Search: onr:"swepub:oai:research.chalmers.se:47f060b1-f00a-4b45-bd6b-592c81a2d6bb" >
A planetary system ...
-
Luque, R.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
A planetary system with two transiting mini-Neptunes near the radius valley transition around the bright M dwarf TOI-776
- Article/chapterEnglish2021
Publisher, publication year, extent ...
-
2021-01-05
-
EDP Sciences,2021
Numbers
-
LIBRIS-ID:oai:research.chalmers.se:47f060b1-f00a-4b45-bd6b-592c81a2d6bb
-
https://doi.org/10.1051/0004-6361/202039455DOI
-
https://research.chalmers.se/publication/521893URI
Supplementary language notes
-
Language:English
-
Summary in:English
Part of subdatabase
Classification
-
Subject category:art swepub-publicationtype
-
Subject category:ref swepub-contenttype
Notes
-
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.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
-
Serrano, L. M.Universita degli Studi di Torino,University of Turin
(author)
-
Molaverdikhani, K.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
(author)
-
Nixon, M. C.University Of Cambridge
(author)
-
Livingston, J. H.University of Tokyo, Japan
(author)
-
Guenther, E. W.Thüringer Landessternwarte Tautenburg
(author)
-
Palle, E.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
-
Madhusudhan, N.University Of Cambridge
(author)
-
Nowak, G.Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
-
Korth, JudithUniversität zu Köln,University of Cologne
(author)
-
Cochran, W. D.The University of Texas at Austin, USA
(author)
-
Hirano, T.Tokyo Institute of Technology
(author)
-
Chaturvedi, PriyankaThüringer Landessternwarte Tautenburg
(author)
-
Goffo, E.Universita degli Studi di Torino,University of Turin
(author)
-
Albrecht, S.Århus Universitet,Aarhus University
(author)
-
Barragán, O.University Of Oxford
(author)
-
Briceño, C.
(author)
-
Cabrera, J.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
-
Charbonneau, D.Harvard-Smithsonian Center for Astrophysics
(author)
-
Cloutier, R.Harvard-Smithsonian Center for Astrophysics
(author)
-
Collins, K. A.Harvard-Smithsonian Center for Astrophysics
(author)
-
Collins, Kevin I.George Mason University
(author)
-
Colón, K. D.NASA Goddard Space Flight Center
(author)
-
Crossfield, I. J.M.University of Kansas
(author)
-
Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
-
Dai, FeiCalifornia Institute of Technology (Caltech)
(author)
-
Deeg, H. J.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
-
Esposito, M.Thüringer Landessternwarte Tautenburg
(author)
-
Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)(Swepub:cth)malfri
(author)
-
Gandolfi, D.Universita degli Studi di Torino,University of Turin
(author)
-
Georgieva, Iskra,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)iskrag
(author)
-
Glidden, AnaMassachusetts Institute of Technology (MIT)
(author)
-
Goeke, RobertMassachusetts Institute of Technology (MIT)
(author)
-
Grziwa, S.Universität zu Köln,University of Cologne
(author)
-
Hatzes, A.Thüringer Landessternwarte Tautenburg
(author)
-
Henze, C. E.NASA Ames Research Center
(author)
-
Howell, S. B.NASA Ames Research Center
(author)
-
Irwin, J.Harvard-Smithsonian Center for Astrophysics
(author)
-
Jenkins, J. M.NASA Ames Research Center
(author)
-
Jensen, E. L.N.Swarthmore College
(author)
-
Kabath, PetrCzech Academy of Sciences
(author)
-
Kidwell, R. C.Space Telescope Science Institute (STScI)
(author)
-
Kielkopf, J. F.University of Louisville
(author)
-
Knudstrup, E.Århus Universitet,Aarhus University
(author)
-
Lam, K. W.F.Technische Universität Berlin
(author)
-
Latham, D. W.Harvard-Smithsonian Center for Astrophysics
(author)
-
Lissauer, Jack J.NASA Ames Research Center
(author)
-
Mann, A. W.The University of North Carolina System
(author)
-
Matthews, ElisabethMassachusetts Institute of Technology (MIT)
(author)
-
Mireles, IsmaelMassachusetts Institute of Technology (MIT)
(author)
-
Narita, N.University of Tokyo, Japan,National Institutes of Natural Sciences (NINS),Instituto de Astrofísica de Canarias,Japan Science and Technology Agency (JST)
(author)
-
Paegert, M.Harvard-Smithsonian Center for Astrophysics
(author)
-
Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64
(author)
-
Redfield, S.Wesleyan University
(author)
-
Ricker, George R.Massachusetts Institute of Technology (MIT)
(author)
-
Rodler, F.European Southern Observatory Santiago
(author)
-
Schlieder, Joshua E.NASA Goddard Space Flight Center
(author)
-
Scott, N. J.NASA Ames Research Center
(author)
-
Seager, S.Massachusetts Institute of Technology (MIT)
(author)
-
Šubjak, J.Czech Academy of Sciences
(author)
-
Tan, T. G.
