OGLE-LMC-ECL-11893: THE DISCOVERY OF A LONG-PERIOD ECLIPSING BINARY WITH A CIRCUMSTELLAR DISK

作者：Dong Subo^*; Katz Boaz; Prieto Jose L; Udalski Andrzej; Kozlowski Szymon; Street R A; Bramich D M; Tsapras Y; Hundertmark M; Snodgrass C; Horne K; Dominik M; Jaimes R Figuera

来源：Astrophysical Journal, 2014, 788(1): 41.

DOI：10.1088/0004-637X/788/1/41

• binaries : eclipsing
• circumstellar matter
• stars : individual (OGLE-LMC-ECL-11893)
• stars : variables : T Tauri
• Herbig Ae/Be

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 m(I) approximate to 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 similar to 17 yr (13 orbital periods), indicating no measurable orbital precession of the disk.

• 出版日期2014-6-10
• 单位北京大学