Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley
Uložené v:
| Názov: | Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley |
|---|---|
| Autori: | Van Eylen, Vincent, Astudillo-Defru, N., Bonfils, X., Livingston, J.H., Hirano, T., Luque, R., Lam, K. W.F., Justesen, A.B., Winn, J. N., Gandolfi, D., Nowak, G., Palle, Enric, Albrecht, Simon, Dai, Fei, Campos Estrada, B., Owen, James E., Foreman-Mackey, D., Fridlund, Malcolm, 1952, Korth, Judith, 1987, Mathur, S., Forveille, T., Mikal-Evans, T., Osborne, H. L.M., Ho, C. S.K., Almenara, J. M., Artigau, E., Barragán, O., Barros, S.C.C., Bouchy, F., Cabrera, J., Caldwell, D. A., Charbonneau, D., Chaturvedi, Priyanka, Cochran, William D., Csizmadia, Szilard, Damasso, Mario, Delfosse, X., De Medeiros, J. R., Diaz, R. F., Doyon, René, Esposito, M., Furész, G., Figueira, P., Georgieva, Iskra, 1987, Goffo, E., Grziwa, S., Guenther, E. W., Hatzes, A., Jenkins, Jon M., Kabath, Petr, Knudstrup, E., Latham, D. W., Lavie, B., Lovis, C., Mennickent, R. E., Mullally, S. E., Murgas, F., Narita, Norio, Pepe, Francesco, Persson, Carina, 1964, Redfield, S., Ricker, George R., Santos, N. C., Seager, S., Serrano, L. M., Smith, Alexis M. S., Mascareño, A. Suárez, Šubjak, J., Twicken, J. D., Udry, S., Vanderspek, Roland K., Zapatero-Osorio, M. |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 507(2):2154-2173 |
| Predmety: | planets and satellites: individual: L231-32, planets and satellites: formation, planets and satellites: composition, planets and satellites: fundamental parameters |
| Popis: | We report on precise Doppler measurements of L231-32 (TOI-270), a nearby M dwarf (d = 22 pc, M = 0.39 M, R = 0.38 R), 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, respectively. The combination of radius and mass measurements suggests that the innermost planet has a rocky composition similar to that of Earth, while the outer two planets have lower densities. Thus, the inner planet and the outer planets are on opposite sides of the 'radius valley'-a region in the radius-period diagram with relatively few members-which has been interpreted as a consequence of atmospheric photoevaporation. We place these findings into the context of other small close-in planets orbiting M dwarf stars, and use support vector machines to determine the location and slope of the M dwarf (Teff < 4000 K) radius valley as a function of orbital period. We compare the location of the M dwarf radius valley to the radius valley observed for FGK stars, and find that its location is a good match to photoevaporation and core-powered mass-loss models. Finally, we show that planets below the M dwarf radius valley have compositions consistent with stripped rocky cores, whereas most planets above have a lower density consistent with the presence of a H-He atmosphere. |
| Popis súboru: | electronic |
| Prístupová URL adresa: | https://research.chalmers.se/publication/526590 https://research.chalmers.se/publication/526590/file/526590_Fulltext.pdf |
| Databáza: | SwePub |
| FullText | Text: Availability: 0 CustomLinks: – Url: https://research.chalmers.se/publication/526590# Name: EDS - SwePub (s4221598) Category: fullText Text: View record in SwePub – Url: https://resolver.ebscohost.com/openurl?sid=EBSCO:edsswe&genre=article&issn=00358711&ISBN=&volume=507&issue=2&date=20210101&spage=2154&pages=2154-2173&title=Monthly Notices of the Royal Astronomical Society&atitle=Masses%20and%20compositions%20of%20three%20small%20planets%20orbiting%20the%20nearby%20M%20dwarf%20L231-32%20%28TOI-270%29%20and%20the%20M%20dwarf%20radius%20valley&aulast=Van%20Eylen%2C%20Vincent&id=DOI:10.1093/mnras/stab2143 