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

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

doi:10.1093/mnras/stac638

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

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

^*Corresponding author for this work

School of Mathematics and Physics

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Abstract

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 (∼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, which gives a density of $2.58 _{ - 0.81 } ^ { + 0.95 }$ ${\rm g\, cm^{-3}}$. 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, which translates to a density of $3.88 _{ - 0.80 } ^ { + 0.91 }$ ${\rm g\, cm^{-3}}$. 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.

Original language	English
Pages (from-to)	1606-1627
Number of pages	22
Journal	Monthly Notices of the Royal Astronomical Society
Volume	514
Issue number	2
Early online date	15 Mar 2022
DOIs	https://doi.org/10.1093/mnras/stac638
Publication status	Published - Aug 2022

Keywords

Space and Planetary Science
Astronomy and Astrophysics

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The young HD 73583 (TOI-560) planetary system: two 10-M⊕ mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
Copyright 2022 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.
Final published version, 6.27 MBLicence: CC BY

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Barragán, O., Armstrong, D. J., Gandolfi, D., Carleo, I., Vidotto, A. A., Villarreal D’Angelo, C., Oklopčić, A., Isaacson, H., Oddo, D., Collins, K. I., Fridlund, M., Sousa, S. G., Persson, C. M., Hellier, C., Howell, S., Howard, A., Redfield, S., Eisner, N., Georgieva, I. Y., ... Ziegler, C. (2022). 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, 514(2), 1606-1627. https://doi.org/10.1093/mnras/stac638

@article{7becdd7b7dd541d98fd28d57df2b2b02,

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

abstract = "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 (∼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 \} \textasciicircum{} \{ + 0.0000067 \}\$ d) has a mass and radius of \$10.2 \_\{ - 3.1 \} \textasciicircum{} \{ + 3.4 \}\$ M⊕ and 2.79 ± 0.10 R⊕, respectively, which gives a density of \$2.58 \_\{ - 0.81 \} \textasciicircum{} \{ + 0.95 \}\$ \$\{\textbackslash{}rm g\textbackslash{}, cm\textasciicircum{}\{-3\}\}\$. HD 73583 c (Pc = \$18.87974 \_\{ - 0.00074 \} \textasciicircum{} \{ + 0.00086 \}\$ d) has a mass and radius of \$9.7 \_\{ - 1.7 \} \textasciicircum{} \{ + 1.8 \}\$ M⊕ and \$2.39 \_\{ - 0.09 \} \textasciicircum{} \{ + 0.10 \}\$ R⊕, respectively, which translates to a density of \$3.88 \_\{ - 0.80 \} \textasciicircum{} \{ + 0.91 \}\$ \$\{\textbackslash{}rm g\textbackslash{}, cm\textasciicircum{}\{-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.",

keywords = "Space and Planetary Science, Astronomy and Astrophysics",

author = "O Barrag{\'a}n and Armstrong, \{D J\} and D Gandolfi and I Carleo and Vidotto, \{A A\} and C Villarreal D{\textquoteright}Angelo and A Oklop{\v c}i{\'c} and H Isaacson and D Oddo and Collins, \{K I\} and M Fridlund and Sousa, \{S G\} and Persson, \{C M\} and C Hellier and S Howell and A Howard and S Redfield and N Eisner and Georgieva, \{I Y\} and D Dragomir and D Bayliss and Nielsen, \{L D\} and B Klein and S Aigrain and M Zhang and J Teske and Twicken, \{J D\} and J Jenkins and M Esposito and V Van Eylen and F Rodler and V Adibekyan and J Alarcon and Anderson, \{D R\} and Akana Murphy, \{J M\} and D Barrado and Barros, \{S C C\} and B Benneke and F Bouchy and Bryant, \{E M\} and Butler, \{R P\} and J Burt and J Cabrera and S Casewell and P Chaturvedi and R Cloutier and Cochran, \{W D\} and J Crane and I Crossfield and N Crouzet and Collins, \{K I\} and F Dai and Deeg, \{H J\} and A Deline and Demangeon, \{O D S\} and X Dumusque and P Figueira and E Furlan and C Gnilka and Goad, \{M R\} and E Goffo and F Guti{\'e}rrez-Canales and A Hadjigeorghiou and Z Hartman and Hatzes, \{A P\} and M Harris and B Henderson and T Hirano and S Hojjatpanah and S Hoyer and P Kab{\'a}th and J Korth and J Lillo-Box and R Luque and M Marmier and T Mo{\v c}nik and A Muresan and F Murgas and E Nagel and Osborne, \{H L M\} and A Osborn and Osborn, \{H P\} and E Palle and M Raimbault and Ricker, \{G R\} and Rubenzahl, \{R A\} and C Stockdale and Santos, \{N C\} and N Scott and Schwarz, \{R P\} and S Shectman and M Raimbault and S Seager and D S{\'e}gransan and Serrano, \{L M\} and M Skarka and Smith, \{A M S\} and J {\v S}ubjak and Tan, \{T G\} and S Udry and C Watson and Wheatley, \{P J\} and R West and Winn, \{J N\} and Wang, \{S X\} and A Wolfgang and C Ziegler",

