A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Astronomy & Astrophysics
ISSN
0004-6361
e-ISSN
1432-0746
Volume of the periodical
645
Issue of the periodical within the volume
January
Country of publishing house
FR - FRANCE
Number of pages
24
Pages from-to
A41
UT code for WoS article
000606855300008
EID of the result in the Scopus database
2-s2.0-85099057388