Light variations of massive stars (Alpha Cygni variables). XIII - The B-type hypergiants R81 (LBV), HD 80077 (LBV?), HD 168607 = V 4029 Sagittarii (LBV) and HD 168625 = V 4030 Sagittarii

Details Light variations of massive stars (Alpha Cygni variables). XIII - The B-type hypergiants R81 (LBV), HD 80077 (LBV?), HD 168607 = V 4029 Sagittarii (LBV) and HD 168625 = V 4030 Sagittarii Light variations of massive stars (Alpha Cygni variables). XIII - The B-type hypergiants R81 (LBV), HD 80077 (LBV?), HD 168607 = V 4029 Sagittarii (LBV) and HD 168625 = V 4030 Sagittarii

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264...88v&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 1, p. 88-104.

Astronomy and Astrophysics

Astrophysics

42

B Stars, Massive Stars, Stellar Luminosity, Supergiant Stars, Variable Stars, Hertzsprung-Russell Diagram, Light Curve, Stellar Color, Stellar Spectrophotometry, Ubv Spectra

Scientific paper

We present and discuss VBLUW and uvby photometry of four Alpha Cyg variables: the B-type hypergiants R81, HD 80077, HD 168607 = V 4029 Sgr, and HD 168625 = V 4030 Sgr. Quasi-periods of the light variations amount to 24,41 or 55,58 and 35 days, respectively. The maximum light amplitude (MLA) of R 81 and HD 168607 clearly reflects their LBV character. That for HD 80077 suggests that it could be an LBV also. Normal Alpha Cyg variables and those which suffer from episodic mass loss eruptions, the LBVs appear to listen to the same P = constant lines in the HR diagram, but the light curves of both types show morphological differences.

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