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An asymmetric eclipse seen toward the pre-main-sequence binary system V928 Tau
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dc.contributor.author | van Dam, Dirk M. | |
dc.contributor.author | Kenworthy, Matthew A. | |
dc.contributor.author | David, Trevor J. | |
dc.contributor.author | Mamajek, Eric E. | |
dc.contributor.author | Hillenbrand, Lynne A. | |
dc.contributor.author | Cody, Ann Marie | |
dc.contributor.author | Howard, Andrew W. | |
dc.contributor.author | Isaacson, Howard | |
dc.contributor.author | Ciardi, David R. | |
dc.contributor.author | Rebull, Luisa M. | |
dc.contributor.author | Stauffer, John R. | |
dc.contributor.author | Patel, Rahul | |
dc.contributor.author | Cameron, Andrew Collier | |
dc.contributor.author | Rodriguez, Joseph E. | |
dc.contributor.author | Pojmanski, Grzegorz | |
dc.contributor.author | Gonzales, Erica J. | |
dc.contributor.author | Schlieder, Joshua E. | |
dc.contributor.author | Hambsch, Franz-Josef | |
dc.contributor.author | Dufoer, Sjoerd | |
dc.contributor.author | Vanmunster, Tonny | |
dc.contributor.author | Dubois, Franky | |
dc.contributor.author | Vanaverbeke, Siegfried | |
dc.contributor.author | Logie, Ludwig | |
dc.contributor.author | Rau, Steve | |
dc.contributor.author | Collaborators, WASP | |
dc.date.accessioned | 2021-11-26T00:36:17Z | |
dc.date.available | 2021-11-26T00:36:17Z | |
dc.date.issued | 2020-11-26 | |
dc.identifier | 271801263 | |
dc.identifier | dbc50aa3-658b-49f4-b92a-5842e4814122 | |
dc.identifier | 000592680600001 | |
dc.identifier | 85106802927 | |
dc.identifier.citation | van Dam , D M , Kenworthy , M A , David , T J , Mamajek , E E , Hillenbrand , L A , Cody , A M , Howard , A W , Isaacson , H , Ciardi , D R , Rebull , L M , Stauffer , J R , Patel , R , Cameron , A C , Rodriguez , J E , Pojmanski , G , Gonzales , E J , Schlieder , J E , Hambsch , F-J , Dufoer , S , Vanmunster , T , Dubois , F , Vanaverbeke , S , Logie , L , Rau , S & Collaborators , WASP 2020 , ' An asymmetric eclipse seen toward the pre-main-sequence binary system V928 Tau ' , Astronomical Journal , vol. 160 , no. 6 , 285 . https://doi.org/10.3847/1538-3881/abc259 | en |
dc.identifier.issn | 0004-6256 | |
dc.identifier.other | Bibtex: ISI:000592680600001 | |
dc.identifier.other | ORCID: /0000-0002-8863-7828/work/85855034 | |
dc.identifier.uri | https://hdl.handle.net/10023/24406 | |
dc.description | Funding: J.D.and E.E.M.gratefully acknowledge support from the Jet Propulsion Laboratory Exoplanetary Science Initiative and NASA award 17-K2GO6-0030. | en |
dc.description.abstract | K2 observations of the weak-lined T Tauri binary V928 Tau A and B show the detection of a single, asymmetric eclipse, which may be due to a previously unknown substellar companion eclipsing one component of the binary with an orbital period >66 days. Over an interval of about 9 hr, one component of the binary dims by around 60%, returning to its normal brightness about 5 hr later. From modeling of the eclipse shape, we find evidence that the eclipsing companion may be surrounded by a disk or a vast ring system. The modeled disk has a radius of 0.9923 ± 0.0005 R*, with an inclination of 5678 ± 003, a tilt of 4122 ± 005, an impact parameter of −0.2506 ± 0.0002 R*, and an opacity of 1.00. The occulting disk must also move at a transverse velocity of 6.637 ± 0.002 R* day−1, which, depending on whether it orbits V928 Tau A or B, corresponds to approximately 73.53 or 69.26 km s−1. A search in ground-based archival data reveals additional dimming events, some of which suggest periodicity, but no unambiguous period associated with the eclipse observed by K2. We present a new epoch of astrometry that is used to further refine the orbit of the binary, presenting a new lower bound of 67 yr, and constraints on the possible orbital periods of the eclipsing companion. The binary is also separated by 18'' (~2250 au) from the lower-mass CFHT-BD-Tau 7, which is likely associated with V928 Tau A and B. We also present new high-dispersion optical spectroscopy that we use to characterize the unresolved stellar binary. | |
dc.format.extent | 16 | |
dc.format.extent | 3300893 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomical Journal | en |
dc.subject | Planetary rings | en |
dc.subject | Pre-main sequence stars | en |
dc.subject | Astrometric binary stars | en |
dc.subject | Eclipses | en |
dc.subject | Substellar companion stars | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | 3rd-DAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | An asymmetric eclipse seen toward the pre-main-sequence binary system V928 Tau | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | https://doi.org/10.3847/1538-3881/abc259 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | https://arxiv.org/abs/2010.11199 | en |
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