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arXiv 1706.01892astro-ph.EP
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三人公司:在明亮的HD 3167系统中有一个额外的非凌日超级地球,以及所有三颗行星的质量。

Three's Company: An additional non-transiting super-Earth in the bright HD 3167 system, and masses for all three planets

Jessie L. Christiansen, Andrew Vanderburg, Jennifer Burt, B. J. Fulton, Konstantin Batygin, Björn Benneke, John M. Brewer, David Charbonneau, David R. Ciardi, A… 展开作者

Jessie L. Christiansen, Andrew Vanderburg, Jennifer Burt, B. J. Fulton, Konstantin Batygin, Björn Benneke, John M. Brewer, David Charbonneau, David R. Ciardi, Andrew Collier Cameron, Jeffrey L. Coughlin, Ian J. M. Crossfield, Courtney Dressing, Thomas P. Greene, Andrew W. Howard, David W. Latham, Emilio Molinari, Annelies Mortier, Fergal Mullally, Francesco Pepe, Ken Rice, Evan Sinukoff, Alessandro Sozzetti, Susan E. Thompson, Stéphane Udry, Steven S. Vogt, Travis S. Barman, Natasha E. Batalha, Francois Bouchy, Lars A. Buchhave, R. Paul Butler, Rosario Cosentino, Trent J. Dupuy, David Ehrenreich, Aldo Fiorenzano, Brad M. S. Hansen, Thomas Henning, Lea Hirsch, Bradford P. Holden, Howard T. Isaacson, John A. Johnson, Heather A. Knutson, Molly Kosiarek, Mercedes López-Morales, Christophe Lovis, Luca Malavolta, Michel Mayor, Giuseppina Micela, Fatemeh Motalebi, Erik Petigura, David F. Phillips, Giampaolo Piotto, Leslie A. Rogers, Dimitar Sasselov, Joshua E. Schlieder, Damien Ségransan, Christopher A. Watson, Lauren M. Weiss

摘要:

HD 3167是一颗明亮的恒星(V = 8.9),由NASA的K2任务(EPIC 220383386)观测到,拥有两颗小的短周期凌日行星。在这里,我们提出了一个多站点,多仪器径向速度运动的结果,以表征HD 3167系统。对于HD 3167 b来说,过境行星的质量为5.02+/-0.38 MEarth,这是一个可能由岩石组成的热超级地球(rho_b = 5.60 ± 2.15-1.43 g/cm ~ 3),HD 3167 c为9.80 ± 1.30-1.24 MEarth,一个温暖的亚海王星,可能有大量的挥发性补充物质(rho_c = 1.97+0.94-0.59 g/cm^3)。我们探索了大气成分分析的可能性,并确定行星c适合于透射光谱测量,行星b是一个潜在的热发射目标。我们探测到第三颗非凌日行星HD 3167 d,周期为8.509+/-0.045 d(介于行星b和c之间),最小质量为6.90+/-0.71 MEarth。我们能够限制行星d与行星b和c的相互倾角:我们排除了低于1.3度的相互倾角,因为我们没有观察到行星d的凌日。从1.3度到40度,有一些观察几何学会引起特殊的节点配置,导致行星d在一段时间内不会过境。从40度到60度,Kozai-Lidov振荡增加了系统的不稳定性,但它可以保持稳定长达1亿年。超过60度,系统就不稳定了。HD 3167有望成为一个富有成效的系统,用于进一步研究,并预览即将到来的NASA TESS任务中预期的许多令人兴奋的系统。

英文摘要:

HD 3167 is a bright (V = 8.9), nearby K0 star observed by the NASA K2 mission (EPIC 220383386), hosting two small, short-period transiting planets. Here we present the results of a multi-site, multi-instrument radial velocity campaign to characterize the HD 3167 system. The masses of the transiting planets are 5.02+/-0.38 MEarth for HD 3167 b, a hot super-Earth with a likely rocky composition (rho_b = 5.60+2.15-1.43 g/cm^3), and 9.80+1.30-1.24 MEarth for HD 3167 c, a warm sub-Neptune with a likely substantial volatile complement (rho_c = 1.97+0.94-0.59 g/cm^3). We explore the possibility of atmospheric composition analysis and determine that planet c is amenable to transmission spectroscopy measurements, and planet b is a potential thermal emission target. We detect a third, non-transiting planet, HD 3167 d, with a period of 8.509+/-0.045 d (between planets b and c) and a minimum mass of 6.90+/-0.71 MEarth. We are able to constrain the mutual inclination of planet d with planets b and c: we rule out mutual inclinations below 1.3 degrees as we do not observe transits of planet d. From 1.3-40 degrees, there are viewing geometries invoking special nodal configurations which result in planet d not transiting some fraction of the time. From 40-60 degrees, Kozai-Lidov oscillations increase the system's instability, but it can remain stable for up to 100Myr. Above 60 degrees, the system is unstable. HD 3167 promises to be a fruitful system for further study and a preview of the many exciting systems expected from the upcoming NASA TESS mission.

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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