Study of the optical variability of T Tau in the period 1962 2003

Details Study of the optical variability of T Tau in the period 1962 2003 Study of the optical variability of T Tau in the period 1962 2003

Feb 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005astl...31..109m&link_type=abstract

Astronomy Letters, vol. 31, Issue 2, p.109-116

Astronomy and Astrophysics

Astronomy

8

Stars&#8212, Variable And Peculiar

Scientific paper

We present the results of our long-term U BV R observations of the star T Tauri performed at Mt. Maidanak Observatory from 1986 until 2003. These data, together with previous photoelectric observations of other authors, suggest that the long-term variations of the light curve are not periodic, but have a cycle with a time scale of 6 9 yr. The light curve also exhibits slower variations with time scales of ˜30 40 yr. We confirm the existence of periodic brightness variations with a period of over many years; this process is peculiar in that the phase and shape of the phase curve change from season to season. We analyze the color behavior of the star. We found evidence of a strong flare occurred on October 5, 1999, when the brightness of the star reached . This is the strongest flare recorded during its photoelectric observations.

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