2022MNRAS.514.1606B

Query : 2022MNRAS.514.1606B

2022MNRAS.514.1606B - Mon. Not. R. Astron. Soc., 514, 1606-1627 (2022/August-1)

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

BARRAGAN O., ARMSTRONG D.J., GANDOLFI D., CARLEO I., VIDOTTO A.A., VILLARREAL D'ANGELO C., OKLOPCIC A., ISAACSON H., ODDO D., COLLINS K., FRIDLUND M., SOUSA S.G., PERSSON C.M., HELLIER C., HOWELL S., HOWARD A., REDFIELD S., EISNER N., 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., VAN EYLEN V., RODLER F., ADIBEKYAN V., ALARCON J., ANDERSON D.R., MURPHY J.M.A., 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 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., GUTIERREZ-CANALES F., HADJIGEORGHIOU A., HARTMAN Z., HATZES A.P., HARRIS M., HENDERSON B., HIRANO T., HOJJATPANAH S., HOYER S., KABATH P., KORTH J., LILLO-BOX J., LUQUE R., MARMIER M., MOCNIK 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., SHECTMAN S., RAIMBAULT M., 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. and ZIEGLER C.

Abstract (from CDS):

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 (P_b = 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^ 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_⊕ and 2.39 _- 0.09_ ^+ 0.10^ R_⊕, 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.

Abstract Copyright: © The Author(s) 2022. Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: individual: HD 73583 (TOI-560) - stars: activity

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 14

Full paper

View the references in ADS

Number of rows : 14

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	* eps Eri	BY*	03 32 55.8444911587	-09 27 29.739493865	5.19	4.61	3.73	3.00	2.54	K2V	2073	1
2	CD-38 1467b	Pl	04 11 51.9468918168	-37 56 23.219155140						~	15	0
3	HD 63433c	Pl	07 49 55.0606576176	+27 21 47.457467316						~	65	0
4	HD 63433b	Pl	07 49 55.0606576176	+27 21 47.457467316						~	69	0
5	K2-100b	Pl	08 38 24.3002838928	+20 06 21.828057218						~	83	0
6	HD 73583b	Pl	08 38 45.2603894280	-13 15 24.092462772						~	57	0
7	HD 73583c	Pl	08 38 45.2603894280	-13 15 24.092462772						~	21	0
8	HD 73583	PM*	08 38 45.2603894280	-13 15 24.092462772		10.732	9.708	9.736		K4+Vk:	120	0
9	HD 85512	PM*	09 51 07.0518026760	-43 30 10.023686079	9.963	8.83	7.651	6.934	6.319	K6Vk:	250	1
10	BD+39 2643b	Pl	13 25 07.9957316160	+38 55 20.944920864						~	41	0
11	BD+40 2790b	Pl	14 29 34.2426073536	+39 47 25.543283496						~	48	0
12	Kepler-78b	Pl	19 34 58.0137407208	+44 26 53.960186940						~	153	1
13	HD 197481b	Pl	20 45 09.5324974119	-31 20 27.237889841						~	158	0
14	HD 197481c	Pl	20 45 09.5324974119	-31 20 27.237889841						~	82	0

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