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

  title={The young HD 73583 (TOI-560) planetary system: Two 10-M\$\_\oplus\$ mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf},
  author={O. Barrag'an and David J Armstrong and D Gandolfi and Ilaria Carleo and Aline A. Vidotto and Carolina Villarreal D’Angelo and Antonija Oklopvci'c and Howard T. Isaacson and Daniele Oddo and Kevin I. Collins and M. Fridlund and S{\'e}rgio G. Sousa and Carina M. Persson and Coel Hellier and S. Howell and Andrew W. Howard and Stephen Redfield and Nora L. Eisner and Iskra Georgieva and Diana Dragomir and Daniel Bayliss and Louise D. Nielsen and Baptiste Klein and Suzanne Aigrain and M. Zhang and Johanna K. Teske and Joseph D. Twicken and Jon M. Jenkins and M. Esposito and Vincent Van Eylen and Florian Rodler and Vardan Adibekyan and Javier Alarcon and D. R. Anderson and J. M. Akana Murphy and David Barrado and Susana C. C. Barros and Bj{\"o}rn Benneke and F. Bouchy and Edward M. Bryant and Paul Butler and Jennifer A. Burt and J. Cabrera and Sarah L. Casewell and Priyanka Chaturvedi and Ryan Cloutier and William D. Cochran and J. D. Crane and Ian J. M. Crossfield and Nicolas Crouzet and Kevin I. Collins and Fei Dai and Hans J. Deeg and Adrien Deline and Olivier D. S. Demangeon and Xavier Dumusque and Pedro Figueira and Elise Furlan and Crystal L. Gnilka and M. R. Goad and Elisa Goffo and Fernando Guti'errez-Canales and A. Hadjigeorghiou and Zachary D. Hartman and A. P. Hatzes and M. Harris and Beth A. Henderson and T Hirano and S. Hojjatpanah and Sergio Hoyer and Petr Kab'ath and John Korth and Jorge Lillo-Box and Rafael Luque and Maxime Marmier and Teo Movcnik and A. Muresan and Felipe Murgas and Evangelos Nagel and H L M Osborne and Ares Osborn and H. P. Osborn and Enric Pall{\'e} and M. Raimbault and George R. Ricker and Ryan A. Rubenzahl and Christopher Stockdale and N. C. Santos and Nicholas J. Scott and Richard P. Schwarz and Stephen A. Shectman and Sara Seager and Damien S'egransan and Luisa Maria Serrano and Marek Skarka and A M S Smith and J'an vSubjak and T. G. Tan and St{\'e}phane Udry and C. Watson and Peter J. Wheatley and Richard G. West and Joshua N. Winn and S. X. Wang and Angie Wolfgang and Carl A. Ziegler},
We present the disco v ery 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 (cid:3) and 0.65 ± 0.02 R (cid:3) , respectively… 

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