The peculiar dipping events in the disc-bearing young-stellar object EPIC 204278916

Simone Scaringi, A. Isella, C. Knigge, L. Ricci, M. Ansdell, C.F. Manara, S.A. Barenfeld, P.J. Groot, M.A. Kenworthy, Thomas Maccarone

Research output: Contribution to journalArticle

19 Scopus citations


EPIC 204278916 has been serendipitously discovered from its K2 light curve that displays irregular dimmings of up to 65 per cent for ≈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.

Original languageEnglish
Pages (from-to)2265-2272
Number of pages8
JournalDefault journal
Issue number2
StatePublished - Dec 1 2016


  • Comets: general
  • Planets and satellites: dynamical evolution and stability
  • Stars: early-type
  • Stars: individual: (EPIC 204278916)
  • Stars: peculiar


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