The Delta Scuti-star HD 220392: A possible component of a binary system

Details The Delta Scuti-star HD 220392: A possible component of a binary system The Delta Scuti-star HD 220392: A possible component of a binary system

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ap%26ss.208..285t&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 208, no. 2, p. 285-290

Physics

1

Binary Stars, Distance, Stellar Gravitation, Stellar Magnitude, Stellar Mass, Stellar Physics, Variable Stars, Gravitational Effects, Hertzsprung-Russell Diagram, Stellar Evolution, Stellar Temperature

Scientific paper

Physical parameters and distances are determined for the stars HD 220391 and HD 220392, which possibly form a physical pair. Ages and evolutionary masses in the new track system of Schaller et al. as well as gravitational masses of both stars are evaluated. Distance and age estimates of this possible binary system are obtained: 128(+/- 12) pc and 7.9(+/- 0.8) x 108 yr. Both stars are located within the Delta Scuti instability strip on the Hertzsprung-Russell (H-R) diagram, but a variability was only detected in HD 220392 by Lampens. The pulsation mode(s) and the pulsation mass of this variable star cannot be determined at the present time.

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