In a search of contact systems among EB-type binaries, the existing photometric observations of TT Her have been analyzed. We find an unambiguous solution, contrary to previous analyses which resented several possibilities. The system is semi-detached, with the primary fillin 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. We conclude that TT Her is the progenitor of an evolved contact binary.
Search for contact systems among EB-type binaries: I. TT Herculis.
BARONE, Fabrizio;
1989-01-01
Abstract
In a search of contact systems among EB-type binaries, the existing photometric observations of TT Her have been analyzed. We find an unambiguous solution, contrary to previous analyses which resented several possibilities. The system is semi-detached, with the primary fillin 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. We conclude that TT Her is the progenitor of an evolved contact binary.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
