WASP-37b：一颗凌星于贫金属恒星周围的1.8倍木星质量系外行星
地球与行星天体物理
2015-05-19 v2
摘要
我们报告了WASP-37b的发现，这是一颗凌星的热木星，围绕一颗视星等mv = 12.7的G2型矮星运行，轨道周期为3.577471 ± 0.00001天，凌星历元T0 = 2455338.6188 ± 0.0006（HJD），凌星持续时间为0.1304 ± 0.0018天。该行星伴星的质量Mp = 1.80 ± 0.17 MJ，半径Rp = 1.16 ± 0.07 RJ，其平均密度为木星的1.15 ± 0.15倍。通过光谱分析并与恒星模型比较，我们发现宿主恒星的质量M* = 0.925 ± 0.120 Msun，半径R* = 1.003 ± 0.053 Rsun，有效温度Teff = 5800 ± 150 K，金属丰度[Fe/H] = -0.40 ± 0.12。因此，WASP-37是已知拥有凌星行星的金属丰度最低的恒星之一。
引用
@article{arxiv.1008.3096,
title = {WASP-37b: a 1.8 MJ exoplanet transiting a metal-poor star},
author = {E. K. Simpson and F. Faedi and S. C. C. Barros and D. J. A. Brown and A. Collier Cameron and L. Hebb and D. Pollacco and B. Smalley and I. Todd and O. W. Butters and G. Hebrard and J. McCormac and G. R. M. Miller and A. Santerne and R. A. Street and I. Skillen and A. H. M. J. Triaud and D. R. Anderson and J. Bento and I. Boisse and F. Bouchy and B. Enoch and C. A. Haswell and C. Hellier and S. Holmes and K. Horne and F. P. Keenan and T. A. Lister and P. F. L. Maxted and V. Moulds and C. Moutou and A. J. Norton and N. Parley and F. Pepe and D. Queloz and D. Segransan and A. M. S. Smith and H. C. Stempels and S. Udry and C. A. Watson and R. G. West and P. J. Wheatley},
journal= {arXiv preprint arXiv:1008.3096},
year = {2015}
}
备注
AJ accepted, 20 pages, 6 figures