WASP-34b: a near-grazing transiting sub-Jupiter-mass exoplanet in a hierarchical triple system
Data(s) |
01/02/2011
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Resumo |
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 1.22-0.08+0.11 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/Rstar)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%. Radial velocity and photometric data are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/526/A130 |
Identificador | |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Smalley , B , Anderson , D R , Collier Cameron , A , Hellier , C , Lendl , M , Maxted , P F L , Quelo , N V , Pollacco , D , Segransan , D , Smith , A M S , Southworth , J , Udry , S , Wheatley , P J , Wood , P L & Bento , J 2011 , ' WASP-34b: a near-grazing transiting sub-Jupiter-mass exoplanet in a hierarchical triple system ' Astronomy and Astrophysics , vol 526 , no. 16 , A130 . DOI: 10.1051/0004-6361/201015992 |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/3100/3103 #Astronomy and Astrophysics #/dk/atira/pure/subjectarea/asjc/1900/1912 #Space and Planetary Science |
Tipo |
article |