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The sub-Jupiter mass transiting exoplanet WASP-11b

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West, Richard G., Collier Cameron, A., Hebb, L., Joshi, Y. C., Pollacco, Don, Simpson, E., Skillen, I., Stempels, Eric, 1974-, Wheatley, P. J., Wilson, D. M. (David M.) et al.

. (2009) The sub-Jupiter mass transiting exoplanet WASP-11b. Astronomy & Astrophysics, Vol.50 (No.1). pp. 395-400. ISSN 0004-6361

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Official URL: http://dx.doi.org/10.1051/0004-6361/200810973

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.

Item Type:	Journal Article
Subjects:	Q Science > QB Astronomy
Divisions:	Faculty of Science > Physics
Library of Congress Subject Headings (LCSH):	Stars -- Motion in line of sight, Astronomical photometry, Astronomical spectroscopy, Planets -- Spectra, Planets -- Orbits
Journal or Publication Title:	Astronomy & Astrophysics
Publisher:	EDP Sciences
ISSN:	0004-6361
Official Date:	July 2009
Volume:	Vol.50
Number:	No.1
Page Range:	pp. 395-400
Identification Number:	10.1051/0004-6361/200810973
Status:	Peer Reviewed
Access rights to Published version:	Open Access
Funder:	Sixth Framework Programme (European Commission) (FP6), Optical Infrared Coordination network (OPTICON), Science and Technology Facilities Council (Great Britain) (STFC)
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URI:	http://wrap.warwick.ac.uk/id/eprint/2325