A Radial Velocity Study of the Planetary System of pi Mensae: Improved Planet Parameters for pi Mensae c and a Third Planet on a 125 Day Orbit

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F22%3A00557048" target="_blank" >RIV/67985815:_____/22:00557048 - isvavai.cz</a>

Výsledek na webu

<a href="http://hdl.handle.net/11104/0331647" target="_blank" >http://hdl.handle.net/11104/0331647</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3847/1538-3881/ac5dcb" target="_blank" >10.3847/1538-3881/ac5dcb</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A Radial Velocity Study of the Planetary System of pi Mensae: Improved Planet Parameters for pi Mensae c and a Third Planet on a 125 Day Orbit

Popis výsledku v původním jazyce

pi Men hosts a transiting planet detected by the Transiting Exoplanet Survey Satellite space mission and an outer planet in a 5.7 yr orbit discovered by radial velocity (RV) surveys. We studied this system using new RV measurements taken with the HARPS spectrograph on ESO's 3.6 m telescope, as well as archival data. We constrain the stellar RV semiamplitude due to the transiting planet, pi Men c, as K (c) = 1.21 +/- 0.12 m s(-1), resulting in a planet mass of M (c) = 3.63 +/- 0.38 M (circle plus). A planet radius of R (c) = 2.145 +/- 0.015 R (circle plus) yields a bulk density of rho (c) = 2.03 +/- 0.22 g cm(-3). The precisely determined density of this planet and the brightness of the host star make pi Men c an excellent laboratory for internal structure and atmospheric characterization studies. Our HARPS RV measurements also reveal compelling evidence for a third body, pi Men d, with a minimum mass M (d) sin i (d) = 13.38 +/- 1.35 M (circle plus) orbiting with a period of P (orb,d) = 125 days on an eccentric orbit (e (d) = 0.22). A simple dynamical analysis indicates that the orbit of pi Men d is stable on timescales of at least 20 Myr. Given the mutual inclination between the outer gaseous giant and the inner rocky planet and the presence of a third body at 125 days, pi Men is an important planetary system for dynamical and formation studies.

Název v anglickém jazyce

A Radial Velocity Study of the Planetary System of pi Mensae: Improved Planet Parameters for pi Mensae c and a Third Planet on a 125 Day Orbit

Popis výsledku anglicky

pi Men hosts a transiting planet detected by the Transiting Exoplanet Survey Satellite space mission and an outer planet in a 5.7 yr orbit discovered by radial velocity (RV) surveys. We studied this system using new RV measurements taken with the HARPS spectrograph on ESO's 3.6 m telescope, as well as archival data. We constrain the stellar RV semiamplitude due to the transiting planet, pi Men c, as K (c) = 1.21 +/- 0.12 m s(-1), resulting in a planet mass of M (c) = 3.63 +/- 0.38 M (circle plus). A planet radius of R (c) = 2.145 +/- 0.015 R (circle plus) yields a bulk density of rho (c) = 2.03 +/- 0.22 g cm(-3). The precisely determined density of this planet and the brightness of the host star make pi Men c an excellent laboratory for internal structure and atmospheric characterization studies. Our HARPS RV measurements also reveal compelling evidence for a third body, pi Men d, with a minimum mass M (d) sin i (d) = 13.38 +/- 1.35 M (circle plus) orbiting with a period of P (orb,d) = 125 days on an eccentric orbit (e (d) = 0.22). A simple dynamical analysis indicates that the orbit of pi Men d is stable on timescales of at least 20 Myr. Given the mutual inclination between the outer gaseous giant and the inner rocky planet and the presence of a third body at 125 days, pi Men is an important planetary system for dynamical and formation studies.

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

Astronomical Journal

ISSN

0004-6256

e-ISSN

1538-3881

Svazek periodika

163

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

223

Kód UT WoS článku

000786460700001

EID výsledku v databázi Scopus

2-s2.0-85129589412