Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F21%3A00549999" target="_blank" >RIV/67985815:_____/21:00549999 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0325874" target="_blank" >http://hdl.handle.net/11104/0325874</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1093/mnras/stab2143" target="_blank" >10.1093/mnras/stab2143</a>
Alternative languages
Result language
angličtina
Original language name
Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley
Original language description
We report on precise Doppler measurements of L231-32 (TOI-270), a nearby M dwarf (d = 22pc, M-star = 0.39 M-circle dot, R-star = 0.38 R-circle dot), which hosts three transiting planets that were recently discovered using data from the Transiting Exoplanet Survey Satellite (TESS). The three planets are 1.2, 2.4, and 2.1 times the size of Earth and have orbital periods of 3.4, 5.7, and 11.4 d. We obtained 29 high-resolution optical spectra with the newly commissioned Echelle Spectrograph for Rocky Exoplanet and Stable Spectroscopic Observations (ESPRESSO) and 58 spectra using the High Accuracy Radial velocity Planet Searcher (HARPS). From these observations, we find the masses of the planets to be 1.58 +/- 0.26, 6.15 +/- 0.37, and 4.78 +/- 0.43 M-circle plus, respectively.
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
2021
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
0035-8711
e-ISSN
1365-2966
Volume of the periodical
507
Issue of the periodical within the volume
2
Country of publishing house
GB - UNITED KINGDOM
Number of pages
20
Pages from-to
2154-2173
UT code for WoS article
000697380800040
EID of the result in the Scopus database
2-s2.0-85115835746