Free Access
Astron. Astrophys. Suppl. Ser.
Volume 120, Number 2, December_I 1996
Page(s) 267 - 274
Published online 15 December 1996
Detection of periods for T Tauri stars DOI: 10.1051/aas:1996291

Astronomy and Astrophysics Supplement Series, Vol. 120, December I 1996, 267-274

Detection of periods for T Tauri stars gif

M. Osterloh , E. Thommes and U. Kania
Send offprint requests to: M. Osterloh

MPG Research Unit ``Staub in Sternentstehungsgebieten'', Schillergäßchen 2-3, 07745 Jena, Germany
e-mail: MPIA Heidelberg, Königstuhl 17, 69117 Heidelberg, Germany

Received August 11, 1995; accepted March 23, 1996


We present the results of monitoring of a sample of T Tauri stars. The method of differential CCD photometry was applied. The observations span a range of ten days and show that eleven out of twelve sources varied during this time interval. These variations are correlated in all bands. Periods were detected (confidence level 99.99%) for eight out of eleven variable stars; one additional period was found at the 99.9% confidence level. Of those, one (BP Tau) agrees with previously published periods; two, GM Aur and IQ Tau, do not; six are new detections of periodicities. The sample is drawn from the Taurus-Auriga and Cepheus IV star-forming regions.

Key words: stars: evolution --- stars: pre main-sequence --- stars: rotation

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