The 0.5M<SUB>J</SUB> transiting exoplanet WASP-13b
- Skillen, I.
- Pollacco, D.
- Collier Cameron, A.
- Hebb, L.
- Simpson, E.
- Bouchy, F.
- Christian, D. J.
- Gibson, N. P.
- Hébrard, G.
- Joshi, Y. C.
- Loeillet, B.
- Smalley, B.
- Stempels, H. C.
- Street, R. A.
- Udry, S.
- West, R. G.
- Anderson, D. R.
- Barros, S. C. C.
- Enoch, B.
- Haswell, C. A.
- Hellier, C.
- Horne, K.
- Irwin, J.
- Keenan, F. P.
- Lister, T. A.
- Maxted, P.
- Mayor, M.
- Moutou, C.
- Norton, A. J.
- Parley, N.
- Queloz, D.
- Ryans, R.
- Todd, I.
- Wheatley, P. J.
- Wilson, D. M.
DOIAbstract
International audienceWe report the discovery of WASP-13b, a low-mass Mp = 0.46 + 0.06 - 0.05 MJ transiting exoplanet with an orbital period of 4.35298 ± 0.00004 days. The transit has a depth of 9 mmag, and although our follow-up photometry does not allow us to constrain the impact parameter well (0 p 1.06-1.21 RJ the location of WASP-13b in the mass-radius plane is nevertheless consistent with H/He-dominated, irradiated, low core mass and core-free theoretical models. The G1V host star is similar to the Sun in mass (M* = 1.03+0.11_ {- 0.09} M⊙) and metallicity ([M/H] = 0.0±0.2), but is possibly older (8.5+ 5.5 _-4.9 Gyr). The SuperWASP and JGT differential photometry, and SOPHIE radial velocities of WASP-13 are only available in electronic...
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