期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 463, 期 2, 页码 2265-2272出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stw2155
关键词
comets: general; planets and satellites: dynamical evolution and stability; stars: early-type; stars: individual: (EPIC 204278916); stars: peculiar
资金
- Alexander von Humboldt Foundation
- ESA
- NASA Science Mission Directorate
- NASA [NAS5-26555]
- NASA Office of Space Science [NNX13AC07G]
- National Science Foundation [DGE-1144469]
EPIC 204278916 has been serendipitously discovered from its K2 light curve that displays irregular dimmings of up to 65 per cent for approximate to 25 consecutive days out of 78.8 d of observations. For the remaining duration of the observations, the variability is highly periodic and attributed to stellar rotation. The star is a young, low-mass (M-type) pre-main-sequence star with clear evidence of a resolved tilted disc from Atacama Large Millimeter/submillimeter Array (ALMA) observations. We examine the K2 light curve in detail and hypothesize that the irregular dimmings are caused by either a warped inner disc edge or transiting cometary-like objects in either circular or eccentric orbits. The explanations discussed here are particularly relevant for other recently discovered young objects with similar absorption dips.
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