The 0.5 M<sub>J</sub> transiting exoplanet WASP-13b
- Skillen, I.
- Pollacco, D.
- Cameron, A. Collier
- Hebb, L.
- Simpson, E.
- Bouchy, F.
- Christian, D.J.
- Gibson, N.P.
- Hebrard, 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
We report the discovery of WASP-13b, a low-mass MP = 0.46+0.06-0.05 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)
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