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
2022
unknown
Zugriff:
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.
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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
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| Autor/in / Beteiligte Person: | Barragan, O. ; Armstrong, D. J. ; Gandolfi, D. ; Carleo, I ; Vidotto, A. A. ; D'Angelo, C. Villarreal ; Oklopcic, A. ; Isaacson, H. ; Oddo, D. ; Collins, K. ; Fridlund, Malcolm ; Sousa, S. G. ; Persson, Carina ; Hellier, C. ; Howell, S. ; Howard, A. ; Redfield, S. ; Eisner, N. ; Georgieva, Iskra ; Dragomir, D. ; Bayliss, D. ; Nielsen, L. D. ; Klein, B. ; Aigrain, S. ; Zhang, M. ; Teske, J. ; Twicken, J. D. ; Jenkins, J. ; Esposito, M. ; Van Eylen, V. ; Rodler, F. ; Adibekyan, V ; Alarcon, J. ; Anderson, D. R. ; Murphy, J. M. Akana ; Barrado, D. ; Barros, S. C. C. ; Benneke, B. ; Bouchy, F. ; Bryant, E. M. ; Butler, R. P. ; Burt, J. ; Cabrera, J. ; Casewell, S. ; Chaturvedi, P. ; Cloutier, R. ; Cochran, W. D. ; Crane, J. ; Crossfield, I ; Crouzet, N. ; Collins ; Dai, F. ; Deeg, H. J. ; Deline, A. ; Demangeon, O. D. S. ; Dumusque, X. ; Figueira, P. ; Furlan, E. ; Gnilka, C. ; Goad, M. R. ; Goffo, E. ; Gutierrez-Canales, F. ; Hadjigeorghiou, A. ; Hartman, Z. ; Hatzes, A. P. ; Harris, M. ; Henderson, B. ; Hirano, T. ; Hojjatpanah, S. ; Hoyer, S. ; Kabath, P. ; Korth, Judith ; Lillo-Box, J. ; Luque, R. ; Marmier, M. ; Mocnik, T. ; Muresan, Alexandra ; 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. ; Shectman, S. ; Seager, S. ; Segransan, D. ; Serrano, L. M. ; Skarka, M. ; Smith, A. M. S. ; Subjak, J. ; Tan, T. G. ; Udry, S. ; Watson, C. ; Wheatley, P. J. ; West, R. ; Winn, J. N. ; Wang, S. X. ; Wolfgang, A. ; Ziegler, C. |
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| Veröffentlichung: | 2022 |
| Medientyp: | unknown |
| DOI: | 10.1093/mnras/stac638 |
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