(author)
-
Ting, Eric B.NASA Ames Research Center
(author)
-
Vanderspek, Roland K.Massachusetts Institute of Technology (MIT)
(author)
-
Van Eylen, VincentUniversity College London (UCL)
(author)
-
Winn, J. N.Princeton University
(author)
-
Ziegler, C.University of Toronto
(author)
-
Instituto de Astrofísica de CanariasUniversidad de la Laguna
(creator_code:org_t)
Related titles
-
In:Astronomy and Astrophysics: EDP Sciences6450004-63611432-0746
Internet link
Find in a library
To the university's database
- By the author/editor
-
Luque, R.
-
Serrano, L. M.
-
Molaverdikhani, ...
-
Nixon, M. C.
-
Livingston, J. H ...
-
Guenther, E. W.
-
show more...
-
Palle, E.
-
Madhusudhan, N.
-
Nowak, G.
-
Korth, Judith
-
Cochran, W. D.
-
Hirano, T.
-
Chaturvedi, Priy ...
-
Goffo, E.
-
Albrecht, S.
-
Barragán, O.
-
Briceño, C.
-
Cabrera, J.
-
Charbonneau, D.
-
Cloutier, R.
-
Collins, K. A.
-
Collins, Kevin I ...
-
Colón, K. D.
-
Crossfield, I. J ...
-
Csizmadia, Szila ...
-
Dai, Fei
-
Deeg, H. J.
-
Esposito, M.
-
Fridlund, Malcol ...
-
Gandolfi, D.
-
Georgieva, Iskra ...
-
Glidden, Ana
-
Goeke, Robert
-
Grziwa, S.
-
Hatzes, A.
-
Henze, C. E.
-
Howell, S. B.
-
Irwin, J.
-
Jenkins, J. M.
-
Jensen, E. L.N.
-
Kabath, Petr
-
Kidwell, R. C.
-
Kielkopf, J. F.
-
Knudstrup, E.
-
Lam, K. W.F.
-
Latham, D. W.
-
Lissauer, Jack J ...
-
Mann, A. W.
-
Matthews, Elisab ...
-
Mireles, Ismael
-
Narita, N.
-
Paegert, M.
-
Persson, Carina, ...
-
Redfield, S.
-
Ricker, George R ...
-
Rodler, F.
-
Schlieder, Joshu ...
-
Scott, N. J.
-
Seager, S.
-
Šubjak, J.
-
Tan, T. G.
-
Ting, Eric B.
-
Vanderspek, Rola ...
-
Van Eylen, Vince ...
-
Winn, J. N.
-
Ziegler, C.
-
show less...
- About the subject
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Meteorology and ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Physical Science ...
-
and Astronomy Astrop ...
-
- NATURAL SCIENCES
-
NATURAL SCIENCES
-
and Earth and Relate ...
-
and Geophysics
- Articles in the publication
-
Astronomy and As ...
- By the university
-
Chalmers University of Technology