Photometric monitoring of the young star Par 1724 in Orion

Details Photometric monitoring of the young star Par 1724 in Orion Photometric monitoring of the young star Par 1724 in Orion

2009-05-12

arxiv.org/abs/0905.1807v1

Astron.Nachr.330:493-503,2009

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

AN in press (eps or ps files on http://www.astro.uni-jena.de/Observations/gsh/gsh_papers.htm)

Scientific paper

10.1002/asna.200911196

We report new photometric observations of the 200000 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 90cm Dutch telescope on La Silla, the 80cm Wendelstein telescope, and a 25cm 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.

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