Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apjs...50..551j&link_type=abstract
Astrophysical Journal Supplement Series, vol. 50, Dec. 1982, p. 551-572.
Astronomy and Astrophysics
Astronomy
6
Early Stars, Interstellar Matter, Iue, Nebulae, Stellar Spectra, Ultraviolet Astronomy, Extreme Ultraviolet Radiation, Interstellar Radiation, Line Spectra, Stellar Luminosity, Stellar Mass Ejection, Stellar Winds, Tables (Data)
Scientific paper
The objects are + 60 deg 2522 in NGC 7635, Sigma Ori AB and Sigma Ori E centered in a faint elliptical nebula, and AG Car in its nebula. Definite spectra are identified and classified according to photospheric, P Cygni, or interstellar types. Estimates of equivalent width or FWHM are included in the tables. Velocities are given and discussed. The extreme ultraviolet edges of P Cygni profiles imply terminal wind speeds that improve to extend earlier velocity data for use in the theories of energy conserving or momentum conserving modes of interaction of stellar winds with ambient interstellar media. The respective modes lead to mass loss rates of 1-10 x 10 to the -7th solar masses per yr for + 60 deg 2522 and 6-14 x 10 to the -6th solar masses per yr for AG Car. The expansion velocity for the Sigma Ori nebula is not yet known for application of the interaction theory.
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