2023A&A...675A.183C


Query : 2023A&A...675A.183C

2023A&A...675A.183C - Astronomy and Astrophysics, volume 675A, 183 (2023/7-1)

The planetary system around HD 190622 (TOI-1054) Measuring the gas content of low-mass planets orbiting F-stars.

CABRERA J., GANDOLFI D., SERRANO L.M., CSIZMADIA S., EGGER J.A., BAUMEISTER P., KRENN A., BENZ W., DELINE A., FLOREN H.-G., COLLIER CAMERON A., ADIBEKYAN V., ALIBERT Y., BELLOMO S.E., DELREZ L., FOSSATI L., FORTIER A., GRZIWA S., HOYER S., BONFANTI A., SALMON S., SOUSA S.G., WILSON T.G., ALARCON J., ALONSO R., ANGLADA ESCUDE G., BARCZY T., BARRAGAN O., BARRADO D., BARROS S.C.C., BAUMJOHANN W., BECK M., BECK T., BERNABO L.M., BILLOT N., BONFILS X., BORSATO L., BRANDEKER A., BROEG C., CARRION-GONZALEZ O., CHARNOZ S., CIARDI D.R., COCHRAN W.D., COLLINS K.A., COLLINS K.I., CONTI D.M., DAVIES M.B., DEEG H.J., DELEUIL M., DEMANGEON O.D.S., DEMORY B.-O., EHRENREICH D., ERIKSON A., ESPOSITO M., FRIDLUND M., GILLON M., GOFFO E., GUDEL M., GUENTHER E.W., HARRE J.-V., HENG K., HOOTON M.J., ISAAK K.G., JENKINS J.M., KISS L.L., KNUDSTRUP E., LAM K.W.F., LASKAR J., LECAVELIER DES ETANGS A., LENDL M., LOVIS C., LUQUE R., MAGRIN D., MAXTED P.F.L., MURESAN A., NASCIMBENI V., OLOFSSON G., OSBORN H.P., OSBORNE H.L.M., OTTENSAMER R., PAGANO I., PALLE E., PERSSON C.M., PETER G., PIOTTO G., POLLACCO D., QUELOZ D., RAGAZZONI R., RANDO N., RAUER H., REDFIELD S., RIBAS I., RICKER G.R., RODLER F., SANTOS N.C., SCANDARIATO G., SEAGER S., SEGRANSAN D., SIMON A.E., SMITH A.M.S., STELLER M., SZABO G.M., THOMAS N., TOSI N., TWICKEN J.D., UDRY S., VAN EYLEN V., VAN GROOTEL V., WALTON N.A. and WINN J.N.

Abstract (from CDS):

Context. Giant planets are known to dominate the long-term stability of planetary systems due to their prevailing gravitational interactions, but they are also thought to play an important role in planet formation. Observational constraints improve our understanding of planetary formation processes such as the delivery of volatile-rich planetesimals from beyond the ice line into the inner planetary system. Additional constraints may come from studies of the atmosphere, but almost all such studies of the atmosphere investigate the detection of certain species, and abundances are not routinely quantitatively measured.
Aims. Accurate measurements of planetary bulk parameters - that is, mass and density - provide constraints on the inner structure and chemical composition of transiting planets. This information provides insight into properties such as the amounts of volatile species, which in turn can be related to formation and evolution processes.
Methods. The Transiting Exoplanet Survey Satellite (TESS) reported a planetary candidate around HD 190622 (TOI-1054), which was subsequently validated and found to merit further characterization with photometric and spectroscopic facilities. The KESPRINT collaboration used data from the High Accuracy Radial Velocity Planet Searcher (HARPS) to independently confirm the planetary candidate, securing its mass, and revealing the presence of an outer giant planet in the system. The CHEOPS consortium invested telescope time in the transiting target in order to reduce the uncertainty on the radius, improving the characterization of the planet.
Results. We present the discovery and characterization of the planetary system around HD 190622 (TOI-1054). This system hosts one transiting planet, which is smaller than Neptune (3.087–0.053+0.058REarth, 7.7 ± 1.0 MEarth) but has a similar bulk density (1.43 ± 0.21 g cm–3) and an orbital period of 16 days; and a giant planet, not known to be transiting, with a minimum mass of 227.0 ± 6.7 MEarth in an orbit with a period of 315 days.
Conclusions. Our measurements constrain the structure and composition of the transiting planet. HD 190622b has singular properties among the known population of transiting planets, which we discuss in detail. Among the sub-Neptune-sized planets known today, this planet stands out because of its large gas content.

Abstract Copyright: © The Authors 2023

Journal keyword(s): planetary systems - planets and satellites: detection

VizieR on-line data: <Available at CDS (J/A+A/675/A183): photom.dat rv.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 * pi. Men PM* 05 37 09.8868446714 -80 28 08.834553264   6.25 5.67     G0V 323 1
2 BD+10 1799b Pl 08 26 27.8490900672 +10 04 49.334175156           ~ 19 0
3 HD 80653b Pl 09 21 21.4157920824 +14 22 04.546737696           ~ 13 0
4 HD 86226 PM* 09 56 29.8441909920 -24 05 57.799322988   8.563 7.93 7.71   G2V 78 1
5 HD 137496 PM* 15 26 58.0705591632 -16 30 31.676789772   10.633 9.996     G5/6V 12 0
6 BD+72 779 * 17 16 04.1608097832 +72 09 40.173642792   10.43 9.89     ~ 7 0
7 HD 164922 PM* 18 02 30.8623420470 +26 18 46.805024012   7.79   6.5   G9V 213 1
8 BD-11 4672 PM* 18 33 28.8321237884 -11 38 09.721098093   11.21 9.99 9.60 9.02 K7V 73 1
9 Kepler-1514 Ro* 19 30 30.5892070488 +37 51 36.487214028   12.48 11.77     F7V 45 0
10 Kepler-167 Er* 19 30 38.0261896920 +38 20 43.437246900   15.255 14.284 13.989   K3 73 0
11 Kepler-1705 Ro* 20 06 18.8492915448 +44 18 43.833260880           ~ 15 0
12 HD 191939 EB* 20 08 05.7551464176 +66 51 02.076637068       8.5   G0 29 0
13 HD 190622c Pl 20 08 27.3988132440 -54 19 02.756211096           ~ 1 0
14 HD 190622b Pl 20 08 27.3988132440 -54 19 02.756211096           ~ 2 0
15 HD 190622 * 20 08 27.3988132440 -54 19 02.756211096   9.46 8.93     G0V 16 0

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