Detection of periods for T Tauri stars*
MPG Research Unit “Staub in Sternentstehungsgebieten”, Schillergäßchen 2-3, 07745 Jena, Germany. e-mail: email@example.com
2 MPIA Heidelberg, Königstuhl 17, 69117 Heidelberg, Germany
Send offprint request to: M. Osterloh
Accepted: 23 March 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
© European Southern Observatory (ESO), 1996