2016MNRAS.463.2265S

Query : 2016MNRAS.463.2265S

2016MNRAS.463.2265S - Mon. Not. R. Astron. Soc., 463, 2265-2272 (2016/December-1)

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

SCARINGI S., MANARA C.F., BARENFELD S.A., GROOT P.J., ISELLA A., KENWORTHY M.A., KNIGGE C., MACCARONE T.J., RICCI L. and ANSDELL M.

Abstract (from CDS):

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.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): comets: general - planets and satellites: dynamical evolution and stability - stars: early-type - stars: individual: (EPIC 204278916) - stars: peculiar - stars: peculiar

CDS comments: In Chap 3.1 : EPIC 204530045 is a misprint for EPIC 204530046.

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 ASAS J140748-3945.7 Y*O 14 07 47.9297625720 -39 45 42.767059968   13.56 12.31 11.91 10.92 K5IVe 84 0
2 HD 142527 Ae* 15 56 41.8882637904 -42 19 23.248281828   9.04 8.34     F6III 741 1
3 [PBB2002] USco J160207.5-225746 Or* 16 02 07.5766784976 -22 57 46.882812240           M1e 59 0
4 2MASS J16105011-2157481 Or* 16 10 50.1111816912 -21 57 48.294262800           M4.25 23 0
5 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
6 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1497 1
7 GSC 03162-00665 Er* 20 06 15.4526521026 +44 27 24.790869158   12.82 12.01 11.75   F3V 159 0

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