Possible shrinking of the primary component of Epsilon Aurigae

Details Possible shrinking of the primary component of Epsilon Aurigae Possible shrinking of the primary component of Epsilon Aurigae

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.122..387s&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 122, no. 2, May 1986, p. 387-393.

Astronomy and Astrophysics

Astrophysics

10

Eclipsing Binary Stars, Gravitational Collapse, Radial Velocity, Stellar Mass, Absorption Spectra, H Alpha Line, Light Curve, Near Ultraviolet Radiation, Stellar Spectrophotometry

Scientific paper

Radial velocities of the primary star of ɛ Aur are presented for phases outside the eclipse between 1975 and 1985. A violent collapse of the atmosphere has occurred with a velocity of about 40 km s-1 on October 1977, indicating a decrease of 0.07 AU in the radius for three days. A shrinking of the primary star is suggested from the characteristics of eclipse light curves that the duration of totality has become longer and the duration of eclipse shorter from eclipse to eclipse. The decrement of radius is estimated to be about 16%, 0.2 AU, in recent 27 years.

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