Details

Autor(en) / Beteiligte

• 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.

Titel

The 0.5MJ transiting exoplanet WASP-13b

Ist Teil von

• Astronomy and astrophysics (Berlin), 2009-07, Vol.502 (1), p.391-394

Ort / Verlag

Les Ulis: EDP Sciences

Erscheinungsjahr

2009

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• We report the discovery of WASP-13b, a low-mass $ M_{\rm p} = 0.46 ^{+ 0.06 }_{- 0.05}~M_J$ 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 < b < 0.46), with radius in the range Rp ~ 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 $(M_{*} = 1.03^{+0.11}_ {- 0.09}~M_{\odot})$ and metallicity ([M/H] = 0.0±0.2), but is possibly older ($8.5^{+ 5.5 }_{\rm -4.9}$ Gyr).