The 0.5M translting exoplanet WASP-13b
/ Authors
I. Skillen, D. Pollacco, A. Cameron, L. Hebb, E. Simpson, F. Bouchy, D. Christian, N. Gibson, G. H'ebrard, Y. Joshi
and 25 more authors
B. Loeillet, B. Smalley, H. Stempels, R. Street, S. Udry, R. West, D. Anderson, S. Barros, B. Enoch, C. Haswell, C. Hellier, K. Horne, J. Irwin, F. Keenan, T. Lister, P. Maxted, M. Mayor, C. Moutou, A. Norton, N. Parley, D. Queloz, R. Ryans, I. Todd, P. Wheatley, D. Wilson
/ Abstract
We 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 < 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� ) and metallicity ([M/H] = 0.0 ± 0.2), but is possibly older (8.5 +5.5 −4.9 Gyr).
Journal: Scopus