WASP-37b: A 1.8 M J Exoplanet Transiting a Metal-poor Star

E.K. Simpson, F. Faedi, S. C. C. Barros, D. J. A. Brown, A. Collier Cameron, L. Hebb, D. Pollacco, B. Smalley, I. Todd, O.W. Butters, G. Hebrard, J. McCormac, G.R.M. Miller, A. Santerne, R.A. Street, I. Skillen, A.H.M.J. Triaud, D.R. Anderson, J. Bento, I. BoisseF. Bouchy, B. Enoch, C.A. Haswell, C.A. Hellier, S. Holmes, K. Horne, F. P. Keenan, T.A. Lister, P.F.L. Maxted, V. Moulds, C. Moutou, A.J. Norton, N. Parley, F. Pepe, D. Queloz, D. Segransan, A.M.S. Smith, H.C. Stempels, S. Udry, C. A. Watson, R.G. West, P.J. Wheatley

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


We report on the discovery of WASP-37b, a transiting hot Jupiter orbiting an m v = 12.7 G2-type dwarf, with a period of 3.577469 ± 0.000011 d, transit epoch T 0 = 2455338.6188 ± 0.0006 (HJD; dates throughout the paper are given in Coordinated Universal Time (UTC)), and a transit duration 0.1304+0.0018 –0.0017 d. The planetary companion has a mass M p = 1.80 ± 0.17 M J and radius R p = 1.16+0.07 –0.06 R J, yielding a mean density of 1.15+0.12 –0.15 ?J. From a spectral analysis, we find that the host star has M sstarf = 0.925 ± 0.120 M sun, R sstarf = 1.003 ± 0.053 R sun, T eff = 5800 ± 150 K, and [Fe/H] = –0.40 ± 0.12. WASP-37 is therefore one of the lowest metallicity stars to host a transiting planet.
Original languageEnglish
Article number8
Pages (from-to)1-7
JournalAstronomical Journal
Early online date07 Dec 2010
Publication statusPublished - Jan 2011

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics


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