Two supergiants in the Large Magellanic Cloud with thick dust shells

Details Two supergiants in the Large Magellanic Cloud with thick dust shells Two supergiants in the Large Magellanic Cloud with thick dust shells

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...302..675e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 302, March 15, 1986, p. 675-679. NASA-supported research.

Astronomy and Astrophysics

Astronomy

29

Galaxies, Infrared Astronomy Satellite, Magellanic Clouds, Stellar Envelopes, Supergiant Stars, H Alpha Line, M Stars, Radial Velocity

Scientific paper

Ground-based observations from 0.6 to 20 microns have identified two luminous, evolved stars surrounded by thick dust shells among the Magellanic Cloud sources detected by the Infrared Astronomical Satellite. Their energy distributions resemble those of typical Galactic OH/IR stars, but they have bolometric magnitudes brighter than -9 and the small-amplitude variability of supergiants. One star, IRAS 04553 - 6825, has a special type of M7.5 and a dust shell which absorbs and reradiates roughly 75 percent of the star's luminosity; its radial velocity confirms its LMC membership. The second star, IRAS 05346 - 6949, has an even thicker dust shell, and the central star is not observable.

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