K2-99 revisited: a non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant

Author:

Smith A M S1ORCID,Breton S N2,Csizmadia Sz1ORCID,Dai F3,Gandolfi D4ORCID,García R A2,Howard A W5,Isaacson H6,Korth J7,Lam K W F81,Mathur S910,Nowak G910ORCID,Pérez Hernández F910,Persson C M11,Albrecht S H12,Barragán O13,Cabrera J1,Cochran W D14,Deeg H J910ORCID,Fridlund M1115ORCID,Georgieva I Y11,Goffo E416,Guenther E W16,Hatzes A P16,Kabath P17ORCID,Livingston J H18ORCID,Luque R19,Palle E910,Redfield S20ORCID,Rodler F21,Serrano L M4ORCID,Van Eylen V22ORCID

Affiliation:

1. Department of Extrasolar Planets and Atmospheres, Institute of Planetary Research, German Aerospace Center (DLR), Rutherfordstraße 2, D-12489 Berlin, Germany

2. AIM, CEA, CNRS, Université Paris-Saclay, Université Paris Diderot, Sorbonne Paris Cité, F-91191 Gif-sur-Yvette, France

3. Division of Geological and Planetary Sciences, 1200 E California Blvd, Pasadena, CA 91125, USA

4. Dipartimento di Fisica, Universitá di Torino, Via P. Giuria 1, I-10125, Torino, Italy

5. Department of Astronomy, California Institute of Technology, 1200 E California Blvd., Pasadena, CA 91125, USA

6. Department of Astronomy, University of California Berkeley, 501 Campbell Hall, Berkeley, CA 94709, USA

7. Department of Space, Earth and Environment, Astronomy and Plasma Physics, Chalmers University of Technology, 412 96 Gothenburg, Sweden

8. Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, D-10623 Berlin, Germany

9. Instituto de Astrofísica de Canarias (IAC), D-38205 La Laguna, Tenerife, Spain

10. Departamento de Astrofísica, Universidad de La Laguna (ULL), D-38206 La Laguna, Tenerife, Spain

11. Department of Space, Earth and Environment, Onsala Space Observatory, Chalmers University of Technology, SE-439 92, Onsala, Sweden

12. Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C, Denmark

13. Sub-department of Astrophysics, Department of Physics, University of Oxford, Oxford, OX1 3RH, UK

14. Center for Planetary Systems Habitability and McDonald Observatory, The University of Texas at Austin, Austin, TX 78712, USA

15. Leiden Observatory, University of Leiden, PO Box 9513, 2300 RA, Leiden, the Netherlands

16. Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg, Germany

17. Astronomical Institue, Czech Academy of Sciences, Fričova 298, 25165, Ondřejov, Czechia

18. Department of Astronomy, University of Tokyo, 7-3-1 Hongo, Bunkyo-ky, Tokyo 113-0033, Japan

19. Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía s/n, D-18008 Granada, Spain

20. Astronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USA

21. European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago, Chile

22. Mullard Space Science Laboratory, University College London, Holmbury St Mary, Dorking, Surrey RH5 6NT, UK

Abstract

ABSTRACT We report new photometric and spectroscopic observations of the K2-99 planetary system. Asteroseismic analysis of the short-cadence light curve from K2’s Campaign 17 allows us to refine the stellar properties. We find K2-99 to be significantly smaller than previously thought, with R⋆ = 2.55 ± 0.02 R⊙. The new light curve also contains four transits of K2-99 b, which we use to improve our knowledge of the planetary properties. We find the planet to be a non-inflated warm Jupiter, with Rb = 1.06 ± 0.01 $\mathrm{R_{\rm Jup}}$. 60 new radial velocity measurements from HARPS, HARPS-N, and HIRES enable the determination of the orbital parameters of K2-99 c, which were previously poorly constrained. We find that this outer planet has a minimum mass Mcsin ic = 8.4 ± 0.2 $\mathrm{M_{\rm Jup}}$, and an eccentric orbit (ec = 0.210 ± 0.009) with a period of 522.2 ± 1.4 d. Upcoming TESS observations in 2022 have a good chance of detecting the transit of this planet, if the mutual inclination between the two planetary orbits is small.

Funder

ESO

Deutsche Forschungsgemeinschaft

Ministry of Science and Innovation

Swedish National Space Agency

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Cited by 5 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3