year = "2022",

month = aug,

doi = "10.1093/mnras/stac638",

language = "English",

volume = "514",

pages = "1606--1627",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "2",

}

Barragán, O, Armstrong, DJ, Gandolfi, D, Carleo, I, Vidotto, AA, Villarreal D’Angelo, C, Oklopčić, A, Isaacson, H, Oddo, D, Collins, KI, Fridlund, M, Sousa, SG, Persson, CM, Hellier, C, Howell, S, Howard, A, Redfield, S, Eisner, N, Georgieva, IY, Dragomir, D, Bayliss, D, Nielsen, LD, Klein, B, Aigrain, S, Zhang, M, Teske, J, Twicken, JD, Jenkins, J, Esposito, M, Van Eylen, V, Rodler, F, Adibekyan, V, Alarcon, J, Anderson, DR, Akana Murphy, JM, Barrado, D, Barros, SCC, Benneke, B, Bouchy, F, Bryant, EM, Butler, RP, Burt, J, Cabrera, J, Casewell, S, Chaturvedi, P, Cloutier, R, Cochran, WD, Crane, J, Crossfield, I, Crouzet, N, Collins, KI, Dai, F, Deeg, HJ, Deline, A, Demangeon, ODS, Dumusque, X, Figueira, P, Furlan, E, Gnilka, C, Goad, MR, Goffo, E, Gutiérrez-Canales, F, Hadjigeorghiou, A, Hartman, Z, Hatzes, AP, Harris, M, Henderson, B, Hirano, T, Hojjatpanah, S, Hoyer, S, Kabáth, P, Korth, J, Lillo-Box, J, Luque, R, Marmier, M, Močnik, T, Muresan, A, Murgas, F, Nagel, E, Osborne, HLM, Osborn, A, Osborn, HP, Palle, E, Raimbault, M, Ricker, GR, Rubenzahl, RA, Stockdale, C, Santos, NC, Scott, N, Schwarz, RP, Shectman, S, Raimbault, M, Seager, S, Ségransan, D, Serrano, LM, Skarka, M, Smith, AMS, Šubjak, J, Tan, TG, Udry, S, Watson, C, Wheatley, PJ, West, R, Winn, JN, Wang, SX, Wolfgang, A & Ziegler, C 2022, '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, vol. 514, no. 2, pp. 1606-1627. https://doi.org/10.1093/mnras/stac638

TY - JOUR

T1 - The young HD 73583 (TOI-560) planetary system: two 10-M⊕ mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf

AU - Barragán, O

AU - Armstrong, D J

AU - Gandolfi, D

AU - Carleo, I

AU - Vidotto, A A

AU - Villarreal D’Angelo, C

AU - Oklopčić, A

AU - Isaacson, H

AU - Oddo, D

AU - Collins, K I

AU - Fridlund, M

AU - Sousa, S G

AU - Persson, C M

AU - Hellier, C

AU - Howell, S

AU - Howard, A

AU - Redfield, S

AU - Eisner, N

AU - Georgieva, I Y

AU - Dragomir, D

AU - Bayliss, D

AU - Nielsen, L D

AU - Klein, B

AU - Aigrain, S

AU - Zhang, M

AU - Teske, J

AU - Twicken, J D

AU - Jenkins, J

AU - Esposito, M

AU - Van Eylen, V

AU - Rodler, F

AU - Adibekyan, V

AU - Alarcon, J

AU - Anderson, D R

AU - Akana Murphy, J M

AU - Barrado, D

AU - Barros, S C C

AU - Benneke, B

AU - Bouchy, F

AU - Bryant, E M

AU - Butler, R P

AU - Burt, J

AU - Cabrera, J

AU - Casewell, S

AU - Chaturvedi, P

AU - Cloutier, R

AU - Cochran, W D

AU - Crane, J

AU - Crossfield, I

AU - Crouzet, N

AU - Collins, K I

AU - Dai, F

AU - Deeg, H J

AU - Deline, A

AU - Demangeon, O D S

AU - Dumusque, X

AU - Figueira, P

AU - Furlan, E

AU - Gnilka, C

AU - Goad, M R

AU - Goffo, E

AU - Gutiérrez-Canales, F

AU - Hadjigeorghiou, A

AU - Hartman, Z

AU - Hatzes, A P

AU - Harris, M

AU - Henderson, B

AU - Hirano, T

AU - Hojjatpanah, S

AU - Hoyer, S

AU - Kabáth, P

AU - Korth, J

AU - Lillo-Box, J

AU - Luque, R

AU - Marmier, M

AU - Močnik, T

AU - Muresan, A

AU - Murgas, F

AU - Nagel, E

AU - Osborne, H L M

AU - Osborn, A

AU - Osborn, H P

AU - Palle, E

AU - Raimbault, M

AU - Ricker, G R

AU - Rubenzahl, R A

AU - Stockdale, C

AU - Santos, N C

AU - Scott, N

AU - Schwarz, R P

AU - Shectman, S

AU - Raimbault, M

AU - Seager, S

AU - Ségransan, D

AU - Serrano, L M

AU - Skarka, M

AU - Smith, A M S

AU - Šubjak, J

AU - Tan, T G

AU - Udry, S

AU - Watson, C

AU - Wheatley, P J

AU - West, R

AU - Winn, J N

AU - Wang, S X

AU - Wolfgang, A

AU - Ziegler, C

PY - 2022/8

Y1 - 2022/8

N2 - 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 (∼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, which gives a density of $2.58 _{ - 0.81 } ^ { + 0.95 }$ ${\rm g\, cm^{-3}}$. 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, which translates to a density of $3.88 _{ - 0.80 } ^ { + 0.91 }$ ${\rm g\, cm^{-3}}$. 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.

AB - 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 (∼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, which gives a density of $2.58 _{ - 0.81 } ^ { + 0.95 }$ ${\rm g\, cm^{-3}}$. 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, which translates to a density of $3.88 _{ - 0.80 } ^ { + 0.91 }$ ${\rm g\, cm^{-3}}$. 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.

KW - Space and Planetary Science

KW - Astronomy and Astrophysics

U2 - 10.1093/mnras/stac638

DO - 10.1093/mnras/stac638

M3 - Article

SN - 0035-8711

VL - 514

SP - 1606

EP - 1627

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 2

ER -

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

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