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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00555908" target="_blank" >RIV/67985815:_____/22:00555908 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1093/mnras/stab3497" target="_blank" >https://doi.org/10.1093/mnras/stab3497</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1093/mnras/stab3497" target="_blank" >10.1093/mnras/stab3497</a>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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-circle dot. 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 R-b = 1.06 +/- 0.01 R-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 M(c)sin i(c) = 8.4 +/- 0.2 M-Jup, and an eccentric orbit (e(c) = 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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-circle dot. 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 R-b = 1.06 +/- 0.01 R-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 M(c)sin i(c) = 8.4 +/- 0.2 M-Jup, and an eccentric orbit (e(c) = 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Monthly Notices of the Royal Astronomical Society

ISSN

0035-8711

e-ISSN

1365-2966

Svazek periodika

510

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

5035-5049

Kód UT WoS článku

000764893800004

EID výsledku v databázi Scopus

2-s2.0-85125025977