Search for contact systems among EB-type binaries. I - TT Herculis

Details Search for contact systems among EB-type binaries. I - TT Herculis Search for contact systems among EB-type binaries. I - TT Herculis

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...210..181m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 210, no. 1-2, Feb. 1989, p. 181-186.

Astronomy and Astrophysics

Astrophysics

23

Eclipsing Binary Stars, Main Sequence Stars, Stellar Mass Accretion, Stellar Spectrophotometry, Light Curve, Mass To Light Ratios, Mass Transfer, Radial Velocity

Scientific paper

In a search of contact systems among EB-type binaries, the existing photometric observations of TT Her have been analyzed. An unambiguous solution, contrary to previous analyses which presented several possibilities is found. The system is semi-detached, with the primary filling the lobe. There is evidence that the primary is evolved off the main sequence, and that mass transfer is taking place from the primary to the secondary, which is therefore enlarged by accretion. The temperature of the primary component is found to be about 7240 K, thus solving one of the problems for this system. It is concluded that TT Her is the progenitor of an evolved contact binary.

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