Peculiar A-stars and planetary systems

Details Peculiar A-stars and planetary systems Peculiar A-stars and planetary systems

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975ap%26ss..35..403d&link_type=abstract

Astrophysics and Space Science, vol. 35, July 1975, p. 403-408.

Astronomy and Astrophysics

Astrophysics

9

A Stars, Extrasolar Planets, Planetary Evolution, Planetary Systems, Stellar Evolution, Stellar Spectra, Binary Stars, Chemical Composition, Mass Transfer, Stellar Mass

Scientific paper

It is suggested that a number of spectral anomalies observed in some A-stars (Am and Ap-stars) may be due to the existence of planetary systems. Terrestrial-type planets condense in matter exchanged between components of close binaries. Exchange of matter takes place at the stage of system formation and in later stages of evolution with both late and early stars. If the outer layers of components in a system do not become renewed by mixing or outflow, then surface anomalies in the chemical composition of stars onto which fall some of the forming planetoids may serve as evidence of the formation of planets.

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