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Barros, S.C.C.; Gosselin, H.; Lillo-Box, J.; Bayliss, D.; Delgado Mena, E.; Brugger, B.; Santerne, A.; Armstrong, D.J.; Adibekyan, V.; Armstrong, J.D.; Barrado, D.; Bento, J.; Boisse, I.; Bonomo, A.S.; Bouchy, F.; Brown, D.J.A.; Cochran, W.D.; Collier Cameron, A. (...) Wyttenbach, A. "Precise masses for the transiting planetary system HD 106315 with HARPS" (2017) Astronomy and Astrophysics. 608
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Abstract:

Context. The multi-planetary system HD 106315 was recently found in K2 data. The planets have periods of P b ∼ 9.55 and P c ∼ 21.06 days, and radii of r b = 2.44 ± 0.17 R ⊕ and r c = 4.35 ± 0.23 R ⊕ . The brightness of the host star (V = 9.0 mag) makes it an excellent target for transmission spectroscopy. However, to interpret transmission spectra it is crucial to measure the planetary masses. Aims. We obtained high precision radial velocities for HD 106315 to determine the mass of the two transiting planets discovered with Kepler K2. Our successful observation strategy was carefully tailored to mitigate the effect of stellar variability. Methods. We modelled the new radial velocity data together with the K2 transit photometry and a new ground-based partial transit of HD 106315c to derive system parameters. Results. We estimate the mass of HD 106315b to be 12.6 ± 3.2 M ⊕ and the density to be 4.7 ± 1.7 g cm -3 , while for HD 106315c we estimate a mass of 15.2 ± 3.7 M ⊕ and a density of 1.01 ± 0.29 g cm -3 . Hence, despite planet c having a radius almost twice as large as planet b, their masses are consistent with one another. Conclusions. We conclude that HD 106315c has a thick hydrogen-helium gaseous envelope. A detailed investigation of HD 106315b using a planetary interior model constrains the core mass fraction to be 5-29%, and the water mass fraction to be 10-50%. An alternative, not considered by our model, is that HD 106315b is composed of a large rocky core with a thick H-He envelope. Transmission spectroscopy of these planets will give insight into their atmospheric compositions and also help constrain their core compositions. © ESO, 2017.

Registro:

