On the existence of undersize subgiant components in close binary stars

Details On the existence of undersize subgiant components in close binary stars On the existence of undersize subgiant components in close binary stars

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979a%26a....73...31c&link_type=abstract

Astronomy and Astrophysics, vol. 73, no. 1-2, Mar. 1979, p. 31-36. Research supported by the Consiglio Nazionale delle Ricerche

Astronomy and Astrophysics

Astrophysics

9

Binary Stars, Giant Stars, Mass Transfer, Stellar Evolution, Main Sequence Stars, Orbital Elements, Stellar Mass Accretion, Stellar Mass Ejection

Scientific paper

The problem of the existence of undersize subgiant components in close binaries is considered. Sixteen systems classified as sd-d after Hall's research (1974) on the argument, have been studied by applying his method for the sake of homogeneity. Collecting our results and those of Hall, a total of 37 systems have been examined. The conclusion is that till now, there is no strong evidence to support the existence of post-main-sequence mass-exchange remnants with the subgiant smaller than its Roche lobe (i.e., sd-d systems).

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