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Title: WASP-34b: a near-grazing transiting sub-Jupiter-mass exoplanet in a hierarchical triple system
Authors: Smalley, B.
Anderson, D. R.
Cameron, A. C.
Hellier, C.
Lendl, M.
Maxted, P. F. L.
Queloz, D.
Triaud, A. H. M. J.
West, R. G.
Bentley, S. J.
Enoch, B.
Gillon, M.
Lister, T. A.
Pepe, F.
Pollacco, D.
Segransan, D.
Smith, A. M. S.
Southworth, J.
Udry, S.
Wheatley, P. J.
Wood, P. L.
Bento, J.
First Published: 1-Feb-2011
Publisher: EDP Sciences for European Southern Observatory (ESO)
Citation: Astronomy & Astrophysics, 2011, 526
Abstract: We report the discovery of WASP-34b, a sub-Jupiter-mass exoplanet transiting its 10.4-magnitude solar-type host star (1SWASP J110135.89-235138.4; TYC 6636-540-1) every 4.3177 days in a slightly eccentric orbit (e = 0.038 ± 0.012). We find a planetary mass of 0.59 ± 0.01 MJup and radius of RJup. There is a linear trend in the radial velocities of 55 ± 4 m s-1 y-1 indicating the presence of a long-period third body in the system with a mass ≳0.45 MJup at a distance of ≳1.2 AU from the host star. This third-body is either a low-mass star, a white dwarf, or another planet. The transit depth ((RP/R∗)2 = 0.0126) and high impact parameter (b = 0.90) suggest that this could be the first known transiting exoplanet expected to undergo grazing transits, but with a confidence of only ~80%.
DOI Link: 10.1051/0004-6361/201015992
ISSN: 0004-6361
Version: Publisher Version
Status: Peer-reviewed
Type: Journal Article
Rights: Copyright © 2011 ESO. Reproduced with permission from Astronomy & Astrophysics, © ESO.
Appears in Collections:Published Articles, Dept. of Physics and Astronomy

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