The GAPS programme at TNG: XLIX. TOI-5398, the youngest compact multi-planet system composed of an inner sub-Neptune and an outer warm Saturn
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00583668" target="_blank" >RIV/67985815:_____/24:00583668 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0353353" target="_blank" >https://hdl.handle.net/11104/0353353</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202347472" target="_blank" >10.1051/0004-6361/202347472</a>
Alternative languages
Result language
angličtina
Original language name
The GAPS programme at TNG: XLIX. TOI-5398, the youngest compact multi-planet system composed of an inner sub-Neptune and an outer warm Saturn
Original language description
We report the confirmation of TOI-5398, the youngest known compact multi-planet system composed of a hot sub-Neptune (TOI-5398 c, P-c = 4.77271 days) orbiting interior to a short-period Saturn (TOI-5398 b, P-b = 10.590547 days) planet, both transiting around a 650 +/- 150 Myr G-type star. As part of the Global Architecture of Planetary Systems (GAPS) Young Object project, we confirmed and characterised this compact system, measuring the radius and mass of both planets, thus constraining their bulk composition. Using multi-dimensional Gaussian processes, we simultaneously modelled stellar activity and planetary signals from the Transiting Exoplanet Survey Satellite (TESS) Sector 48 light curve and our High Accuracy Radial velocity Planet Searcher (HARPS-N) radial velocity (RV) time series. We confirmed the planetary nature of both planets, TOI-5398 b and TOI-5398 c, and obtained a precise estimation of their stellar parameters.
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
<a href="/en/project/LTT20015" target="_blank" >LTT20015: PLATOSpec ground based support of space missions PLATO and TESS - new Czech spectrograph in collaboration with European Southern Observatory</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2024
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
682
Issue of the periodical within the volume
February
Country of publishing house
FR - FRANCE
Number of pages
29
Pages from-to
A129
UT code for WoS article
001161915800006
EID of the result in the Scopus database
2-s2.0-85185497423