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## The 0.5MJ transiting exoplanet WASP-13b

### Abstract

We report the discovery of WASP-13b, a low-mass $M_{\rm p} = 0.46 ^_~M_J$ transiting exoplanet with an orbital period of 4.35298 $\pm$ 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 $R_{\rm p}$ ~ 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 $(M__ ~M_{\odot})$ and metallicity ([M/H] = 0.0$\pm$0.2), but is possibly older ( $8.5^_{\rm -4.9}$ Gyr)

Topics: QB
Publisher: EDP Sciences
Year: 2009
OAI identifier: oai:wrap.warwick.ac.uk:2296

### Citations

1. de la
2. Group of Telescopes, Apartado de Correos 321,
3. Observatory, 6740 Cortona Dr. Suite 102,
4. (2004). The CoRoT Team 2007, in EXOPLANETS: Detection, Formation and Dynamics,

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