HD 191939 revisited: New and refined planet mass determinations, and a new planet in the habitable zone
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F23%3A00568103" target="_blank" >RIV/67985815:_____/23:00568103 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0341998" target="_blank" >https://hdl.handle.net/11104/0341998</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/0004-6361/202244120" target="_blank" >10.1051/0004-6361/202244120</a>
Alternative languages
Result language
angličtina
Original language name
HD 191939 revisited: New and refined planet mass determinations, and a new planet in the habitable zone
Original language description
We report the discovery of a new non-transiting planet in the system and a refined mass determination of HD 191939 d. The new planet, HD 191939 g, has a minimum mass of 13.5 +/- 2.0 M-circle plus and a period of about 280 days. This period places the planet within the conservative habitable zone of the host star, and near a 1:3 resonance with HD 191939 e. The compilation of 362 radial velocity measurements with a baseline of 677 days from four different high-resolution spectrographs also allowed us to refine the properties of the previously known planets, including a 4.6 sigma mass determination for planet d, for which only a 2 sigma upper limit had been set until now. We confirm the previously suspected low density of HD 191939 d, which makes it an attractive target for attempting atmospheric characterisation. Overall, the planetary system consists of three sub-Neptunes interior to a Saturn-mass and a Uranus-mass planet plus a high-mass long-period companion. This particular configuration has no counterpart in the literature and makes HD 191939 an exceptional multi-planet transiting system with an unusual planet demographic worthy of future observation.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
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
669
Issue of the periodical within the volume
January
Country of publishing house
FR - FRANCE
Number of pages
20
Pages from-to
A40
UT code for WoS article
000907483400004
EID of the result in the Scopus database
2-s2.0-85145774837