Name: Full Text Finder Category: fullText Text: Full Text Finder Icon: https://imageserver.ebscohost.com/branding/images/FTF.gif MouseOverText: Full Text Finder – Url: https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=EBSCO&SrcAuth=EBSCO&DestApp=WOS&ServiceName=TransferToWoS&DestLinkType=GeneralSearchSummary&Func=Links&author=Van%20Eylen%20V Name: ISI Category: fullText Text: Nájsť tento článok vo Web of Science Icon: https://imagesrvr.epnet.com/ls/20docs.gif MouseOverText: Nájsť tento článok vo Web of Science |
|---|---|
| Header | DbId: edsswe DbLabel: SwePub An: edsswe.oai.research.chalmers.se.f27cb0ac.e2b7.4cc4.9626.b3fcab7d27d8 RelevancyScore: 1004 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 1004.00384521484 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Van+Eylen%2C+Vincent%22">Van Eylen, Vincent</searchLink><br /><searchLink fieldCode="AR" term="%22Astudillo-Defru%2C+N%2E%22">Astudillo-Defru, N.</searchLink><br /><searchLink fieldCode="AR" term="%22Bonfils%2C+X%2E%22">Bonfils, X.</searchLink><br /><searchLink fieldCode="AR" term="%22Livingston%2C+J%2EH%2E%22">Livingston, J.H.</searchLink><br /><searchLink fieldCode="AR" term="%22Hirano%2C+T%2E%22">Hirano, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Luque%2C+R%2E%22">Luque, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Lam%2C+K%2E+W%2EF%2E%22">Lam, K. W.F.</searchLink><br /><searchLink fieldCode="AR" term="%22Justesen%2C+A%2EB%2E%22">Justesen, A.B.</searchLink><br /><searchLink fieldCode="AR" term="%22Winn%2C+J%2E+N%2E%22">Winn, J. N.</searchLink><br /><searchLink fieldCode="AR" term="%22Gandolfi%2C+D%2E%22">Gandolfi, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Nowak%2C+G%2E%22">Nowak, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Palle%2C+Enric%22">Palle, Enric</searchLink><br /><searchLink fieldCode="AR" term="%22Albrecht%2C+Simon%22">Albrecht, Simon</searchLink><br /><searchLink fieldCode="AR" term="%22Dai%2C+Fei%22">Dai, Fei</searchLink><br /><searchLink fieldCode="AR" term="%22Campos+Estrada%2C+B%2E%22">Campos Estrada, B.</searchLink><br /><searchLink fieldCode="AR" term="%22Owen%2C+James+E%2E%22">Owen, James E.</searchLink><br /><searchLink fieldCode="AR" term="%22Foreman-Mackey%2C+D%2E%22">Foreman-Mackey, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Fridlund%2C+Malcolm%22">Fridlund, Malcolm</searchLink>, 1952<br /><searchLink fieldCode="AR" term="%22Korth%2C+Judith%22">Korth, Judith</searchLink>, 1987<br /><searchLink fieldCode="AR" term="%22Mathur%2C+S%2E%22">Mathur, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Forveille%2C+T%2E%22">Forveille, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Mikal-Evans%2C+T%2E%22">Mikal-Evans, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Osborne%2C+H%2E+L%2EM%2E%22">Osborne, H. L.M.</searchLink><br /><searchLink fieldCode="AR" term="%22Ho%2C+C%2E+S%2EK%2E%22">Ho, C. S.K.</searchLink><br /><searchLink fieldCode="AR" term="%22Almenara%2C+J%2E+M%2E%22">Almenara, J. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Artigau%2C+E%2E%22">Artigau, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Barragán%2C+O%2E%22">Barragán, O.</searchLink><br /><searchLink fieldCode="AR" term="%22Barros%2C+S%2EC%2EC%2E%22">Barros, S.C.C.</searchLink><br /><searchLink fieldCode="AR" term="%22Bouchy%2C+F%2E%22">Bouchy, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Cabrera%2C+J%2E%22">Cabrera, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Caldwell%2C+D%2E+A%2E%22">Caldwell, D. A.