TOI-2498 b: A hot bloated super-neptune within the neptune desert-猫眼课题宝

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

通讯作者：

中科院分区：

物理与天体物理2区

文献类型：

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

我们提出了一个过境热，膨胀的超海王星使用TESS和LCOGT测光和径向速度测量HARPS的发现和确认。宿主星星TOI-2498是一颗V = 11.2，G型（Teff = 5905 ± 12 K）类太阳星星，质量为1.12 ± 0.02 M，半径为1.26 ± 0.04 R。行星TOI-2498 B以3.7天的周期围绕星星运行，半径为6.1 ± 0.3 R，质量为35 ± 4 M。这导致密度为0.86 ± 0.25 g cm-3。TOI-2498 B位于海王星沙漠的边缘;这是一个质量周期参数空间区域，其中似乎缺乏行星。因此，TOI-2498 B是一个有趣的研究案例，可以进一步了解海王星沙漠的起源和边界。通过模拟蒸发的历史，我们确定在其3.6 Gyr的寿命中，TOI-2498 B可能通过光蒸发从土星大小的行星减少到目前的半径。此外，TOI-2498 B是未来大气研究的潜在候选者，用于使用高分辨率在光学中搜索水或钠等物质，以及使用JWST在红外中搜索碳基分子。

We present the discovery and confirmation of a transiting hot, bloated Super-Neptune using photometry from TESS and LCOGT and radial velocity measurements from HARPS. The host star TOI-2498 is a V = 11.2, G-type (Teff = 5905 ± 12 K) solar-like star with a mass of 1.12 ± 0.02 M⊙ and a radius of 1.26 ± 0.04 R⊙. The planet, TOI-2498 b, orbits the star with a period of 3.7 days, has a radius of 6.1 ± 0.3 R⊕, and a mass of 35 ± 4 M⊕. This results in a density of 0.86 ± 0.25 g cm-3. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its ∼3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high-resolution, and for carbon based molecules in the infra-red using JWST.

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

文献摘要

相似文献