Astronomy and Astrophysics – Astronomy
Scientific paper
May 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..994g&link_type=abstract
Astrophysical Journal, Part 1, vol. 229, May 1, 1979, p. 994-1000.
Astronomy and Astrophysics
Astronomy
34
Binary Stars, Oao 2, Spaceborne Astronomy, Spectral Energy Distribution, Stellar Luminosity, Ultraviolet Photometry, Hot Stars, M Stars, Roche Limit
Scientific paper
Ultraviolet broadband photometry obtained with the Wisconsin Experiment Package on OAO 2 is presented for the symbiotic binary star AG Peg. The hot component of the binary is found to be a luminous ultraviolet source, with an energy distribution consistent with its WN6 optical spectral type. Total luminosities of 1000 and 17,000 suns are found for the hot star by assuming, respectively, that the giant primary of AG Peg is a normal M3 III star and that it fills its Roche lobe. The eruptive behavior of AG Peg is shown to require the higher luminosity, and the activity in AG Peg is discussed in terms of a very slow novalike nuclear-powered event.
Anderson Martha C.
Gallagher Jay S.
Holm Albert V.
Webbink Ronald F.
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