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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