[16.13] The Disappearing Act of KH 15D: Photometric Results from the 2002-2004 Observing Campaigns

AAS 205th Meeting, 9-13 January 2005
Session 16 Ae Be and T Tauri Stars
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[16.13] The Disappearing Act of KH 15D: Photometric Results from the 2002-2004 Observing Campaigns

C.M. Hamilton (Mount Holyoke College), W. Herbst (Wesleyan U.), F.J. Vrba (USNO, Flagstaff Station), M.A. Ibrahimov (Mt. Maidanak Observatory), R. Mundt, C.A.L. Bailer-Jones (MPIA), V.J. Sanchez Bejar (IAC), P. Abraham, M. Kun, A. Moor, J. Benko, S. Csizmadia (Konkoly Observatory), A.V. Filippenko, W. Li (UC Berkeley)

We present the results from the 2002-2004 seasons of photometric monitoring of the eclipsing system KH 15D. The eclipse has continued to evolve in secular fashion, and the eclipses are now approximately 24 days in length, or half the period. A periodogram of the most recent data confirms the spectroscopic period of 48.38 days determined by Johnson et al. (2004). Phasing nine years (1995-2004) of photometric data shows substantial evolution in the width and depth of the eclipses. These results are interpreted and discussed in the context of the recent models for this system put forward by Winn et al. (2004) and Chiang & Murray-Clay (2004).

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