</searchLink><br /><searchLink fieldCode="AR" term="%22Charbonneau%2C+D%2E%22">Charbonneau, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Chaturvedi%2C+Priyanka%22">Chaturvedi, Priyanka</searchLink><br /><searchLink fieldCode="AR" term="%22Cochran%2C+William+D%2E%22">Cochran, William D.</searchLink><br /><searchLink fieldCode="AR" term="%22Csizmadia%2C+Szilard%22">Csizmadia, Szilard</searchLink><br /><searchLink fieldCode="AR" term="%22Damasso%2C+Mario%22">Damasso, Mario</searchLink><br /><searchLink fieldCode="AR" term="%22Delfosse%2C+X%2E%22">Delfosse, X.</searchLink><br /><searchLink fieldCode="AR" term="%22De+Medeiros%2C+J%2E+R%2E%22">De Medeiros, J. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Diaz%2C+R%2E+F%2E%22">Diaz, R. F.</searchLink><br /><searchLink fieldCode="AR" term="%22Doyon%2C+René%22">Doyon, René</searchLink><br /><searchLink fieldCode="AR" term="%22Esposito%2C+M%2E%22">Esposito, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Furész%2C+G%2E%22">Furész, G.</searchLink><br /><searchLink fieldCode="AR" term="%22Figueira%2C+P%2E%22">Figueira, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Georgieva%2C+Iskra%22">Georgieva, Iskra</searchLink>, 1987<br /><searchLink fieldCode="AR" term="%22Goffo%2C+E%2E%22">Goffo, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Grziwa%2C+S%2E%22">Grziwa, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Guenther%2C+E%2E+W%2E%22">Guenther, E. W.</searchLink><br /><searchLink fieldCode="AR" term="%22Hatzes%2C+A%2E%22">Hatzes, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Jenkins%2C+Jon+M%2E%22">Jenkins, Jon M.</searchLink><br /><searchLink fieldCode="AR" term="%22Kabath%2C+Petr%22">Kabath, Petr</searchLink><br /><searchLink fieldCode="AR" term="%22Knudstrup%2C+E%2E%22">Knudstrup, E.</searchLink><br /><searchLink fieldCode="AR" term="%22Latham%2C+D%2E+W%2E%22">Latham, D. W.</searchLink><br /><searchLink fieldCode="AR" term="%22Lavie%2C+B%2E%22">Lavie, B.</searchLink><br /><searchLink fieldCode="AR" term="%22Lovis%2C+C%2E%22">Lovis, C.</searchLink><br /><searchLink fieldCode="AR" term="%22Mennickent%2C+R%2E+E%2E%22">Mennickent, R. E.</searchLink><br /><searchLink fieldCode="AR" term="%22Mullally%2C+S%2E+E%2E%22">Mullally, S. E.</searchLink><br /><searchLink fieldCode="AR" term="%22Murgas%2C+F%2E%22">Murgas, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Narita%2C+Norio%22">Narita, Norio</searchLink><br /><searchLink fieldCode="AR" term="%22Pepe%2C+Francesco%22">Pepe, Francesco</searchLink><br /><searchLink fieldCode="AR" term="%22Persson%2C+Carina%22">Persson, Carina</searchLink>, 1964<br /><searchLink fieldCode="AR" term="%22Redfield%2C+S%2E%22">Redfield, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Ricker%2C+George+R%2E%22">Ricker, George R.</searchLink><br /><searchLink fieldCode="AR" term="%22Santos%2C+N%2E+C%2E%22">Santos, N. C.</searchLink><br /><searchLink fieldCode="AR" term="%22Seager%2C+S%2E%22">Seager, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Serrano%2C+L%2E+M%2E%22">Serrano, L. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Smith%2C+Alexis+M%2E+S%2E%22">Smith, Alexis M. S.</searchLink><br /><searchLink fieldCode="AR" term="%22Mascareño%2C+A%2E+Suárez%22">Mascareño, A. Suárez</searchLink><br /><searchLink fieldCode="AR" term="%22Šubjak%2C+J%2E%22">Šubjak, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Twicken%2C+J%2E+D%2E%22">Twicken, J. D.</searchLink><br /><searchLink fieldCode="AR" term="%22Udry%2C+S%2E%22">Udry, S.</searchLink><br /><searchLink fieldCode="AR" term="%22Vanderspek%2C+Roland+K%2E%22">Vanderspek, Roland K.