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.
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.
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Kenworthy, M.A.
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Knigge, C.
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Maccarone, T.J.
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Ricci, L.
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Ansdell, M.
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1 December 2016
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.
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Kenworthy, M.A.
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Knigge, C.
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Maccarone, T.J.
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Ricci, L.
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Ansdell, M.
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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), .
(doi:10.1093/mnras/stw2155).
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.
Text
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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
Identifiers
Local EPrints ID: 402251
URI: http://eprints.soton.ac.uk/id/eprint/402251
ISSN: 1365-2966
PURE UUID: 13b808e6-8985-40e2-973f-71389a7d4b81
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Date deposited: 03 Nov 2016 16:55
Last modified: 20 Aug 2025 22:57
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Contributors
Author:
S. Scaringi
Author:
C.F. Manara
Author:
S.A. Barenfeld
Author:
P.J. Groot
Author:
A. Isella
Author:
M.A. Kenworthy
Author:
T.J. Maccarone
Author:
L. Ricci
Author:
M. Ansdell
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