Long-term photometric study of LBVs in M33

Details Long-term photometric study of LBVs in M33 Long-term photometric study of LBVs in M33

Jun 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004coast.145...28z&link_type=abstract

Communications in Asteroseismology, vol. 145, p. 28

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The extensive plate collection of Sternberg Astronomical Institute (Moscow) was used for a study of the photometric behaviour of bright variable stars in M33. We present here LBV V268 (VarC) and the LBV-candidate Halpha7. About 600 magnitude estimates were obtained for each star for 1973 - 2002. The light curves of both stars are typical for Luminous Blue Variables. V268 shows large and complex quasiperiodic variations from 2 to 3400 days. In Halpha7, we found several quasi-periods from 20 to 160 days. Amplitudes of these variations depend on the state of activity of the stars.

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