Results of the photometry of the spotted dM1-2e star EY Draconis

Details Results of the photometry of the spotted dM1-2e star EY Draconis Results of the photometry of the spotted dM1-2e star EY Draconis

2007-08-14

arxiv.org/abs/0708.1864v1

Astronomy and Astrophysics

Astrophysics

4 pages, 7 figures with 12 image files, N+N+N conference, accepted for publication in AN

Scientific paper

10.1002/asna.200710801

We have observed EY Draconis with the 24`` telescope of Konkoly Observatory in Budapest for 64 nights. In the first obse rving season the star produced a stable light curve for more than 60 rotation periods, however, the light curves observe d in the next season and the spot modelling show clear evidence of the evolution of the spotted stellar surface. The chan ges of the maximum brightness level suggests the existence of a longer period of about 300 days, which seems to be confir med by the ROTSE archival data.

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