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

    arXiv.org, 03/2022
    Paper

    We present the discovery and characterisation of two transiting planets observed by \textit{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 (\(\sim 500\)~Myr) active star with a rotational period of \(12.08 \pm 0.11 \)\,d, and a mass and radius of \( 0.73 \pm 0.02 M_\odot\) and \(0.65 \pm 0.02 R_\odot\), respectively. HD73583 b (\(P_b=6.3980420 _{ - 0.0000062 }^{+0.0000067}\) d) has a mass and radius of \(10.2 _{-3.1}^{+3.4} M_\oplus\) and\(2.79 \pm 0.10 R_\oplus\), respectively, that gives a density of \(2.58 _{-0.81}^{ 0.95} {\rm g\,cm^{-3}}\). HD73583 c (\(P_c= 18.87974 _{-0.00074 }^{+0.00086}\)) has a mass and radius of \(9.7_{-1.7} ^ {+1.8} M_\oplus\) and \(2.39_{-0.09}^{+0.10} R_\oplus\), respectively, this 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.