometry and medium-dispersion spectroscopy of the early-type eclipsing binary AI Cru are presented. The masses and radii of the two components are found to be 9.8 + or - 0.5 and 5.8 + or - 0.3 solar masses, and 4.9 + or - 0.1 and 4.4 + or - 0.1 solar radii, respectively. The semidetached nature of the system is confirmed, and it is shown by comparison with stationary models by Horn et al. (1970), that AI Cru has probably passed through the rapid phase of Case A mass transfer. It is suggested that the original system may have had a period of about 1.3 day, and that the roles of the current primary and secondary components were at that time reversed.

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