Article (Scientific journals)
The EBLM Project I-Physical and orbital parameters, including spin-orbit angles, of two low-mass eclipsing binaries on opposite sides of the Brown Dwarf limit
Triaud, Amaury H. M. J.; Hebb, Leslie; Anderson, David R. et al.
2013In Astronomy and Astrophysics, 549, p. 18
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Keywords :
Astrophysics - Solar and Stellar Astrophysics; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] This paper introduces a series of papers aiming to study the dozens of low mass eclipsing binaries (EBLM), with F, G, K primaries, that have been discovered in the course of the WASP survey. Our objects are mostly single-line binaries whose eclipses have been detected by WASP and were initially followed up as potential planetary transit candidates. These have bright primaries, which facilitates spectroscopic observations during transit and allows the study of the spin-orbit distribution of F, G, K+M eclipsing binaries through the Rossiter-McLaughlin effect. Here we report on the spin-orbit angle of WASP-30b, a transiting brown dwarf, and improve its orbital parameters. We also present the mass, radius, spin-orbit angle and orbital parameters of a new eclipsing binary, J1219-39b (1SWAPJ121921.03-395125.6, TYC 7760-484-1), which, with a mass of 95 +/- 2 Mjup, is close to the limit between brown dwarfs and stars. We find that both objects orbit in planes that appear aligned with their primaries' equatorial planes. Neither primaries are synchronous. J1219-39b has a modestly eccentric orbit and is in agreement with the theoretical mass--radius relationship, whereas WASP-30b lies above it.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Triaud, Amaury H. M. J.
Hebb, Leslie
Anderson, David R.
Cargile, Phill
Collier Cameron, Andrew
Doyle, Amanda P.
Faedi, Francesca
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Gomez Maqueo Chew, Yilen
Hellier, Coel
Jehin, Emmanuel  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Maxted, Pierre
Naef, Dominique
Pepe, Francesco
Pollacco, Don
Queloz, Didier
Ségransan, Damien
Smalley, Barry
Stassun, Keivan
Udry, Stéphane
West, Richard G.
More authors (11 more) Less
Language :
English
Title :
The EBLM Project I-Physical and orbital parameters, including spin-orbit angles, of two low-mass eclipsing binaries on opposite sides of the Brown Dwarf limit
Publication date :
01 January 2013
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
549
Pages :
18
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
12 pages, 7 figures, data in appendices, A&A
Available on ORBi :
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