Please use this identifier to cite or link to this item:
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
Authors: Triaud, A. H. M. J.
Hebb, L.
Anderson, D. R.
Cargile, P.
Cameron, A. C.
Doyle, A. P.
Faedi, F.
Gillon, M.
Chew, Y. G. M.
Hellier, C.
Jehin, E.
Maxted, P.
Naef, D.
Pepe, F.
Pollacco, D.
Queloz, D.
Segransan, D.
Smalley, B.
Stassun, K.
Udry, S.
West, Richard Granville
First Published: 7-Dec-2012
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2013, 549, A18
Abstract: 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 have projected spin-orbit angles aligned with their primaries’ rotation. 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.
DOI Link: 10.1051/0004-6361/201219643
ISSN: 0004-6361
eISSN: 1432-0746
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © ESO, 2012. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

Files in This Item:
File Description SizeFormat 
aa19643-12.pdfPublished (publisher PDF)2.56 MBAdobe PDFView/Open

Items in LRA are protected by copyright, with all rights reserved, unless otherwise indicated.