</searchLink><br /><searchLink fieldCode="AR" term="%22Zapatero-Osorio%2C+M%2E%22">Zapatero-Osorio, M.</searchLink> – Name: TitleSource Label: Source Group: Src Data: <i>Monthly Notices of the Royal Astronomical Society</i>. 507(2):2154-2173 – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22planets+and+satellites%3A+individual%3A+L231-32%22">planets and satellites: individual: L231-32</searchLink><br /><searchLink fieldCode="DE" term="%22planets+and+satellites%3A+formation%22">planets and satellites: formation</searchLink><br /><searchLink fieldCode="DE" term="%22planets+and+satellites%3A+composition%22">planets and satellites: composition</searchLink><br /><searchLink fieldCode="DE" term="%22planets+and+satellites%3A+fundamental+parameters%22">planets and satellites: fundamental parameters</searchLink> – Name: Abstract Label: Description Group: Ab Data: We report on precise Doppler measurements of L231-32 (TOI-270), a nearby M dwarf (d = 22 pc, M = 0.39 M, R = 0.38 R), 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, respectively. The combination of radius and mass measurements suggests that the innermost planet has a rocky composition similar to that of Earth, while the outer two planets have lower densities. Thus, the inner planet and the outer planets are on opposite sides of the 'radius valley'-a region in the radius-period diagram with relatively few members-which has been interpreted as a consequence of atmospheric photoevaporation. We place these findings into the context of other small close-in planets orbiting M dwarf stars, and use support vector machines to determine the location and slope of the M dwarf (Teff < 4000 K) radius valley as a function of orbital period. We compare the location of the M dwarf radius valley to the radius valley observed for FGK stars, and find that its location is a good match to photoevaporation and core-powered mass-loss models. Finally, we show that planets below the M dwarf radius valley have compositions consistent with stripped rocky cores, whereas most planets above have a lower density consistent with the presence of a H-He atmosphere. – Name: Format Label: File Description Group: SrcInfo Data: electronic – Name: URL Label: Access URL Group: URL Data: <link linkTarget="URL" linkTerm="https://research.chalmers.se/publication/526590" linkWindow="_blank">https://research.chalmers.se/publication/526590</link><br /><link linkTarget="URL" linkTerm="https://research.chalmers.se/publication/526590/file/526590_Fulltext.pdf" linkWindow="_blank">https://research.chalmers.se/publication/526590/file/526590_Fulltext.pdf</link> |
| PLink | https://erproxy.cvtisr.sk/sfx/access?url=https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=edsswe&AN=edsswe.oai.research.chalmers.se.f27cb0ac.e2b7.4cc4.9626.b3fcab7d27d8 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1093/mnras/stab2143 Languages: – Text: English PhysicalDescription: Pagination: PageCount: 20 StartPage: 2154 Subjects: – SubjectFull: planets and satellites: individual: L231-32 Type: general – SubjectFull: planets and satellites: formation Type: general – SubjectFull: planets and satellites: composition Type: general – SubjectFull: planets and satellites: fundamental parameters Type: general Titles: – TitleFull: Masses and compositions of three small planets orbiting the nearby M dwarf L231-32 (TOI-270) and the M dwarf radius valley Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Van Eylen, Vincent – PersonEntity: Name: NameFull: Astudillo-Defru, N. – PersonEntity: Name: NameFull: Bonfils, X. – PersonEntity: Name: NameFull: Livingston, J.H. – PersonEntity: