Journal
ASTRONOMY & ASTROPHYSICS
Volume 502, Issue 1, Pages 391-394Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361/200912018
Keywords
binaries: eclipsing; planetary systems; techniques: photometric; techniques: radial velocities; techniques: spectroscopic; stars: individual: WASP-13b
Categories
Funding
- UK Science and Technology Facilities Council
- SuperWASP-N
- William Penney Fellowship
- Science and Technology Facilities Council [PP/D000955/1, ST/G002355/1, PP/D000890/1, PP/D000963/1, ST/G001987/1, PP/F000081/1, PP/F000057/1, ST/G002533/1, PP/F000065/1, ST/F002599/1, ST/F002270/1] Funding Source: researchfish
- STFC [PP/F000081/1, PP/D000963/1, PP/D000955/1, PP/D000890/1, ST/G002533/1, ST/F002599/1, ST/G002355/1, ST/G001987/1, PP/F000065/1, PP/F000057/1, ST/F002270/1] Funding Source: UKRI
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We report the discovery of WASP-13b, a low-mass M-p = 0.46(-0.05)(+0.06) 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 R-p similar to 1.06-1.21 R-J 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(-0.09)(+0.11) M-circle dot) and metallicity ([M/H] = 0.0 +/- 0.2), but is possibly older (8.5(-4.9)(+5.5) Gyr).
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