The maximum amplitude of the optical micro-variations of massive O-F type stars (or Alpha Cygni variables, including LBV's or S DOR variables) across the HR diagram

Details The maximum amplitude of the optical micro-variations of massive O-F type stars (or Alpha Cygni variables, including LBV's or S DOR variables) across the HR diagram The maximum amplitude of the optical micro-variations of massive O-F type stars (or Alpha Cygni variables, including LBV's or S DOR variables) across the HR diagram

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...208..135v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 208, no. 1-2, Jan. 1989, p. 135-140.

Astronomy and Astrophysics

Astrophysics

32

F Stars, O Stars, Stellar Luminosity, Stellar Oscillations, Supergiant Stars, Variable Stars, Blue Stars, Hertzsprung-Russell Diagram, Stellar Spectrophotometry

Scientific paper

The maximum light amplitude (MLA) of the microvariations of nearly 100 massive stars with spectral type O 3-F8 are collected from the literature and unpublished material. These variables, called the Alpha Cygni variables, also include the LBVs or S Dor type variables. The S Dor type variables must be in a quiescent stage to detect their intrinsic variations properly. The log T(eff)/MLA diagram exhibits a clear separation between S Dor type variables and the normal Alpha Cygni variables (the majority). The results suggest that the outer layers of both types of stars where gravity waves presumably occur, differ physically from each other.

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