Name: NameFull: Hirano, T. – PersonEntity: Name: NameFull: Luque, R. – PersonEntity: Name: NameFull: Lam, K. W.F. – PersonEntity: Name: NameFull: Justesen, A.B. – PersonEntity: Name: NameFull: Winn, J. N. – PersonEntity: Name: NameFull: Gandolfi, D. – PersonEntity: Name: NameFull: Nowak, G. – PersonEntity: Name: NameFull: Palle, Enric – PersonEntity: Name: NameFull: Albrecht, Simon – PersonEntity: Name: NameFull: Dai, Fei – PersonEntity: Name: NameFull: Campos Estrada, B. – PersonEntity: Name: NameFull: Owen, James E. – PersonEntity: Name: NameFull: Foreman-Mackey, D. – PersonEntity: Name: NameFull: Fridlund, Malcolm – PersonEntity: Name: NameFull: Korth, Judith – PersonEntity: Name: NameFull: Mathur, S. – PersonEntity: Name: NameFull: Forveille, T. – PersonEntity: Name: NameFull: Mikal-Evans, T. – PersonEntity: Name: NameFull: Osborne, H. L.M. – PersonEntity: Name: NameFull: Ho, C. S.K. – PersonEntity: Name: NameFull: Almenara, J. M. – PersonEntity: Name: NameFull: Artigau, E. – PersonEntity: Name: NameFull: Barragán, O. – PersonEntity: Name: NameFull: Barros, S.C.C. – PersonEntity: Name: NameFull: Bouchy, F. – PersonEntity: Name: NameFull: Cabrera, J. – PersonEntity: Name: NameFull: Caldwell, D. A. – PersonEntity: Name: NameFull: Charbonneau, D. – PersonEntity: Name: NameFull: Chaturvedi, Priyanka – PersonEntity: Name: NameFull: Cochran, William D. – PersonEntity: Name: NameFull: Csizmadia, Szilard – PersonEntity: Name: NameFull: Damasso, Mario – PersonEntity: Name: NameFull: Delfosse, X. – PersonEntity: Name: NameFull: De Medeiros, J. R. – PersonEntity: Name: NameFull: Diaz, R. F. – PersonEntity: Name: NameFull: Doyon, René – PersonEntity: Name: NameFull: Esposito, M. – PersonEntity: Name: NameFull: Furész, G. – PersonEntity: Name: NameFull: Figueira, P. – PersonEntity: Name: NameFull: Georgieva, Iskra – PersonEntity: Name: NameFull: Goffo, E. – PersonEntity: Name: NameFull: Grziwa, S. – PersonEntity: Name: NameFull: Guenther, E. W. – PersonEntity: Name: NameFull: Hatzes, A. – PersonEntity: Name: NameFull: Jenkins, Jon M. – PersonEntity: Name: NameFull: Kabath, Petr – PersonEntity: Name: NameFull: Knudstrup, E. – PersonEntity: Name: NameFull: Latham, D. W. – PersonEntity: Name: NameFull: Lavie, B. – PersonEntity: Name: NameFull: Lovis, C. – PersonEntity: Name: NameFull: Mennickent, R. E. – PersonEntity: Name: NameFull: Mullally, S. E. – PersonEntity: Name: NameFull: Murgas, F. – PersonEntity: Name: NameFull: Narita, Norio – PersonEntity: Name: NameFull: Pepe, Francesco – PersonEntity: Name: NameFull: Persson, Carina – PersonEntity: Name: NameFull: Redfield, S. – PersonEntity: Name: NameFull: Ricker, George R. – PersonEntity: Name: NameFull: Santos, N. C. – PersonEntity: Name: NameFull: Seager, S. – PersonEntity: Name: NameFull: Serrano, L. M. – PersonEntity: Name: NameFull: Smith, Alexis M. S. – PersonEntity: Name: NameFull: Mascareño, A. Suárez – PersonEntity: Name: NameFull: Šubjak, J. – PersonEntity: Name: NameFull: Twicken, J. D. – PersonEntity: Name: NameFull: Udry, S. – PersonEntity: Name: NameFull: Vanderspek, Roland K. – PersonEntity: Name: NameFull: Zapatero-Osorio, M. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Type: published Y: 2021 Identifiers: – Type: issn-print Value: 00358711 – Type: issn-print Value: 13652966 – Type: issn-locals Value: SWEPUB_FREE – Type: issn-locals Value: CTH_SWEPUB Numbering: – Type: volume Value: 507 – Type: issue Value: 2 Titles: – TitleFull: Monthly Notices of the Royal Astronomical Society Type: main |
| ResultId | 1 |
Full Text Finder
Nájsť tento článok vo Web of Science