OGLE-LMC-ECL-11893: The Discovery of a Long-period Eclipsing Binary with a Circumstellar Disk

TitleOGLE-LMC-ECL-11893: The Discovery of a Long-period Eclipsing Binary with a Circumstellar Disk
Publication TypeJournal Article
Year of Publication2014
AuthorsDong, S, Katz, B, Prieto, J L, Udalski, A, Kozlowski, S, Street, R A, Bramich, D M, Tsapras, Y, Hundertmark, M, Snodgrass, C, Horne, K, Dominik, M, R. Jaimes, F
Journal\apj
Volume788
Pagination41
Keywordsbinaries: eclipsing, circumstellar matter, Herbig Ae/Be, stars: individual: OGLE-LMC-ECL-11893, stars: variables: T Tauri
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 {$Δ$}m$_{I}$ {\ap} 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, the eclipses of OGLE-LMC-ECL-11893 retain the same shape throughout the span of \~{}17 yr (13 orbital periods), indicating no measurable orbital precession of the disk. }

DOI10.1088/0004-637X/788/1/41
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