Precise mass and radius of a transiting super-Earth planet orbiting the M dwarf TOI-1235: a planet in the radius gap?
Artikel i vetenskaplig tidskrift, 2020
We report the confirmation of a transiting planet around the bright weakly active M0.5 V star TOI-1235 (TYC 4384-1735-1, V ≈ 11.5 mag), whose transit signal was detected in the photometric time series of sectors 14, 20, and 21 of the TESS space mission. We confirm the planetary nature of the transit signal, which has a period of 3.44 d, by using precise RV measurements with the CARMENES, HARPS-N, and iSHELL spectrographs, supplemented by high-resolution imaging and ground-based photometry. A comparison of the properties derived for TOI-1235 b with theoretical models reveals that the planet has a rocky composition, with a bulk density slightly higher than that of Earth. In particular, we measure a mass of Mp = 5.9 ± 0.6 M⊕ and a radius of Rp = 1.69 ± 0.08 R⊕, which together result in a density of ρp = 6.7- 1.1+ 1.3 g cm-3. When compared with other well-characterized exoplanetary systems, the particular combination of planetary radius and mass places our discovery in the radius gap, which is a transition region between rocky planets and planets with significant atmospheric envelopes. A few examples of planets occupying the radius gap are known to date. While the exact location of the radius gap for M dwarfs is still a matter of debate, our results constrain it to be located at around 1.7 R⊕ or larger at the insolation levels received by TOI-1235 b (~60 S⊕). This makes it an extremely interesting object for further studies of planet formation and atmospheric evolution.
techniques: photometric
stars: individual: TOI-1235
techniques: radial velocities
Astrophysics - Solar and Stellar Astrophysics
Astrophysics - Earth and Planetary Astrophysics
stars: late-type
Författare
P. Bluhm
Universität Heidelberg
R. Luque
Instituto de Astrofísica de Canarias
Universidad de la Laguna
N. Espinoza
Space Telescope Science Institute (STScI)
E. Palle
Instituto de Astrofísica de Canarias
Universidad de la Laguna
J. A. Caballero
Consejo Superior de Investigaciones Científicas (CSIC)
S. Dreizler
Georg-August-Universität Göttingen
J. Livingston
University of Tokyo
S. Mathur
Instituto de Astrofísica de Canarias
Universidad de la Laguna
A. Quirrenbach
Universität Heidelberg
S. Stock
Universität Heidelberg
V. Van Eylen
University College London (UCL)
G. Nowak
Universidad de la Laguna
Instituto de Astrofísica de Canarias
E. D. Lopez
National Aeronautics and Space Administration (NASA)
Szilard Csizmadia
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
M. Zapatero-Osorio
Consejo Superior de Investigaciones Científicas (CSIC)
P. Schöfer
Georg-August-Universität Göttingen
J. Lillo-Box
Consejo Superior de Investigaciones Científicas (CSIC)
M. Oshagh
Instituto de Astrofísica de Canarias
Universidad de la Laguna
E. González-Álvarez
Consejo Superior de Investigaciones Científicas (CSIC)
P. J. Amado
Consejo Superior de Investigaciones Científicas (CSIC)
D. Barrado
Consejo Superior de Investigaciones Científicas (CSIC)
V. J. S. Bejar
Instituto de Astrofísica de Canarias
Universidad de la Laguna
B. Cale
National Aeronautics and Space Administration (NASA)
P. Chaturvedi
Thüringer Landessternwarte Tautenburg
C. Cifuentes
Consejo Superior de Investigaciones Científicas (CSIC)
W. D. Cochran
The University of Texas at Austin
K. I. Collins
George Mason University
M. Cortés-Contreras
Consejo Superior de Investigaciones Científicas (CSIC)
E. Díez Alonso
Universidad de Oviedo
M. El Mufti
University of Khartoum
George Mason University
A. Ercolino
Campo Catino Astronomical Observatory
Malcolm Fridlund
Universiteit Leiden
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
E. Gaidos
University of Hawaii
R. A. Garcia
Université Paris-Saclay
Iskra Georgieva
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
L. Gonzalez-Cuesta
Instituto de Astrofísica de Canarias
Universidad de la Laguna
P. Guerra
Observatori Astronòmic Albanya
Artie P. Hatzes
Thüringer Landessternwarte Tautenburg
Th Henning
Max-Planck-Gesellschaft
E. Herrero
Consejo Superior de Investigaciones Científicas (CSIC)
D. Hidalgo
Instituto de Astrofísica de Canarias
Universidad de la Laguna
G. Isopi
Campo Catino Astronomical Observatory
S. V. Jeffers
Georg-August-Universität Göttingen
J. M. Jenkins
National Aeronautics and Space Administration (NASA)
E. L. N. Jensen
Swarthmore College
P. Kabath
Czech Academy of Sciences
A. Kaminski
Universität Heidelberg
J. Kemmer
Universität Heidelberg
Judith Korth
Universität zu Köln
D. Kossakowski
Max-Planck-Gesellschaft
M. Kürster
Max-Planck-Gesellschaft
M. Lafarga
Consejo Superior de Investigaciones Científicas (CSIC)
F. Mallia
Campo Catino Astronomical Observatory
D. Montes
Universidad Complutense de Madrid
J. C. Morales
Consejo Superior de Investigaciones Científicas (CSIC)
M. Morales-Calderon
Consejo Superior de Investigaciones Científicas (CSIC)
F. Murgas
Universidad de la Laguna
Instituto de Astrofísica de Canarias
N. Narita
Instituto de Astrofísica de Canarias
University of Tokyo
V. M. Passegger
Universität Hamburg
University of Oklahoma
S. Pedraz
CAHA - Centro Astronómico hispano Alemán, A.I.E.
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
P. Plavchan
George Mason University
H. Rauer
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Technische Universität Berlin
S. Redfield
Wesleyan University
S. Reffert
Universität Heidelberg
A. Reiners
Georg-August-Universität Göttingen
I Ribas
Consejo Superior de Investigaciones Científicas (CSIC)
G. Ricker
Massachusetts Institute of Technology (MIT)
C. Rodíguez-López
Consejo Superior de Investigaciones Científicas (CSIC)
A. R. G. Santos
Space Science Institute
S. Seager
Massachusetts Institute of Technology (MIT)
M. Schlecker
Max-Planck-Gesellschaft
A. Schweitzer
Universität Hamburg
Y. Shan
Georg-August-Universität Göttingen
M. G. Soto
Queen Mary University of London
J. Subjak
Czech Academy of Sciences
L. Tal-Or
Ariel University
Georg-August-Universität Göttingen
T. Trifonov
Max-Planck-Gesellschaft
S. Vanaverbeke
KU Leuven
AstroLAB IRIS
R. Vanderspek
Massachusetts Institute of Technology (MIT)
J. Wittrock
George Mason University
M. Zechmeister
Georg-August-Universität Göttingen
F. Zohrabi
Mississippi State University
Astronomy and Astrophysics
0004-6361 (ISSN) 1432-0746 (eISSN)
Vol. 639 A132Exoplaneter från rymden - CHEOPS och PLATO, ESA's nästa två missioner
Rymdstyrelsen (174/18), 2017-01-01 -- 2022-12-31.
Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Fundament
Grundläggande vetenskaper
DOI
10.1051/0004-6361/202038160