SIMBAD references

2022MNRAS.511.1043W - Mon. Not. R. Astron. Soc., 511, 1043-1071 (2022/March-3)

A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS.

WILSON T.G., GOFFO E., ALIBERT Y., GANDOLFI D., BONFANTI A., PERSSON C.M., COLLIER CAMERON A., FRIDLUND M., FOSSATI L., KORTH J., BENZ W., DELINE A., FLOREN H.-G., GUTERMAN P., ADIBEKYAN V., HOOTON M.J., HOYER S., LELEU A., MUSTILL A.J., SALMON S., SOUSA S.G., SUAREZ O., ABE L., AGABI A., ALONSO R., ANGLADA G., ASQUIER J., BARCZY T., BARRADO NAVASCUES D., BARROS S.C.C., BAUMJOHANN W., BECK M., BECK T., BILLOT N., BONFILS X., BRANDEKER A., BROEG C., BRYANT E.M., BURLEIGH M.R., BUTTU M., CABRERA J., CHARNOZ S., CIARDI D.R., CLOUTIER R., COCHRAN W.D., COLLINS K.A., COLON K.D., CROUZET N., CSIZMADIA S., DAVIES M.B., DELEUIL M., DELREZ L., DEMANGEON O., DEMORY B.-O., DRAGOMIR D., DRANSFIELD G., EHRENREICH D., ERIKSON A., FORTIER A., GAN T., GILL S., GILLON M., GNILKA C.L., GRIEVES N., GRZIWA S., GUDEL M., GUILLOT T., HALDEMANN J., HENG K., HORNE K., HOWELL S.B., ISAAK K.G., JENKINS J.M., JENSEN E.L.N., KISS L., LACEDELLI G., LAM K., LASKAR J., LATHAM D.W., LECAVELIER DES ETANGS A., LENDL M., LESTER K.V., LEVINE A.M., LIVINGSTON J., LOVIS C., LUQUE R., MAGRIN D., MARIE-SAINTE W., MAXTED P.F.L., MAYO A.W., McLEAN B., MECINA M., MEKARNIA D., NASCIMBENI V., NIELSEN L.D., OLOFSSON G., OSBORN H.P., OSBORNE H.L.M., OTTENSAMER R., PAGANO I., PALLE E., PETER G., PIOTTO G., POLLACCO D., QUELOZ D., RAGAZZONI R., RANDO N., RAUER H., REDFIELD S., RIBAS I., RICKER G.R., RIEDER M., SANTOS N.C., SCANDARIATO G., SCHMIDER F.-X., SCHWARZ R.P., SCOTT N.J., SEAGER S., SEGRANSAN D., SERRANO L.M., SIMON A.E., SMITH A.M.S., STELLER M., STOCKDALE C., SZABO G., THOMAS N., TING E.B., TRIAUD A.H.M.J., UDRY S., VAN EYLEN V., VAN GROOTEL V., VANDERSPEK R.K., VIOTTO V., WALTON N. and WINN J.N.

Abstract (from CDS):

We report the discovery and characterization of a pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 (TIC 79748331), initially detected in the Transiting Exoplanet Survey Satellite (TESS) photometry. To characterize the system, we performed and retrieved the CHaracterising ExOPlanets Satellite (CHEOPS), TESS, and ground-based photometry, the High Accuracy Radial velocity Planet Searcher (HARPS) high-resolution spectroscopy, and Gemini speckle imaging. We characterize the host star and determine T_eff, *_= 4734 ±67 K, R_*=0.726±0.007 R_☉, and M_*=0.748±0.032 M_☉. We present a novel detrending method based on point spread function shape-change modelling and demonstrate its suitability to correct flux variations in CHEOPS data. We confirm the planetary nature of both bodies and find that TOI-1064 b has an orbital period of P_b = 6.44387 ± 0.00003 d, a radius of R_b = 2.59 ± 0.04 R_⊕, and a mass of M_ b_ = 13.5_–1.8^+1.7 M_⊕, whilst TOI-1064 c has an orbital period of P_ c_ = 12.22657^+0.00005_–0.00004 d, a radius of R_c = 2.65 ± 0.04 R_⊕, and a 3σ upper mass limit of 8.5 M_⊕. From the high-precision photometry we obtain radius uncertainties of ∼1.6 per cent, allowing us to conduct internal structure and atmospheric escape modelling. TOI-1064 b is one of the densest, well-characterized sub-Neptunes, with a tenuous atmosphere that can be explained by the loss of a primordial envelope following migration through the protoplanetary disc. It is likely that TOI-1064 c has an extended atmosphere due to the tentative low density, however further radial velocities are needed to confirm this scenario and the similar radii, different masses nature of this system. The high-precision data and modelling of TOI-1064 b are important for planets in this region of mass-radius space, and it allow us to identify a trend in bulk density-stellar metallicity for massive sub-Neptunes that may hint at the formation of this population of planets.

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: composition - planets and satellites: detection - planets and satellites: interiors - stars: individual: (TOI-1064 (TIC 79748331, Gaia EDR3 6683371847364921088))

VizieR on-line data: <Available at CDS (J/MNRAS/511/1043): cheo*.dat traw*.dat tdet*.dat harps*.dat ctio*.dat saao*.dat ngts*.dat astep*.dat asassn.dat wasp.dat gems*.dat>

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

Simbad objects: 32

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