The circumstellar envelopes of F- and G-type supergiants in the Large Magellanic Cloud

Details The circumstellar envelopes of F- and G-type supergiants in the Large Magellanic Cloud The circumstellar envelopes of F- and G-type supergiants in the Large Magellanic Cloud

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rmxaa...6...59h&link_type=abstract

(International Astronomical Union, Reunion Regional Latinoamericana de Astronomia, 2nd, Merida, Venezuela, Jan. 19-23, 1981) Rev

Astronomy and Astrophysics

Astronomy

Chromosphere, F Stars, G Stars, Magellanic Clouds, Milky Way Galaxy, Stellar Envelopes, Stellar Mass Ejection, Supergiant Stars, H Lines, High Dispersion Spectrographs, K Lines, Stellar Atmospheres, Stellar Spectra

Scientific paper

The outer atmospheres of four F- and G-type supergiants in the LMC are compared with those of their Milky Way counterparts by means of 2.5 and 5.1 A/mm high dispersion Echelle spectra. Na I D line doubling indicates extensive circumstellar envelopes, mass loss rates greater than 0.00001 solar masses/year, and outflow velocities of 10-60 km/sec. The Ca II H and K lines yield new data on extragalactic star chromospheres.

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