Photometric monitoring of the young star Par 1724 in Orion

✍ Scribed by R. Neuhäuser; A. Koeltzsch; St. Raetz; T. O. B. Schmidt; M. Mugrauer; N. Young; F. Bertoldi; T. Roell; T. Eisenbeiss; M. M. Hohle; M. Vaňko; C. Ginski; W. Rammo; M. Moualla; C. Broeg

• Publisher: John Wiley and Sons
• Year: 2009
• Tongue: English
• Weight: 729 KB
• Volume: 330
• Category: Article
• ISSN: 0004-6337
• DOI: 10.1002/asna.200911196

✦ Synopsis

Abstract

We report new photometric observations of the ∼200 000 year old naked weak‐line run‐away T Tauri star Par 1724, located north of the Trapezium cluster in Orion. We observed in the broad band filters B, V, R, and I using the 90 cm Dutch telescope on La Silla, the 80 cm Wendelstein telescope, and a 25 cm telescope of the University Observatory Jena in Großschwabhausen near Jena. The photometric data in V and R are consistent with a ∼5.7 day rotation period due to spots, as observed before between 1960ies and 2000. Also, for the first time, we present evidence for a long‐term 9 or 17.5 year cycle in photometric data (V band) of such a young star, a cycle similar to that to of the Sun and other active stars (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)