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LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00009301naa a2201177 4500
001oai:research.chalmers.se:47f060b1-f00a-4b45-bd6b-592c81a2d6bb
003SwePub
008210115s2021 | |||||||||||000 ||eng|
0247 a https://doi.org/10.1051/0004-6361/2020394552 DOI
0247 a https://research.chalmers.se/publication/5218932 URI
040 a (SwePub)cth
041 a engb eng
042 9 SwePub
072 7a art2 swepub-publicationtype
072 7a ref2 swepub-contenttype
1001 a Luque, R.u Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut
2451 0a A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
264 c 2021-01-05
264 1b EDP Sciences,c 2021
520 a We report the discovery and characterization of two transiting planets around the bright M1 V star LP 961-53 (TOI-776, J = 8.5 mag, M = 0.54 ± 0.03 M⊙) detected during Sector 10 observations of the Transiting Exoplanet Survey Satellite (TESS). Combining the TESS photometry with HARPS radial velocities, as well as ground-based follow-up transit observations from the MEarth and LCOGT telescopes, for the inner planet, TOI-776 b, we measured a period of Pb = 8.25 d, a radius of Rb = 1.85 ± 0.13 R⊙, and a mass of Mb = 4.0 ± 0.9 M⊙; and for the outer planet, TOI-776 c, a period of Pc = 15.66 d, a radius of Rc = 2.02 ± 0.14 R⊙, and a mass of Mc = 5.3 ± 1.8 M⊙. The Doppler data shows one additional signal, with a period of ~34 d, associated with the rotational period of the star. The analysis of fifteen years of ground-based photometric monitoring data and the inspection of different spectral line indicators confirm this assumption. The bulk densities of TOI-776 b and c allow for a wide range of possible interior and atmospheric compositions. However, both planets have retained a significant atmosphere, with slightly different envelope mass fractions. Thanks to their location near the radius gap for M dwarfs, we can start to explore the mechanism(s) responsible for the radius valley emergence around low-mass stars as compared to solar-like stars. While a larger sample of well-characterized planets in this parameter space is still needed to draw firm conclusions, we tentatively estimate that the stellar mass below which thermally-driven mass loss is no longer the main formation pathway for sculpting the radius valley is between 0.63 and 0.54 M⊙. Due to the brightness of the star, the TOI-776 system is also an excellent target for the James Webb Space Telescope, providing a remarkable laboratory in which to break the degeneracy in planetary interior models and to test formation and evolution theories of small planets around low-mass stars.
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Meteorologi och atmosfärforskning0 (SwePub)105082 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Meteorology and Atmospheric Sciences0 (SwePub)105082 hsv//eng
650 7a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geofysik0 (SwePub)105052 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geophysics0 (SwePub)105052 hsv//eng
653 a Stars: individual: LP 961-53
653 a Planetary systems
653 a Stars: low-mass
653 a Techniques: radial velocities
653 a Techniques: photometric
7001 a Serrano, L. M.u Universita degli Studi di Torino,University of Turin4 aut
7001 a Molaverdikhani, K.u Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)4 aut
7001 a Nixon, M. C.u University Of Cambridge4 aut
7001 a Livingston, J. H.u University of Tokyo, Japan4 aut
7001 a Guenther, E. W.u Thüringer Landessternwarte Tautenburg4 aut
7001 a Palle, E.u Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut
7001 a Madhusudhan, N.u University Of Cambridge4 aut
7001 a Nowak, G.u Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias4 aut
7001 a Korth, Judithu Universität zu Köln,University of Cologne4 aut
7001 a Cochran, W. D.u The University of Texas at Austin, USA4 aut
7001 a Hirano, T.u Tokyo Institute of Technology4 aut
