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The TOI-763 system: sub-Neptunes orbiting a Sun-like star

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00537978" target="_blank" >RIV/67985815:_____/20:00537978 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/0.1093/mnras/staa2502" target="_blank" >https://doi.org/0.1093/mnras/staa2502</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1093/mnras/staa2502" target="_blank" >10.1093/mnras/staa2502</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    The TOI-763 system: sub-Neptunes orbiting a Sun-like star

  • Original language description

    We report the discovery of a planetary system orbiting TOI-763(aka CD-39 7945), a V = 10.2, high proper motion G-type dwarf star that was photometrically monitored by the TESS space mission in Sector 10. We obtain and model the stellar spectrum and find an object slightly smaller than the Sun, and somewhat older, but with a similar metallicity. Two planet candidates were found in the light curve to be transiting the star. Combining TESS transit photometry with HARPS high-precision radial velocity (RV) follow-up measurements confirm the planetary nature of these transit signals. We determine masses, radii, and bulk densities of these two planets. A third planet candidate was discovered serendipitously in the RV data. The inner transiting planet, TOI-763 b, has an orbital period of P-b = 5.6 d, a mass of M-b = 9.8 +/- 0.8M(circle dot), and a radius of R-b = 2.37 +/- 0.10 R-circle dot. The second transiting planet, TOI-763 c, has an orbital period of P-c = 12.3 d, a mass of M-c = 9.3 +/- 1.0M(circle plus), and a radius of R-c = 2.87 +/- 0.11 R-circle plus. We find the outermost planet candidate to orbit the star with a period of similar to 48 d. If confirmed as a planet, it would have a minimum mass of M-d = 9.5 +/- 1.6M(circle plus). We investigated the TESS light curve in order to search for a mono transit by planet d without success. We discuss the importance and implications of this planetary system in terms of the geometrical arrangements of planets orbiting G-type stars.

  • 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

    <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

    2020

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Monthly Notices of the Royal Astronomical Society

  • ISSN

    1365-2966

  • e-ISSN

  • Volume of the periodical

    498

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    15

  • Pages from-to

    4503-4517

  • UT code for WoS article

    000587752500112

  • EID of the result in the Scopus database

    2-s2.0-85096944457