Article (Scientific journals)
MANGOS ─ II. Five new giant planets orbiting low-mass stars
Dransfield, G.; Timmermans, Mathilde; Sebastian, D. et al.
2026In Monthly Notices of the Royal Astronomical Society, 547, p. 448
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Keywords :
exoplanets; planets and satellites: detection
Abstract :
[en] Giant planets orbiting low-mass stars on short orbits present a conundrum, as in the most extreme cases their existence cannot be reconciled with current models of core accretion. Therefore, surveys dedicated to finding these rare planets have a key role to play by growing the sample to overcome small number statistics. In this work, we present MANGOS, a programme dedicated to the search for giant objects (planets, brown dwarfs, and low-mass stars) orbiting M dwarfs. We report on the discovery of five new giant planets (TOI-3288 Ab, TOI-4666 b, TOI-5007 b, TOI-5292 Ab, TOI-5916 b) first detected by TESS, and confirmed using ground-based photometry and spectroscopy. The five planets have radii in the range of 0.99─1.12 , masses between 0.49 and 1.69 , and orbital periods between 1.43 and 2.91 d. We reveal that TOI-3288 and TOI-5292 are wide binaries, and in the case of TOI-5292, we are able to characterize both stellar components. We demonstrate that the planets presented are suitable for further characterization of their obliquities and atmospheres. We detect a small but significant eccentricity for TOI-5007 b, although for this to be more robust, more observations are needed to fully sample the orbit. Finally, we reveal a correlation between stellar metallicity and planet bulk density for giant planets orbiting low-mass stars.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Dransfield, G.;  University of Oxford, Department of Astrophysics, University of Oxford Magdalen College, University of Birmingham, School of Physics and Astronomy
Timmermans, Mathilde  ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Exoplanets in Transit: Identification and Characterization
Sebastian, D.;  Thuringer Landessternwarte Tautenburg, Germany
Rackham, B. V.;  MIT, Department of Earth and Planetary Science, MIT, Center for Space Research/Kavli Institute
Burgasser, A.;  Department of Astronomy &, Astrophysics, UC San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA,
Barkaoui, K.;  Astrophysical Institute of the Canaries, University of Liege, Belgium, MIT, Department of Earth and Planetary Science
Triaud, A. H. M. J.;  University of Birmingham, School of Physics and Astronomy
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO)
Almenara, J. M.;  Institute de Planetologie et d'Astrophysique de Grenoble, University of Geneva, Astronomical Observatory
Casewell, S. L.;  University of Leicester, Department of Physics and Astronomy
Collins, K. A.;  Harvard Smithsonian Center for Astrophysics
Fukui, A.;  University of Tokyo, Japan, Astrobiology Center, Japan
Janó Muñoz, C.;  University of Cambridge, Department of Physics
Kanodia, S.;  Carnegie Science Earth and Planets Laboratory, 5241 Broad Branch Road, NW, Washington, DC 20015, USA
Narita, N.;  Astrophysical Institute of the Canaries, University of Tokyo, Japan, Astrobiology Center, Japan
Palle, E.;  Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Scott, M. G.;  University of Birmingham, School of Physics and Astronomy
Soubkiou, Abderahmane ;  Université de Liège - ULiège > Astrobiology
Stokholm, A.;  University of Birmingham, School of Physics and Astronomy
Audenaert, J.;  MIT, Center for Space Research/Kavli Institute
Bakos, G. Á.;  Princeton University, Department of Astrophysical Sciences
Beletsky, Y.;  Carnegie Science Earth and Planets Laboratory, 5241 Broad Branch Road, NW, Washington, DC 20015, USA
de Beurs, Z. L.;  MIT, Department of Earth and Planetary Science, -
Benkhaldoun, Z.;  Department of Applied Physics and Astronomy, and Sharjah Academy for Astronomy, Space Sciences and Technology, University of Sharjah, Sharjah, United Arab Emirates, Cadi Ayyad University, Oukaimeden Observatory, High Energy Physics, Astrophysics and Geoscience Laboratory, FSSM, Marrakesh, Morocco,
Burdanov, A.;  MIT, Department of Earth and Planetary Science
Butler, R. P.;  Carnegie Science Earth and Planets Laboratory, 5241 Broad Branch Road, NW, Washington, DC 20015, USA
Caldwell, D.;  SETI Institute, California
Crane, J. D.;  Carnegie Institution of Washington, Observatories, California
Davis, Y. T.;  University of Birmingham, School of Physics and Astronomy
Demory, B. O.;  University of Bern, Switzerland
Ducrot, E.;  Paris Region Fellow, Marie Sklodowska-Curie Action, AIM, CEA, CNRS, Université Paris-Saclay, Université de Paris, F-91191 Gif-sur-Yvette, France
Gómez Maqueo Chew, Y.;  UNAM, Institute of Astronomy
Gachaoui, M.;  University of Liege, Belgium, -
Hartman, J. D.;  Princeton University, Department of Astrophysical Sciences
Hooton, M. J.;  University of Cambridge, Department of Physics
Jehin, Emmanuel  ;  Université de Liège - ULiège > Unités de recherche interfacultaires > Space sciences, Technologies and Astrophysics Research (STAR)
Mercier, S.;  MIT, Department of Earth and Planetary Science
Murgas, F.;  Astrophysical Institute of the Canaries, University of La Laguna, Department of Astrophysics
Murray, C.;  University of Colorado, Boulder, Department of Astrophysical and Planetary Sciences
Pedersen, P. P.;  University of Cambridge, Department of Physics, -
Pozuelos, F. J.;  Institute of Astrophysics of Andalusia
Rice, M.;  Yale University, Department of Astronomy
Ross, G.;  Princeton University, Department of Astrophysical Sciences
Shectman, S. A.;  Carnegie Institution of Washington, Observatories, California
Softich, E.;  Department of Astronomy &, Astrophysics, UC San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA
Tala Pinto, M.;  Department of Astronomy, McPherson Laboratory, The Ohio State University, 140 W 18th Avenue, Columbus, Ohio 43210, USA
Vanderburg, A. M.;  MIT, Center for Space Research/Kavli Institute
Villasenor, J.;  MIT, Center for Space Research/Kavli Institute
de Wit, J.;  MIT, Department of Earth and Planetary Science
Zúñiga Fernández, Sebastián Gaspar  ;  Université de Liège - ULiège > Astrobiology
More authors (40 more) Less
Language :
English
Title :
MANGOS ─ II. Five new giant planets orbiting low-mass stars
Publication date :
01 April 2026
Journal title :
Monthly Notices of the Royal Astronomical Society
ISSN :
0035-8711
eISSN :
1365-2966
Publisher :
OUP
Volume :
547
Pages :
stag448
Peer reviewed :
Peer Reviewed verified by ORBi
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