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Astron. Astrophys. 350, 513-516 (1999)


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Research Note

Time series analysis of V 368 Cephei photometry *

J. Kahanpää 1, L. Jetsu 1, L. Alha 1, O.V. Ezhkova 2, K.N. Grankin 2, T. Hackman 1, M.A. Ibragimov 2, M. Kokko 1, V.B. Kondratiev 2, T. Laakso 1, O. Lindroos 1, S.Yu. Mel'nikov 2, P.O. Nikula 1, J. Schultz 1, V.S. Shevchenko 2, J. Torppa 1, I. Tuominen 3, J. Tyynelä 1 and J. Virtanen 1

1 Observatory, P.O. Box 14, University of Helsinki, 00014, Finland
2 Astronomical Institute of the Academy of Sciences of Uzbekistan, Astronomicheskaya 33, Tashkent 700052, Uzbekistan
3 Astronomy Division, University of Oulu, P.O. Box 3000, 90410 Oulu, Finland

Received 18 June 1998 / Accepted 6 August 1999

Abstract

Our time series analysis of V 368 Cep photometry ascertains the rotation period of [FORMULA] uniquely. The manifestations of starspot induced luminosity variations in this chromospherically active star include rapid light curve changes and differential rotation of about 3%. We conclude that the single rapidly rotating variable V 368 Cep is a high inclination K1v post T Tauri star.

Key words: stars: variables: general – stars: individual: V 368 Cep – techniques: photometric

* Table 5 is only available in electronic form at CDS via anonymous ftp to ftp://edarc.u-strasbg.fr/pub/cats/J/A+A/350/513 (130.79.1285) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/350/513

Send offprint requests to: jetsu@gstar.astro.helsinki.fi

© European Southern Observatory (ESO) 1999

Online publication: October 4, 1999

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