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

Autor: A M S Smith, S N Breton, Sz Csizmadia, F Dai, D Gandolfi, R A García, A W Howard, H Isaacson, J Korth, K W F Lam, S Mathur, G Nowak, F Pérez Hernández, C M Persson, S H Albrecht, O Barragán, J Cabrera, W D Cochran, H J Deeg, M Fridlund, I Y Georgieva, E Goffo, E W Guenther, A P Hatzes, P Kabath, J H Livingston, R Luque, E Palle, S Redfield, F Rodler, L M Serrano, V Van Eylen
Přispěvatelé: European Commission, Ministerio de Ciencia e Innovación (España), National Aeronautics and Space Administration (US), Swedish National Space Agency
Rok vydání: 2021
Předmět:
Earth and Planetary Astrophysics (astro-ph.EP)
planets and satellites
FOS: Physical sciences
Astronomy and Astrophysics
Planets and satellites: detection
Planets and satellites: individual: K2-99 c
Astrophysics::Cosmology and Extragalactic Astrophysics
Planets and satellites: individual: K2-99 b
K2-99 c
Individual: K2-99 b [Planets and satellites]
Detection
Planetary systems
planets and satellites detection
K2-99 b
Astrophysics - Solar and Stellar Astrophysics
Space and Planetary Science
planets and satellites individual
Detection [Planets and satellites]
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
individual
Individual: K2-99 c [Planets and satellites]
planetary systems
Solar and Stellar Astrophysics (astro-ph.SR)
Astrophysics - Earth and Planetary Astrophysics
Zdroj: Smith, A M S, Breton, S N, Csizmadia, S, Dai, F, Gandolfi, D, García, R A, Howard, A W, Isaacson, H, Korth, J, Lam, K W F, Mathur, S, Nowak, G, Hernández, F P, Persson, C M, Albrecht, S H, Barragán, O, Cabrera, J, Cochran, W D, Deeg, H J, Fridlund, M, Georgie v a, I Y, Gof fo, E, Guenther, E W, Hatzes, A P, Kabath, P, Livingston, J H, Luque, R, Palle, E, Redfield, S, Rodler, F, Serrano, L M & Van Eylen, V 2022, ' K2-99 revisited : A non-inflated warm Jupiter, and a temperate giant planet on a 522-d orbit around a subgiant ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 4, pp. 5035-5049 . https://doi.org/10.1093/mnras/stab3497
Digital.CSIC. Repositorio Institucional del CSIC
instname
Monthly Notices of the Royal Astronomical Society, 510(4), 5035-5049
DOI: 10.48550/arxiv.2111.14660
Popis: 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 RJup⁠. 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 MJup⁠, 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. © 2022 The Author(s).
This work is done under the framework of the KESPRINT collaboration (http://www.kesprint.science). KESPRINT is an international consortium devoted to the characterization and research of exoplanets discovered with space-based missions. Based on observations made with ESO Telescopes at the La Silla Observatory (Chile) under programmes 097.C-0948(A), 099.C-0491(B), 099.C-0491(A), 0100.C-0808(A), 0101.C-0829(A), 60.A-9700(G), and 1102.C-0923(A), and the TNG telescope at Roque de Los Muchachos Observatory (Spain) under programmes A33TAC_15, A34TAC_10, OPT17A_64, A35TAC_26, OPT17B_59, CAT17B_99, CAT18A_130, OPT18A_44, A37TAC_37, OPT18B_52, and A38TAC_26. This paper includes data collected by the Kepler mission. Funding for the Kepler mission is provided by the NASA Science Mission directorate. Some of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NNX09AF08G and by other grants and contracts. This research has made use of the Exoplanet Follow-up Observation Program website, and the NASA Exoplanet Archive, which are operated by the California Institute of Technology, under contract with the National Aeronautics and Space Administration under the Exoplanet Exploration Program. The research leading to these results has received funding from the European Union Seventh Framework Programme (FP7/2013-2016) under grant agreement No. 312430 (OPTICON). This research has made use of NASA’s Astrophysics Data System, the SIMBAD data base, operated at CDS, Strasbourg, France, and the Exoplanets Encyclopaedia at exoplanet.eu. We also used ASTROPY, a community-developed core PYTHON package for Astronomy (Astropy Collaboration 2013; Price-Whelan et al. 2018). This work has made use of data from the European Space Agency (ESA) mission Gaia (https://www.cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, https://www.cosmos.esa.int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. KWFL, SC, and APH were supported by Deutsche Forschungsgemeinschaft grants HA3279/12-1 and RA714/14-1 within the DFG Schwerpunkt SPP 1992, Exploring the Diversity of Extrasolar Planets. SC is also supported by Deutsche Forschungsgemeinschaft Research Unit 2440: ‘Matter Under Planetary Interior Conditions: High Pressure Planetary and Plasma Physics’. HJD acknowledges support from the Spanish Research Agency of the Ministry of Science and Innovation (AEI-MICINN) under grant PID2019-107061GB-C66, DOI: 10.13039/501100011033. JK gratefully acknowledge the support of the Swedish National Space Agency (SNSA; DNR 2020-00104). SM acknowledges support by the Spanish Ministry of Science and Innovation with the Ramon y Cajal fellowship number RYC-2015-17697 and the grant number PID2019-107187GB-I00. SNB and RAG acknowledge the support of the PLATO CNES grant. LMS and DG gratefully acknowledge financial support from the CRT foundation under Grant No. 2018.2323 ‘Gaseous or rocky? Unveiling the nature of small worlds’. We thank Erik Petigura for his contribution to the collection and analysis of the Keck/HIRES data. Finally, we thank the referee for their careful reading of the manuscript and constructive suggestions, which resulted in improvements to this paper.
With funding from the Spanish government through the Severo Ochoa Centre of Excellence accreditation SEV-2017-0709.
Databáze: OpenAIRE
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