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The sub-Jupiter mass transiting exoplanet WASP-11b

By Richard G. West, A. Collier Cameron, L. Hebb, Y. C. Joshi, Don Pollacco, E. Simpson, I. Skillen, Eric Stempels, P. J. Wheatley, D. M. Wilson, D. R. Anderson, Samuel J. Bentley, François Bouchy, Damian Joseph Christian, B. Enoch, N. P. Gibson, G. Hébrard, Coel Hellier, B. Loeillet, M. Mayor, Pierre Maxted, Iain MacDonald, Claire Moutou, F. Pont, Didier Queloz, A. M. S. Smith, Barry Smalley, R. A. Street and S. Udry

Abstract

We report the discovery of a sub-Jupiter mass exoplanet transiting a magnitude V = 11.6 host star 1SWASP J030928.54+304024.7. A simultaneous fit to the transit photometry and radial-velocity measurements yield a planet mass $M_{\rm p}$ = 0.53 $\pm$ 0.07 ${M_{\rm J}}$, radius $R_{\rm p} = 0.91^_~{R_{\rm J}}$ and an orbital period of $3.722465^{\rm +0.000006}_$ days. The host star is an early to mid-K dwarf, with a spectral analysis yielding an effective temperature of 4800 $\pm$ 100 K and log g = 4.45 $\pm$ 0.2. It is amongst the smallest, least massive and lowest luminosity stars known to harbour a transiting exoplanet. WASP-11b is the third least strongly irradiated transiting exoplanet discovered to date, experiencing an incident flux $F_{\rm p}$ = 1.9$\times$108  erg s-1 cm-2 and having an equilibrium temperature $T_{\rm eql}$ = 960 $\pm$ 70 K

Topics: QB
Publisher: EDP Sciences
Year: 2009
OAI identifier: oai:wrap.warwick.ac.uk:2325

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Citations

  1. (2004). ApJ, 669, 1167 Bouchy, F., & The Sophie Team. 2006, in Tenth Anniversary of 51 Peg-b: Status of and prospects for hot Jupiter studies,

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