The symbiotic star AG DRA

Details The symbiotic star AG DRA The symbiotic star AG DRA

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986afz....25..435i&link_type=abstract

(Astrofizika, vol. 25, Nov.-Dec. 1986, p. 435-446) Astrophysics (ISSN 0571-7132), vol. 25, no. 3, May 1987, p. 605-612. Translat

Astronomy and Astrophysics

Astrophysics

4

Astronomical Photometry, Stellar Spectrophotometry, Symbiotic Stars, Red Dwarf Stars, Red Giant Stars, Spectral Energy Distribution, Stellar Mass Accretion, White Dwarf Stars

Scientific paper

The results of photometric and spectrophotometric (3300-7500-A) observations of the symbiotic star AG Dra are presented. The star's cold component is a red giant of the spectral class K4-K5 having approximately constant light. At a wavelength of 5 microns, there is an infrared excess associated with the emission of a gas envelope with M = 10 to the -6th solar mass. When the bolometric flux from the hot component is increased, its effective temperature decreases. It is shown that the hot component may be either a red dwarf with M = 0.4 solar mass or a white dwarf with L = 3000 solar luminosities.

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