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arXiv 0901.4705astro-ph.EP
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WASP-6 b的发现和表征,一个膨胀的亚木星质量行星过境太阳型恒星

Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star

M. Gillon, D. R. Anderson, A. H. M. J. Triaud, C. Hellier, P. F. L. Maxted, D. Pollaco, D. Queloz, B. Smalley, R. G. West, D. M. Wilson, S. J. Bentley, A. Colli… 展开作者

M. Gillon, D. R. Anderson, A. H. M. J. Triaud, C. Hellier, P. F. L. Maxted, D. Pollaco, D. Queloz, B. Smalley, R. G. West, D. M. Wilson, S. J. Bentley, A. Collier Cameron, B. Enoch, L. Hebb, K. Horne, J. Irwin, Y. C. Joshi, T. A. Lister, M. Mayor, F. Pepe, N. Parley, D. Segransan, S. Udry, P. J. Wheatley

摘要:

我们报告发现了WASP-6 b,一颗膨胀的亚木星质量行星,每3.3610060 +0.0000022-0.0000035天经过一颗V=11.9的轻度贫金属太阳型恒星。综合分析WASP测光、高精度跟踪凌日测光和视向速度,得到行星质量M_p = 0.503 + 0.019 - 0.038 M_jup,半径R_p = 1.224 + 0.051 - 0.052 R_jup,密度rho_p = 0.27 +-0.05 rho_jup。主星的质量和半径分别为M_s = 0.88 + 0.05 - 0.08 M_sun和R_s = 0.870 + 0.025 - 0.036 R_sun。我们测量到的非零轨道偏心率e = 0.054 + 0.018 - 0.015表明,这颗行星在大约1 Gyr前经历了一次大规模的潮汐加热,这可能导致了它的膨胀半径。在凌日期间获得的高精度径向速度使我们能够测量恒星自旋和轨道轴之间的天空投影角β = 11 + 14 - 18度。除了类似的已发表的测量,这一结果有利于一个占主导地位的迁移机制的基础上与原行星盘潮汐相互作用。

英文摘要:

We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060 +0.0000022-0.0000035 days a mildly metal-poor solar-type star of magnitude V=11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass M_p = 0.503 +0.019-0.038 M_jup and radius R_p = 1.224 +0.051-0.052 R_jup, resulting in a density rho_p = 0.27 +-0.05 rho_jup. The mass and radius for the host star are M_s = 0.88 +0.05-0.08 M_sun and R_s = 0.870 +0.025-0.036 R_sun. The non-zero orbital eccentricity e = 0.054 +0.018-0.015 that we measure suggests that the planet underwent a massive tidal heating ~1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis Beta = 11 +14-18 deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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