WASP-3b: a strongly irradiated transiting gas-giant planet
WASP-3b: a strongly irradiated transiting gas-giant planet
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DOI：
10.1111/j.1365-2966.2008.12939.x
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发表时间：
2007-11
影响因子：
4.8
通讯作者：
D. Pollacco;I. Skillen;A. Cameron;B. Loeillet;H. C. Stempels;F. Bouchy;N. Gibson;L. Hebb;G. Hébrard;Y. Joshi;I. McDonald;B. Smalley;Alexis M. S. Smith;R. Street;R. Street;S. Udry;R. West;D. Wilson;P. Wheatley;S. Aigrain;Khalid Al-Subai;C. Benn;V. Bruce;D. Christian;W. Clarkson;B. Enoch;A. Evans;A. Fitzsimmons;C. Haswell;C. Hellier;S. Hickey;S. Hodgkin;K. Horne;M. Hrudkova;J. Irwin;S. Kane;F. Keenan;T. Lister;T. Lister;T. Lister;P. Maxted;M. Mayor;C. Moutou;A. Norton;J. Osborne;N. Parley;F. Pont;D. Queloz;R. Ryans;E. Simpson
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文献类型：
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作者：
D. Pollacco;I. Skillen;A. Cameron;B. Loeillet;H. C. Stempels;F. Bouchy;N. Gibson;L. Hebb;G. Hébrard;Y. Joshi;I. McDonald;B. Smalley;Alexis M. S. Smith;R. Street;R. Street;S. Udry;R. West;D. Wilson;P. Wheatley;S. Aigrain;Khalid Al-Subai;C. Benn;V. Bruce;D. Christian;W. Clarkson;B. Enoch;A. Evans;A. Fitzsimmons;C. Haswell;C. Hellier;S. Hickey;S. Hodgkin;K. Horne;M. Hrudkova;J. Irwin;S. Kane;F. Keenan;T. Lister;T. Lister;T. Lister;P. Maxted;M. Mayor;C. Moutou;A. Norton;J. Osborne;N. Parley;F. Pont;D. Queloz;R. Ryans;E. Simpson
我们报告了WASP-3b的发现，这是WASP和SOPHIE合作发现的第三颗凌日系外行星。WASP-3b每1.846 834 ± 0.000 002天经过其宿主星星USNO-B1.0 1256−0285133。我们的高精度径向速度测量呈现出行星质量伴星的振幅特征变化，并与光变曲线同相。自适应光学成像没有显示附近有伴星的证据，线平分线分析排除了微弱的，未解决的双星和恒星活动作为径向速度变化的原因。对主星星星进行了初步的光谱分析，发现它的Teff = 6400 ± 100 K，log g = 4.25 ± 0.05，这表明它很可能是一颗光谱型为F7-8V的未演化主序星星星。我们对凌日测光和宿主反射运动的同步建模使我们得出WASP-3b的质量为1.76 + 0.08 −0.14 MJ，半径为1.31 + 0.07 −0.14 RJ。与宿主星星的距离和相对温度表明，WASP-3 b是已知最热的系外行星之一，因此有可能对系外行星大气模型施加严格的限制。
We report the discovery of WASP-3b, the third transiting exoplanet to be discovered by the WASP and SOPHIE collaboration. WASP-3b transits its host star USNO-B1.0 1256−0285133 every 1.846 834 ± 0.000 002 d. Our high-precision radial velocity measurements present a variation with amplitude characteristic of a planetary-mass companion and in phase with the light curve. Adaptive optics imaging shows no evidence for nearby stellar companions, and line-bisector analysis excludes faint, unresolved binarity and stellar activity as the cause of the radial velocity variations. We make a preliminary spectroscopic analysis of the host star and find it to have T eff = 6400 ± 100 K and log g = 4.25 ± 0.05 which suggests it is most likely an unevolved main-sequence star of spectral type F7-8V. Our simultaneous modelling of the transit photometry and reflex motion of the host leads us to derive a mass of 1.76 +0.08 −0.14 MJ and radius 1.31 +0.07 −0.14 RJ for WASP-3b. The proximity and relative temperature of the host star suggests that WASP-3b is one of the hottest exoplanets known, and thus has the potential to place stringent constraints on exoplanet atmospheric models.