The young HD 73583 (TOI-560) planetary system: two 10-M-circle plus mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
Artikel i vetenskaplig tidskrift, 2022
We present the discovery and characterization of two transiting planets observed by TESS in the light curves of the young and bright (V = 9.67) star HD73583 (TOI-560). We perform an intensive spectroscopic and photometric space- and ground-based follow-up in order to confirm and characterize the system. We found that HD73583 is a young (similar to 500 Myr) active star with a rotational period of 12.08 +/- 0.11 d, and a mass and radius of 0.73 +/- 0.02 M-circle dot and 0.65 +/- 0.02 R-circle dot, respectively. HD 73583 b (P-b = 6.3980420(-0.0000062)(+0.0000067 )d) has a mass and radius of 10.2(-3.1)(+3.4) M-circle plus and 2.79 +/- 0.10 R-circle plus, respectively, which gives a density of 2.58(-0.81)(+0.95) g cm(-3). HD 73583 c (P-c = 18.87974(-0.00074)(+0.00086) d) has a mass and radius of 9.7(-1.7)(+1.8) M-circle plus and 2.39(-0.09)(+0.10) R-circle plus, respectively, which translates to a density of 3.88(-0.80)(+0.91) g cm(-3). Both planets are consistent with worlds made of a solid core surrounded by a volatile envelope. Because of their youth and host star brightness, they both are excellent candidates to perform transmission spectroscopy studies. We expect ongoing atmospheric mass-loss for both planets caused by stellar irradiation. We estimate that the detection of evaporating signatures on H and He would be challenging, but doable with present and future instruments.
stars: activity
techniques: radial velocities
techniques: photometric
planets and satellites: individual: HD 73583 (TOI-560)
Författare
O. Barragan
University of Oxford
D. J. Armstrong
The University of Warwick
D. Gandolfi
Universita degli Studi di Torino
I Carleo
Indiana University
A. A. Vidotto
Universiteit Leiden
C. Villarreal D'Angelo
Instituto de Astronomía Teórica y Experimental (IATE)
A. Oklopcic
Universiteit Van Amsterdam
H. Isaacson
University of California at Berkeley
D. Oddo
University of New Mexico
K. Collins
Harvard-Smithsonian Center for Astrophysics
Malcolm Fridlund
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
S. G. Sousa
Universidade do Porto
Carina Persson
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
C. Hellier
Keele University
S. Howell
National Aeronautics and Space Administration (NASA)
A. Howard
University of California at Berkeley
S. Redfield
Wesleyan University
N. Eisner
University of Oxford
Iskra Georgieva
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
D. Dragomir
University of New Mexico
D. Bayliss
The University of Warwick
L. D. Nielsen
Université de Genève
University of Oxford
B. Klein
University of Oxford
S. Aigrain
University of Oxford
M. Zhang
California Institute of Technology (Caltech)
J. Teske
Carnegie Institution for Science
J. D. Twicken
SETI Institute
National Aeronautics and Space Administration (NASA)
J. Jenkins
National Aeronautics and Space Administration (NASA)
M. Esposito
Thüringer Landessternwarte Tautenburg
V. Van Eylen
University College London (UCL)
F. Rodler
European Southern Observatory Santiago
V Adibekyan
Universidade do Porto
J. Alarcon
European Southern Observatory Santiago
D. R. Anderson
The University of Warwick
J. M. Akana Murphy
University of California at Santa Cruz
D. Barrado
Consejo Superior de Investigaciones Científicas (CSIC)
S. C. C. Barros
Universidade do Porto
B. Benneke
Université de Montréal
F. Bouchy
Université de Genève
E. M. Bryant
The University of Warwick
R. P. Butler
Carnegie Institution for Science
J. Burt
California Institute of Technology (Caltech)
J. Cabrera
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
S. Casewell
University Of Leicester
P. Chaturvedi
Thüringer Landessternwarte Tautenburg
R. Cloutier
Harvard-Smithsonian Center for Astrophysics
W. D. Cochran
The University of Texas at Austin
J. Crane
Carnegie Observatories
I Crossfield
University of Kansas
N. Crouzet
European Space Research and Technology Centre (ESA ESTEC)
Collins
George Mason University
F. Dai
Princeton University
Massachusetts Institute of Technology (MIT)
H. J. Deeg
Universidad de la Laguna
Instituto de Astrofísica de Canarias
A. Deline
Université de Genève
O. D. S. Demangeon
Universidade do Porto
X. Dumusque
Université de Genève
P. Figueira
European Southern Observatory Santiago
Universidade do Porto
E. Furlan
California Institute of Technology (Caltech)
C. Gnilka
California Institute of Technology (Caltech)
M. R. Goad
University Of Leicester
E. Goffo
Thüringer Landessternwarte Tautenburg
Universita degli Studi di Torino
F. Gutierrez-Canales
Universidad de Guanajuato
A. Hadjigeorghiou
The University of Warwick
Z. Hartman
NSF's National Optical-Infrared Astronomy Research Laboratory (NOIRLab)
A. P. Hatzes
Thüringer Landessternwarte Tautenburg
M. Harris
University of New Mexico
B. Henderson
University Of Leicester
T. Hirano
National Institutes of Natural Sciences
Astrobiology Center, Japan
S. Hojjatpanah
Aix-Marseille Université
S. Hoyer
Aix-Marseille Université
P. Kabath
Czech Academy of Sciences
Judith Korth
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
J. Lillo-Box
Centro de Astrobiologia (CAB)
R. Luque
Consejo Superior de Investigaciones Científicas (CSIC)
M. Marmier
Université de Genève
T. Mocnik
NSF's National Optical-Infrared Astronomy Research Laboratory (NOIRLab)
Alexandra Muresan
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
F. Murgas
Universidad de la Laguna
Instituto de Astrofísica de Canarias
E. Nagel
Universidad de Guanajuato
H. L. M. Osborne
University College London (UCL)
A. Osborn
The University of Warwick
H. P. Osborn
Universität Bern
Massachusetts Institute of Technology (MIT)
E. Palle
Universidad de la Laguna
Instituto de Astrofísica de Canarias
M. Raimbault
Université de Genève
G. R. Ricker
Massachusetts Institute of Technology (MIT)
R. A. Rubenzahl
California Institute of Technology (Caltech)
C. Stockdale
Hazelwood Observatory
N. C. Santos
Universidade do Porto
N. Scott
National Aeronautics and Space Administration (NASA)
R. P. Schwarz
Patashnick Voorheesville Observatory
S. Shectman
Carnegie Observatories
S. Seager
Massachusetts Institute of Technology (MIT)
D. Segransan
Université de Genève
L. M. Serrano
Universita degli Studi di Torino
M. Skarka
Czech Academy of Sciences
Masarykova Univerzita
A. M. S. Smith
University Of Leicester
J. Subjak
Univerzita Karlova
Czech Academy of Sciences
T. G. Tan
Curtin University
Perth Exoplanet Survey Telescope
S. Udry
Université de Genève
C. Watson
Queen's University Belfast
P. J. Wheatley
The University of Warwick
R. West
The University of Warwick
J. N. Winn
Princeton University
S. X. Wang
Tsinghua University
A. Wolfgang
SiteZeus
C. Ziegler
Stephen F. Austin State University
Monthly Notices of the Royal Astronomical Society
0035-8711 (ISSN) 1365-2966 (eISSN)
Vol. 514 2 1606-1627Ämneskategorier (SSIF 2011)
Subatomär fysik
Astronomi, astrofysik och kosmologi
Annan fysik
DOI
10.1093/mnras/stac638