INNATE Investigating the nature and origins of exoplanets in the Neptunian desert

INNATE 调查海王星沙漠中系外行星的性质和起源

• 批准号: EP/X027562/1
• 负责人: David John Armstrong
• 金额: $ 168.67万
• 依托单位: University of Warwick
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX027562%2F1
• 关键词: INNATE; Investigating; nature; origins; exoplanets

Our knowledge of exoplanets has undergone a step change since the discovery of 51 Peg b 25 years ago. Planets are now commonplace, with most stars found to be hosting planetary systems. In the set of over 4300 planets known, trends and gaps in the distribution are seen with respect to planet size, composition and host star properties, arising from the formation and evolution processes which sculpt these worlds.A striking signature in the planet distribution is the 'Neptunian desert', a dearth of Neptune-like planets orbiting close to their host stars. Planets which arrive so close to their stars are evaporated away, or are disrupted entirely by the strong gravitational forces of the star. Yet, recently a number of planets have been discovered inside the desert, surprising expectations and highlighting a gap in our understanding. The origin of these hot Neptunes is unknown, and they present a unique opportunity to study the extreme outcomes of planet formation. Such outliers of the normal processes allow us to benchmark planetary formation theories, with many of the typical degeneracies stripped away.With this proposal, we will combine photometric and spectroscopic observations from TESS, NGTS, CORALIE, HARPS and Gaia to carry out an ambitious and comprehensive research program investigating the nature and origins of planets in the desert. (1) We will uncover the unbiased demographic properties of the in-desert planets, finding the distributions of planet mass, radius, density, internal structure and host star properties. (2) We will establish the dynamical context of these systems by determining the presence of outer companions and local density of stars (3) We will connect the measured demographics, dynamics and internal structure to wider formation and evolution theory. The combined results will transform our understanding not only of the in-desert planets but of the wider formation, structure and evolution of planetary systems.

自从25年前发现51 Peg B以来，我们对系外行星的认识发生了翻天覆地的变化。行星现在很常见，大多数恒星都被发现拥有行星系统。在已知的4300多颗行星中，分布的趋势和差距与行星的大小，组成和宿主星星属性有关，这些属性来自于塑造这些世界的形成和演化过程。行星分布的一个显著特征是“海王星沙漠”，即缺乏靠近其宿主恒星的海王星类行星。行星到达离恒星如此之近的地方会被蒸发掉，或者完全被星星的强大引力所破坏。然而，最近在沙漠中发现了一些行星，令人惊讶的期望，并突出了我们理解的差距。这些热海王星的起源是未知的，它们为研究行星形成的极端结果提供了一个独特的机会。这些正常过程的异常值使我们能够对行星形成理论进行基准测试，其中许多典型的简并被剥离。有了这个提议，我们将联合收割机TESS，NGTS，CORALIE，HARPS和盖亚的光度和光谱观测，开展一项雄心勃勃的综合研究计划，调查沙漠中行星的性质和起源。(1)我们将揭示沙漠行星的无偏人口统计特性，发现行星质量，半径，密度，内部结构和宿主星星属性的分布。(2)我们将通过确定外部伴星的存在和恒星的局部密度来建立这些系统的动力学背景（3）我们将把测量的人口统计，动力学和内部结构与更广泛的形成和演化理论联系起来。综合结果不仅将改变我们对沙漠行星的理解，而且将改变我们对行星系统更广泛的形成，结构和演化的理解。

项目成果

Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS TOI-615b, TOI-622b, and TOI-2641b

TESS 和 HARPS TOI-615b、TOI-622b 和 TOI-2641b 揭示了三颗土星质量的行星凌日 F 型恒星

• DOI: 10.1051/0004-6361/202346406
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Psaridi A

The positional probability and true host star identification of TESS exoplanet candidates

TESS系外行星候选者的位置概率和真实主星识别

• DOI: 10.1093/mnras/stad3286
• 发表时间: 2024
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Hadjigeorghiou A

The CARMENES search for exoplanets around M dwarfs Telluric absorption corrected high S/N optical and near-infrared template spectra of 382 M dwarf stars

CARMENES 搜索 M 矮星周围的系外行星 大地吸收校正了 382 M 矮星的高信噪比光学和近红外模板光谱

• DOI: 10.1051/0004-6361/202346524
• 发表时间: 2023
• 期刊: Astronomy & Astrophysics
• 影响因子: 6.5
• 作者: Nagel E

TOI-908: a planet at the edge of the Neptune desert transiting a G-type star

TOI-908：海王星沙漠边缘的一颗行星，正在穿越 G 型恒星

• DOI: 10.1093/mnras/stad1840
• 发表时间: 2023
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Hawthorn F

TOI-2498 b: A hot bloated super-neptune within the neptune desert

• DOI: 10.1093/mnras/stad1452
• 发表时间: 2023-05
• 期刊: Monthly Notices of the Royal Astronomical Society
• 影响因子: 4.8
• 作者: Ginger Frame;David J Armstrong;H. Cegla;Jorge Fern'andez Fern'andez-Jorge-Fern'andez-Fern'andez-2217018880;A. Osborn;V. Adibekyan;K. Collins;E. D. Mena;S. Giacalone;J. Kielkopf;N. Santos;S. Sousa;K. Stassun;C. Ziegler;D. Anderson;S. Barros;D. Bayliss;C. Briceño;D. Conti;C. Dressing;X. Dumusque;PedroFigueira;W. Fong;S. Gill;F. Hawthorn;J. Jenkins;E. Jensen;M. A. Keniger;D. Latham;N. Law;Jack J. Lissauer;A. Mann;L. Nielsen;H. Osborn;M. Paegert;S. Seager;R. Schwarz;A. Shporer;G. Srdoč;P. Strøm;J. Winn;P. Wheatley