A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00548306" target="_blank" >RIV/67985815:_____/21:00548306 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1051/0004-6361/202039455" target="_blank" >https://doi.org/10.1051/0004-6361/202039455</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202039455" target="_blank" >10.1051/0004-6361/202039455</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776

Popis výsledku v původním jazyce

We report the discovery and characterization of two transiting planets around the bright M1 V star LP 961-53 (TOI-776, J = 8.5 mag, M = 0.54 +/- 0.03 M-circle dot) detected during Sector 10 observations of the Transiting Exoplanet Survey Satellite (TESS). Combining the TESS photometry with HARPS radial velocities, as well as ground-based follow-up transit observations from the MEarth and LCOGT telescopes, for the inner planet, TOI-776 b, we measured a period of P-b = 8.25 d, a radius of R-b = 1.85 +/- 0.13 R-circle plus, and a mass of M-b = 4.0 +/- 0.9 M-circle plus, and for the outer planet, TOI-776 c, a period of P-c = 15.66 d, a radius of R-c = 2.02 +/- 0.14 R-circle plus, and a mass of M-c = 5.3 +/- 1.8 M-circle plus. The Doppler data shows one additional signal, with a period of similar to 34 d, associated with the rotational period of the star. The analysis of fifteen years of ground-based photometric monitoring data and the inspection of different spectral line indicators confirm this assumption.

Název v anglickém jazyce

A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776

Popis výsledku anglicky

We report the discovery and characterization of two transiting planets around the bright M1 V star LP 961-53 (TOI-776, J = 8.5 mag, M = 0.54 +/- 0.03 M-circle dot) detected during Sector 10 observations of the Transiting Exoplanet Survey Satellite (TESS). Combining the TESS photometry with HARPS radial velocities, as well as ground-based follow-up transit observations from the MEarth and LCOGT telescopes, for the inner planet, TOI-776 b, we measured a period of P-b = 8.25 d, a radius of R-b = 1.85 +/- 0.13 R-circle plus, and a mass of M-b = 4.0 +/- 0.9 M-circle plus, and for the outer planet, TOI-776 c, a period of P-c = 15.66 d, a radius of R-c = 2.02 +/- 0.14 R-circle plus, and a mass of M-c = 5.3 +/- 1.8 M-circle plus. The Doppler data shows one additional signal, with a period of similar to 34 d, associated with the rotational period of the star. The analysis of fifteen years of ground-based photometric monitoring data and the inspection of different spectral line indicators confirm this assumption.

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

2021

Kód důvěrnosti údajů

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

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

645

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

24

Strana od-do

A41

Kód UT WoS článku

000606855300008

EID výsledku v databázi Scopus

2-s2.0-85099057388