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arXiv · 1401.1195

OGLE-LMC-ECL-11893: The discovery of a long-period eclipsing binary with a circumstellar disk

Subo Dong·Boaz Katz·Jose L. Prieto·Andrzej Udalski·Szymon Kozlowski·R. A. Street·D. M. Bramich·Y. Tsapras·M. Hundertmark·C. Snodgrass·K. Horne·M. Dominik·R. Figuera Jaimes
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Abstract

We report the serendipitous discovery of a disk-eclipse system OGLE-LMC-ECL-11893. The eclipse occurs with a period of 468 days, a duration of about 15 days and a deep (up to \Delta I ~1.5), peculiar and asymmetric profile. A possible origin of such an eclipse profile involves a circumstellar disk. The presence of the disk is confirmed by the H-alpha line profile from the follow-up spectroscopic observations, and the star is identified as Be/Ae type. Unlike the previously known disk-eclipse candidates (Epsilon Aurigae, EE Cephei, OGLE-LMC-ECL-17782, KH 15D), the eclipses of OGLE-LMC-ECL-11893 retain the same shape throughout the span of ~17 years (13 orbital periods), indicating no measurable orbital precession of the disk.

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Subo Dong, Boaz Katz, Jose L. Prieto, Andrzej Udalski, Szymon Kozlowski, R. A. Street, D. M. Bramich, Y. Tsapras, M. Hundertmark, C. Snodgrass, K. Horne, M. Dominik, R. Figuera Jaimes. 2014-01-06. OGLE-LMC-ECL-11893: The discovery of a long-period eclipsing binary with a circumstellar disk. https://doi.org/10.1088/0004-637x/788/1/41

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