Properties of OB supergiants in the Large Magellanic Cloud. I. Energy distributions of 10 B supergiants

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164905· OSTI ID:6541700

Fitzpatrick, E L

It is demonstrated here that line-blanketed, LTE plane-parallel model atmosphere calculations provide excellent fits to the energy distributions from the ultraviolet through the visual ranges of B supergiants in the LMC. The models are computed using the atmosphere program of Kurucz (1979) but have been constructed with lower gravities than were contained in Kurucz's model grid. The models are also shown to fit the ultraviolet through near-infrared continua of several lightly reddened luminous Milky Way stars. Measurements of effective temperatures and gravities for 10 LMC B supergiants from model fits to the continua are used to obtain estimates of the radii, luminosities, and masses of the stars. For supergiants earlier than type B2, these parameters are reasonable when compared to the results of stellar evolution calculations. The results for the later B types, however, appear incompatible with evolution theory. 70 references.

• Research Organization: Joint Institute for Laboratory Astrophysics, Boulder, CO
• OSTI ID: 6541700
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 312; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
ENERGY SPECTRA
EQUILIBRIUM
GALAXIES
GIANT STARS
LTE
MAGELLANIC CLOUDS
MATHEMATICAL MODELS
MILKY WAY
SPECTRA
SPECTROPHOTOMETRY
STAR EVOLUTION
STAR MODELS
STARS
STELLAR ATMOSPHERES
SUPERGIANT STARS