The young HD 73583 (TOI-560) planetary system: Two 10-M<SUB>⊕</SUB> mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf - Archive ouverte HAL Access content directly
Journal Articles Monthly Notices of the Royal Astronomical Society Year : 2022

The young HD 73583 (TOI-560) planetary system: Two 10-M mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf

, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , (1) , (1) , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
1
O. Barragán
  • Function : Author
D. J. Armstrong
  • Function : Author
D. Gandolfi
I. Carleo
  • Function : Author
A. A. Vidotto
  • Function : Author
C. Villarreal d'Angelo
  • Function : Author
A. Oklopčić
  • Function : Author
H. Isaacson
  • Function : Author
D. Oddo
  • Function : Author
M. Fridlund
S. G. Sousa
  • Function : Author
C. M. Persson
  • Function : Author
C. Hellier
  • Function : Author
S. Howell
  • Function : Author
A. Howard
  • Function : Author
S. Redfield
N. Eisner
  • Function : Author
I. Y. Georgieva
  • Function : Author
D. Dragomir
D. Bayliss
  • Function : Author
L. D. Nielsen
  • Function : Author
B. Klein
  • Function : Author
S. Aigrain
  • Function : Author
M. Zhang
  • Function : Author
J. Teske
  • Function : Author
J. D. Twicken
  • Function : Author
J. Jenkins
M. Esposito
  • Function : Author
V. van Eylen
  • Function : Author
F. Rodler
  • Function : Author
V. Adibekyan
  • Function : Author
J. Alarcon
  • Function : Author
D. R. Anderson
  • Function : Author
J. M. Akana Murphy
  • Function : Author
D. Barrado
  • Function : Author
S. C. C. Barros
  • Function : Author
B. Benneke
  • Function : Author
F. Bouchy
  • Function : Author
E. M. Bryant
  • Function : Author
R. P. Butler
  • Function : Author
J. Burt
  • Function : Author
J. Cabrera
  • Function : Author
S. Casewell
  • Function : Author
P. Chaturvedi
  • Function : Author
R. Cloutier
  • Function : Author
W. D. Cochran
  • Function : Author
J. Crane
  • Function : Author
I. Crossfield
  • Function : Author
N. Crouzet
K. I. Collins
  • Function : Author
F. Dai
  • Function : Author
H. J. Deeg
  • Function : Author
A. Deline
  • Function : Author
O. D. S. Demangeon
  • Function : Author
X. Dumusque
  • Function : Author
P. Figueira
  • Function : Author
E. Furlan
  • Function : Author
C. Gnilka
  • Function : Author
M. R. Goad
  • Function : Author
E. Goffo
  • Function : Author
F. Gutiérrez-Canales
  • Function : Author
A. Hadjigeorghiou
  • Function : Author
Z. Hartman
  • Function : Author
A. P. Hatzes
  • Function : Author
M. Harris
B. Henderson
  • Function : Author
T. Hirano
  • Function : Author
P. Kabáth
  • Function : Author
J. Korth
J. Lillo-Box
  • Function : Author
R. Luque
M. Marmier
  • Function : Author
T. Močnik
  • Function : Author
A. Muresan
  • Function : Author
F. Murgas
E. Nagel
  • Function : Author
H. L. M. Osborne
A. Osborn
  • Function : Author
H. P. Osborn
  • Function : Author
E. Palle
  • Function : Author
G. R. Ricker
  • Function : Author
R. A. Rubenzahl
  • Function : Author
C. Stockdale
  • Function : Author
N. C. Santos
  • Function : Author
N. Scott
  • Function : Author
R. P. Schwarz
  • Function : Author
S. Shectman
  • Function : Author
M. Raimbault
  • Function : Author
S. Seager
D. Ségransan
  • Function : Author
L. M. Serrano
M. Skarka
A. M. S. Smith
  • Function : Author
J. Šubjak
  • Function : Author
T. G. Tan
  • Function : Author
S. Udry
C. Watson
  • Function : Author
P. J. Wheatley
  • Function : Author
R. West
  • Function : Author
J. N. Winn
  • Function : Author
S. X. Wang
  • Function : Author
A. Wolfgang
  • Function : Author
C. Ziegler

Abstract

We present the discovery and characterisation 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 characterise the system. We found that HD73583 is a young (~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 and 0.65 ± 0.02 R, respectively. HD 73583 b (Pb =$6.3980420 _{ - 0.0000062 } ^ { + 0.0000067 }$ d) has a mass and radius of $10.2 _{ - 3.1 } ^ { + 3.4 }$ M and 2.79 ± 0.10 R, respectively, that gives a density of $2.58 _{ - 0.81 } ^ { + 0.95 }$ g cm-3. HD 73583 c (Pc=$18.87974 _{ - 0.00074 } ^ { + 0.00086 }$ d) has a mass and radius of $9.7 _{ - 1.7 } ^ { + 1.8 }$ M and $2.39 _{ - 0.09 } ^ { + 0.10 }$ R, respectively, this 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 on-going 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.

Dates and versions

insu-03667449 , version 1 (13-05-2022)

Identifiers

Cite

O. Barragán, D. J. Armstrong, D. Gandolfi, I. Carleo, A. A. Vidotto, et al.. The young HD 73583 (TOI-560) planetary system: Two 10-M mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf. Monthly Notices of the Royal Astronomical Society, 2022, ⟨10.1093/mnras/stac638⟩. ⟨insu-03667449⟩
9 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More