The semi-period-luminosity-color relation for supergiant stars

Details The semi-period-luminosity-color relation for supergiant stars The semi-period-luminosity-color relation for supergiant stars

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....65..357b&link_type=abstract

Astronomy and Astrophysics, vol. 65, no. 3, May 1978, p. 357-362.

Astronomy and Astrophysics

Astrophysics

52

Late Stars, Periodic Variations, Stellar Luminosity, Supergiant Stars, Variable Stars, A Stars, B Stars, Bolometers, G Stars, Radial Velocity, Stellar Evolution, Stellar Mass Ejection, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

The semi-period-luminosity-color relation for 32 B- to G-type supergiants is determined using bolometric corrections and evolutionary tracks for massive stars. Empirical calibrations based on the HR diagram give semi-periods from 5-100 days. The pulsation quantity is determined for each star, which is found to vary within a range comparable to that of M-type stars. An oscillatory mechanism is proposed as the driving force behind the supergiant variability.

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