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

S. Dong, B. Katz, J.L. Prieto, A. Udalski, S. Kozlowski, R.A. Street, D.M. Bramich, Y. Tsapras, M. Hundertmark, C. Snodgrass, K. Horne, M. Dominik, Roberto Jose 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 ΔmI 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-α 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.

Original languageEnglish
Number of pages4
JournalAstrophysical Journal
Volume788
Issue number1
Early online date20 May 2014
DOIs
Publication statusPublished - 10 Jun 2014

Keywords

  • Binaries: eclipsing
  • Circumstellar matter
  • Stars: individual (OGLE-LMC-ECL-11893)
  • Stars: variables: T Tauri
  • Herbig Ae/Be

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