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|Title:||WASP-34b: a near-grazing transiting sub-Jupiter-mass exoplanet in a hierarchical triple system|
Anderson, D. R.
Cameron, A. C.
Maxted, P. F. L.
Triaud, A. H. M. J.
West, R. G.
Bentley, S. J.
Lister, T. A.
Smith, A. M. S.
Wheatley, P. J.
Wood, P. L.
|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%.|
|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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