# DRAMATIC EVOLUTION OF THE DISK-SHAPED SECONDARY IN THE ORION TRAPEZIUM STAR θ1 Ori B1 (BM Ori): MOST SATELLITE OBSERVATIONS

@article{Windemuth2013DRAMATICEO,
title={DRAMATIC EVOLUTION OF THE DISK-SHAPED SECONDARY IN THE ORION TRAPEZIUM STAR $\theta$1 Ori B1 (BM Ori): MOST SATELLITE OBSERVATIONS},
author={Diana Windemuth and William Herbst and Evan Tingle and R. Fuechsl and Roy E. Kilgard and Melanie Pinette and Matthew R. Templeton and Arne H. Henden},
journal={The Astrophysical Journal},
year={2013},
volume={768},
pages={67}
}
• Published 20 March 2013
• Physics
• The Astrophysical Journal
The eclipsing binary {theta}{sup 1} Orionis B{sub 1}, variable star designation BM Ori, is the faintest of the four well-known Trapezium stars at the heart of the Orion Nebula. The primary is a B3 star ({approx}6 M{sub Sun }) but the nature of the secondary ({approx}2 M{sub Sun }) has long been mysterious, since the duration and shape of primary eclipse are inappropriate for any sort of ordinary star. Here we report nearly continuous photometric observations obtained with the MOST satellite…

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