2021MNRAS.505.3361H

Query : 2021MNRAS.505.3361H

2021MNRAS.505.3361H - Mon. Not. R. Astron. Soc., 505, 3361-3379 (2021/August-2)

TOI-220 b: a warm sub-Neptune discovered by TESS.

HOYER S., GANDOLFI D., ARMSTRONG D.J., DELEUIL M., ACUNA L., DE MEDEIROS J.R., GOFFO E., LILLO-BOX J., DELGADO MENA E., LOPEZ T.A., SANTERNE A., SOUSA S., FRIDLUND M., ADIBEKYAN V., COLLINS K.A., SERRANO L.M., CORTES-ZULETA P., HOWELL S.B., DEEG H., AGUICHINE A., BARRAGAN O., BRYANT E.M., CANTO MARTINS B.L., COLLINS K.I., COOKE B.F., DIAZ R.F., ESPOSITO M., FURLAN E., HOJJATPANAH S., JACKMAN J., JENKINS J.M., JENSEN E.L.N., LATHAM D.W., LEAO I.C., MATSON R.A., NIELSEN L.D., OSBORN A., OTEGI J.F., RODLER F., SABOTTA S., SCOTT N.J., SEAGER S., STOCKDALE C., STROM P.A., VANDERSPEK R., VAN EYLEN V., WHEATLEY P.J., WINN J.N., ALMENARA J.M., BARRADO D., BARROS S.C.C., BAYLISS D., BOUCHY F., BOYD P.T., CABRERA J., COCHRAN W.D., DEMANGEON O., DOTY J.P., DUMUSQUE X., FIGUEIRA P., FONG W., GRZIWA S., HATZES A.P., KABATH P., KNUDSTRUP E., KORTH J., LIVINGSTON J.H., LUQUE R., MOUSIS O., MULLALLY S.E., OSBORN H.P., PALLE E., PERSSON C.M., REDFIELD S., SANTOS N.C., SMITH J., SUBJAK J., TWICKEN J.D., UDRY S. and YAHALOMI D.A.

Abstract (from CDS):

In this paper, we report the discovery of TOI-220 b, a new sub-Neptune detected by the Transiting Exoplanet Survey Satellite (TESS) and confirmed by radial velocity follow-up observations with the HARPS spectrograph. Based on the combined analysis of TESS transit photometry and high precision radial velocity measurements, we estimate a planetary mass of 13.8 ± 1.0 M⊕ and radius of 3.03 ± 0.15 R⊕, implying a bulk density of 2.73 ± 0.47 gcm–3. TOI-220 b orbits a relative bright (V= 10.4) and old (10.1 ± 1.4 Gyr) K dwarf star with a period of ∼10.69 d. Thus, TOI-220 b is a new warm sub-Neptune with very precise mass and radius determinations. A Bayesian analysis of the TOI-220 b internal structure indicates that due to the strong irradiation it receives, the low density of this planet could be explained with a steam atmosphere in radiative-convective equilibrium and a supercritical water layer on top of a differentiated interior made of a silicate mantle and a small iron core.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: radial velocities - planets and satellites: fundamental parameters - planets and satellites: individual: TYC 8897-01263-1 - stars: fundamental parameters

Simbad objects: 2

goto Full paper

goto View the references in ADS

Number of rows : 2
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 CD-61 1276b Pl 06 07 11.9668124424 -61 59 48.895856412           ~ 13 0
2 CD-61 1276 PM* 06 07 11.9668124424 -61 59 48.895856412   11.29 10.47 9.95 9.571 K0V 35 0

To bookmark this query, right click on this link: simbad:objects in 2021MNRAS.505.3361H and select 'bookmark this link' or equivalent in the popup menu