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

The peculiar dipping events in the disc-bearing young-stellar object EPIC 204278916
The peculiar dipping events in the disc-bearing young-stellar object EPIC 204278916
EPIC 204278916 has been serendipitously discovered from its K2 light curve that displays irregular dimmings of up to 65 percent 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.
0035-8711
2265-2272
Scaringi, S.
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Manara, C.F.
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Barenfeld, S.A.
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Groot, P.J.
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Isella, A.
dc19e6da-3425-446d-a744-072e4a43aac0
Kenworthy, M.A.
289f06ee-939b-4fef-b735-e71568471c6f
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Maccarone, T.J.
5d8ee27f-a174-424c-b3b7-a6739bfeea50
Ricci, L.
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Ansdell, M.
b9a37e3d-50c8-4ca2-ab4b-9ad55e1094b1
Scaringi, S.
5a05d9eb-9bfb-455a-abb1-b1ed3229f977
Manara, C.F.
15a0b136-5a71-44c7-9187-9d41f7daab9d
Barenfeld, S.A.
4b448446-d470-4c53-90e6-d074289300ff
Groot, P.J.
d02fe217-fa60-4fb0-8b7e-cbb6a34c9c4d
Isella, A.
dc19e6da-3425-446d-a744-072e4a43aac0
Kenworthy, M.A.
289f06ee-939b-4fef-b735-e71568471c6f
Knigge, C.
ac320eec-631a-426e-b2db-717c8bf7857e
Maccarone, T.J.
5d8ee27f-a174-424c-b3b7-a6739bfeea50
Ricci, L.
141dc2e4-9916-42fb-afc0-74ebc81a0bd0
Ansdell, M.
b9a37e3d-50c8-4ca2-ab4b-9ad55e1094b1

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. (2016) The peculiar dipping events in the disc-bearing young-stellar object EPIC 204278916. Monthly Notices of the Royal Astronomical Society, 463 (2), 2265-2272. (doi:10.1093/mnras/stw2155).

Record type: Article

Abstract

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

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Accepted/In Press date: 23 August 2016
e-pub ahead of print date: 26 August 2016
Published date: 1 December 2016
Organisations: Astronomy Group

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Local EPrints ID: 402251
URI: http://eprints.soton.ac.uk/id/eprint/402251
ISSN: 0035-8711
PURE UUID: 13b808e6-8985-40e2-973f-71389a7d4b81

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Date deposited: 03 Nov 2016 16:55
Last modified: 16 Dec 2019 19:38

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