On the nature of the 125-day Cepheid V 810 CEN /equals HR 4511/ - IUE spectra

Details On the nature of the 125-day Cepheid V 810 CEN /equals HR 4511/ - IUE spectra On the nature of the 125-day Cepheid V 810 CEN /equals HR 4511/ - IUE spectra

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93l...5e&link_type=abstract

Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. L5, L6.

Astronomy and Astrophysics

Astrophysics

7

B Stars, Cepheid Variables, Companion Stars, Light Curve, Radial Velocity, Ultraviolet Spectra, Early Stars, Giant Stars, Iue, Line Spectra, Stellar Luminosity

Scientific paper

Low and high resolution IUE spectra of the possible extremely long-period, low-amplitude classical Cepheid V 810 Cen (equals HR 4511), are analyzed to determine the effects of its hot blue companion on the observed optical light - and radial velocity - curves. From these spectra we conclude that the early B - type companion is hardly detectable in the optical, and furthermore, that the observed amplitudes and amplitude ratios cannot be explained by a binary system. The observed optical features are clearly due to V 810 Cen itself.

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