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
Journal article, 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.
techniques: radial velocities
planets and satellites: individual: HD 73583 (TOI-560)
stars: activity
techniques: photometric
Author
O. Barragan
University of Oxford
D. J. Armstrong
The University of Warwick
D. Gandolfi
University of Turin
I Carleo
Indiana University
A. A. Vidotto
Leiden University
C. Villarreal D'Angelo
Instituto de Astronomía Teórica y Experimental (IATE)
A. Oklopcic
University of Amsterdam
H. Isaacson
University of California
D. Oddo
University of New Mexico
K. Collins
Harvard-Smithsonian Center for Astrophysics
Malcolm Fridlund
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
S. G. Sousa
University of Porto
Carina Persson
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
C. Hellier
Keele University
S. Howell
National Aeronautics and Space Administration (NASA)
A. Howard
University of California
S. Redfield
Wesleyan University
N. Eisner
University of Oxford
Iskra Georgieva
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
D. Dragomir
University of New Mexico
D. Bayliss
The University of Warwick
L. D. Nielsen
University of Oxford
University of Geneva
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
National Aeronautics and Space Administration (NASA)
SETI Institute
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
University of Porto
J. Alarcon
European Southern Observatory Santiago
D. R. Anderson
The University of Warwick
J. M. Akana Murphy
University of California
D. Barrado
Spanish National Research Council (CSIC)
S. C. C. Barros
University of Porto
B. Benneke
Université de Montréal
F. Bouchy
University of Geneva
E. M. Bryant
The University of Warwick
R. P. Butler
Carnegie Institution for Science
J. Burt
California Institute of Technology (Caltech)
J. Cabrera
German Aerospace Center (DLR)
S. Casewell
University Of Leicester
P. Chaturvedi
Thüringer Landessternwarte Tautenburg
R. Cloutier
Harvard-Smithsonian Center for Astrophysics
W. D. Cochran
University of Texas
J. Crane
Carnegie Observatories
I Crossfield
University of Kansas
N. Crouzet
European Space Agency (ESA)
Collins
George Mason University
F. Dai
Massachusetts Institute of Technology (MIT)
Princeton University
H. J. Deeg
Instituto de Astrofísica de Canarias
University of La Laguna
A. Deline
University of Geneva
O. D. S. Demangeon
University of Porto
X. Dumusque
University of Geneva
P. Figueira
European Southern Observatory Santiago
University of Porto
E. Furlan
California Institute of Technology (Caltech)
C. Gnilka
California Institute of Technology (Caltech)
M. R. Goad
University Of Leicester
E. Goffo
University of Turin
Thüringer Landessternwarte Tautenburg
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 University
S. Hoyer
Aix Marseille University
P. Kabath
Czech Academy of Sciences
Judith Korth
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
J. Lillo-Box
Centro de Astrobiologia (CAB)
R. Luque
Spanish National Research Council (CSIC)
M. Marmier
University of Geneva
T. Mocnik
NSF's National Optical-Infrared Astronomy Research Laboratory (NOIRLab)
Alexandra Muresan
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
F. Murgas
University of 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
Massachusetts Institute of Technology (MIT)
University of Bern
E. Palle
Instituto de Astrofísica de Canarias
University of La Laguna
M. Raimbault
University of Geneva
G. R. Ricker
Massachusetts Institute of Technology (MIT)
R. A. Rubenzahl
California Institute of Technology (Caltech)
C. Stockdale
Hazelwood Observatory
N. C. Santos
University of 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
University of Geneva
L. M. Serrano
University of Turin
M. Skarka
Czech Academy of Sciences
Masaryk University
A. M. S. Smith
University Of Leicester
J. Subjak
Charles University
Czech Academy of Sciences
T. G. Tan
Curtin University
Perth Exoplanet Survey Telescope
S. Udry
University of Geneva
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 1606-1627Subject Categories (SSIF 2011)
Subatomic Physics
Astronomy, Astrophysics and Cosmology
Other Physics Topics
DOI
10.1093/mnras/stac638