7001 a Chaturvedi, Priyankau Thüringer Landessternwarte Tautenburg4 aut
7001 a Goffo, E.u Universita degli Studi di Torino,University of Turin4 aut
7001 a Albrecht, S.u Århus Universitet,Aarhus University4 aut
7001 a Barragán, O.u University Of Oxford4 aut
7001 a Briceño, C.4 aut
7001 a Cabrera, J.u Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut
7001 a Charbonneau, D.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Cloutier, R.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Collins, K. A.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Collins, Kevin I.u George Mason University4 aut
7001 a Colón, K. D.u NASA Goddard Space Flight Center4 aut
7001 a Crossfield, I. J.M.u University of Kansas4 aut
7001 a Csizmadia, Szilardu Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)4 aut
7001 a Dai, Feiu California Institute of Technology (Caltech)4 aut
7001 a Deeg, H. J.u Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna4 aut
7001 a Esposito, M.u Thüringer Landessternwarte Tautenburg4 aut
7001 a Fridlund, Malcolm,d 1952u Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)4 aut0 (Swepub:cth)malfri
7001 a Gandolfi, D.u Universita degli Studi di Torino,University of Turin4 aut
7001 a Georgieva, Iskra,d 1987u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)iskrag
7001 a Glidden, Anau Massachusetts Institute of Technology (MIT)4 aut
7001 a Goeke, Robertu Massachusetts Institute of Technology (MIT)4 aut
7001 a Grziwa, S.u Universität zu Köln,University of Cologne4 aut
7001 a Hatzes, A.u Thüringer Landessternwarte Tautenburg4 aut
7001 a Henze, C. E.u NASA Ames Research Center4 aut
7001 a Howell, S. B.u NASA Ames Research Center4 aut
7001 a Irwin, J.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Jenkins, J. M.u NASA Ames Research Center4 aut
7001 a Jensen, E. L.N.u Swarthmore College4 aut
7001 a Kabath, Petru Czech Academy of Sciences4 aut
7001 a Kidwell, R. C.u Space Telescope Science Institute (STScI)4 aut
7001 a Kielkopf, J. F.u University of Louisville4 aut
7001 a Knudstrup, E.u Århus Universitet,Aarhus University4 aut
7001 a Lam, K. W.F.u Technische Universität Berlin4 aut
7001 a Latham, D. W.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Lissauer, Jack J.u NASA Ames Research Center4 aut
7001 a Mann, A. W.u The University of North Carolina System4 aut
7001 a Matthews, Elisabethu Massachusetts Institute of Technology (MIT)4 aut
7001 a Mireles, Ismaelu Massachusetts Institute of Technology (MIT)4 aut
7001 a Narita, N.u University of Tokyo, Japan,National Institutes of Natural Sciences (NINS),Instituto de Astrofísica de Canarias,Japan Science and Technology Agency (JST)4 aut
7001 a Paegert, M.u Harvard-Smithsonian Center for Astrophysics4 aut
7001 a Persson, Carina,d 1964u Chalmers tekniska högskola,Chalmers University of Technology4 aut0 (Swepub:cth)carina64
7001 a Redfield, S.u Wesleyan University4 aut
7001 a Ricker, George R.u Massachusetts Institute of Technology (MIT)4 aut
7001 a Rodler, F.u European Southern Observatory Santiago4 aut
7001 a Schlieder, Joshua E.u NASA Goddard Space Flight Center4 aut
7001 a Scott, N. J.u NASA Ames Research Center4 aut
7001 a Seager, S.u Massachusetts Institute of Technology (MIT)4 aut
7001 a Šubjak, J.u Czech Academy of Sciences4 aut
7001 a Tan, T. G.4 aut
7001 a Ting, Eric B.u NASA Ames Research Center4 aut
7001 a Vanderspek, Roland K.u Massachusetts Institute of Technology (MIT)4 aut
7001 a Van Eylen, Vincentu University College London (UCL)4 aut
7001 a Winn, J. N.u Princeton University4 aut
7001 a Ziegler, C.u University of Toronto4 aut
7102 a Instituto de Astrofísica de Canariasb Universidad de la Laguna4 org
7730 t Astronomy and Astrophysicsd : EDP Sciencesg 645q 645x 0004-6361x 1432-0746
8564 u https://authors.library.caltech.edu/107510/1/aa39455-20.pdf
8564 8u https://doi.org/10.1051/0004-6361/202039455
8564 8u https://research.chalmers.se/publication/521893

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