Documento: Artículo
Título:Precise masses for the transiting planetary system HD 106315 with HARPS
Autor:Barros, S.C.C.; Gosselin, H.; Lillo-Box, J.; Bayliss, D.; Delgado Mena, E.; Brugger, B.; Santerne, A.; Armstrong, D.J.; Adibekyan, V.; Armstrong, J.D.; Barrado, D.; Bento, J.; Boisse, I.; Bonomo, A.S.; Bouchy, F.; Brown, D.J.A.; Cochran, W.D.; Collier Cameron, A.; Deleuil, M.; Demangeon, O.; Díaz, R.F.; Doyle, A.; Dumusque, X.; Ehrenreich, D.; Espinoza, N.; Faedi, F.; Faria, J.P.; Figueira, P.; Foxell, E.; Hébrard, G.; Hojjatpanah, S.; Jackman, J.; Lendl, M.; Ligi, R.; Lovis, C.; Melo, C.; Mousis, O.; Neal, J.J.; Osborn, H.P.; Pollacco, D.; Santos, N.C.; Sefako, R.; Shporer, A.; Sousa, S.G.; Triaud, A.H.M.J.; Udry, S.; Vigan, A.; Wyttenbach, A.
Filiación:Instituto de Astrofísica e Ciências do Espaço, Universidade do Porto, CAUP, Rua das Estrelas, Porto, 4150-762, Portugal
Aix-Marseille Univ., CNRS, Laboratoire d'Astrophysique de Marseille, Marseille, 13013, France
European Southern Observatory (ESO), Alonso de Cordova 3107, Vitacura, Casilla, Santiago de Chile, 19001, Chile
Observatoire Astronomique de l'Universite de Geneve, 51 chemin des Maillettes, Versoix, 1290, Switzerland
Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
Institute for Astronomy, University of Hawaii, 34 Ohia Ku Street, Pukalani, Maui, HI 96790, United States
Depto. de Astrofísica, Centro de Astrobiología (CSIC-INTA), ESAC campus, Villanueva de la Cañada (Madrid), 28692, Spain
Research School of Astronomy and Astrophysics, Australian National University, Mount Stromlo Observatory, Cotter Road, Weston-Creek, ACT 2611, Australia
INAF-Osservatorio Astrofisico di Torino, Strada Osservatorio 20, Pino Torinese (TO), 10025, Italy
McDonald Observatory and Department of Astronomy, University of Texas at Austin, Austin, TX 78712, United States
Centre for Exoplanet Science, SUPA School of Physics and Astronomy, University of St. Andrews, North Haugh St., Andrews, Fife, KY16 9SS, United Kingdom
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, 1053, Argentina
CONICET - Universidad de Buenos Aires, Instituto de Astronomía y Física del Espacio (IAFE), Buenos Aires, 1053, Argentina
Instituto de Astrofisica, Facultad de Fisica, Pontificia Universidad Catolica de Chile, Av. Vicuna Mackenna 4860, Macul, Santiago, 782-0436, Chile
Millennium Institute of Astrophysics, Av. Vicuna Mackenna 4860, Macul, Santiago, 782-0436, Chile
Departamento de Fisica e Astronomia, Faculdade de Ciencias, Universidade do Porto, Rua Campo Alegre, Porto, 4169-007, Portugal
Institut d'Astrophysique de Paris, UMR 7095 CNRS, Université Pierre and Marie Curie, 98bis boulevard Arago, Paris, 75014, France
Aix-Marseille Univ, CNRS, OHP, Observatoire de Haute Provence, Saint-Michel l' Observatoire, 04870, France
Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, Graz, 8042, Austria
South African Astronomical Observatory, PO Box 9, Cape Town, 7935, South Africa
Division of Geological and PlanetarySciences, California Institute of Technology, Pasadena, CA 91125, United States
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0 HA, United Kingdom
Université de Toulouse, UPS-OMP, IRAP, Toulouse, 31013, France
Palabras clave:Planets and satellites: Composition; Planets and satellites: Detection; Planets and satellites: Fundamental parameters; Stars: Individual: HD 106315; Techniques: Photometric; Techniques: Radial velocities; Atmospheric composition; Digital television; Flexible couplings; Lead; Photometry; Planets; Stars; Planets and satellites: compositions; Planets and satellites: detections; Planets and satellites: fundamental parameters; Stars: individual; Techniques: photometric; Techniques: radial velocities; Satellites
Año:2017
Volumen:608
DOI: http://dx.doi.org/10.1051/0004-6361/201731276
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v608_n_p_Barros

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Citas:

---------- APA ----------
Barros, S.C.C., Gosselin, H., Lillo-Box, J., Bayliss, D., Delgado Mena, E., Brugger, B., Santerne, A.,..., Wyttenbach, A. (2017) . Precise masses for the transiting planetary system HD 106315 with HARPS. Astronomy and Astrophysics, 608.
http://dx.doi.org/10.1051/0004-6361/201731276
---------- CHICAGO ----------
Barros, S.C.C., Gosselin, H., Lillo-Box, J., Bayliss, D., Delgado Mena, E., Brugger, B., et al. "Precise masses for the transiting planetary system HD 106315 with HARPS" . Astronomy and Astrophysics 608 (2017).
http://dx.doi.org/10.1051/0004-6361/201731276
---------- MLA ----------
Barros, S.C.C., Gosselin, H., Lillo-Box, J., Bayliss, D., Delgado Mena, E., Brugger, B., et al. "Precise masses for the transiting planetary system HD 106315 with HARPS" . Astronomy and Astrophysics, vol. 608, 2017.
http://dx.doi.org/10.1051/0004-6361/201731276
---------- VANCOUVER ----------
Barros, S.C.C., Gosselin, H., Lillo-Box, J., Bayliss, D., Delgado Mena, E., Brugger, B., et al. Precise masses for the transiting planetary system HD 106315 with HARPS. Astron. Astrophys. 2017;608.
http://dx.doi.org/10.1051/0004-6361/201731276