2019A&A...623A.165E

Query : 2019A&A...623A.165E

2019A&A...623A.165E - Astronomy and Astrophysics, volume 623A, 165-165 (2019/3-1)

HD 219666 b: a hot-Neptune from TESS Sector 1.

ESPOSITO M., ARMSTRONG D.J., GANDOLFI D., ADIBEKYAN V., FRIDLUND M., SANTOS N.C., LIVINGSTON J.H., DELGADO MENA E., FOSSATI L., LILLO-BOX J., BARRAGAN O., BARRADO D., CUBILLOS P.E., COOKE B., JUSTESEN A.B., MERU F., DIAZ R.F., DAI F., NIELSEN L.D., PERSSON C.M., WHEATLEY P.J., HATZES A.P., VAN EYLEN V., MUSSO M.M., ALONSO R., BECK P.G., BARROS S.C.C., BAYLISS D., BONOMO A.S., BOUCHY F., BROWN D.J.A., BRYANT E., CABRERA J., COCHRAN W.D., CSIZMADIA S., DEEG H., DEMANGEON O., DELEUIL M., DUMUSQUE X., EIGMULLER P., ENDL M., ERIKSON A., FAEDI F., FIGUEIRA P., FUKUI A., GRZIWA S., GUENTHER E.W., HIDALGO D., HJORTH M., HIRANO T., HOJJATPANAH S., KNUDSTRUP E., KORTH J., LAM K.W.F., DE LEON J., LUND M.N., LUQUE R., MATHUR S., MONTANES RODRIGUEZ P., NARITA N., NESPRAL D., NIRAULA P., NOWAK G., OSBORN H.P., PALLE E., PATZOLD M., POLLACCO D., PRIETO-ARRANZ J., RAUER H., REDFIELD S., RIBAS I., SOUSA S.G., SMITH A.M.S., TALA-PINTO M., UDRY S. and WINN J.N.

Abstract (from CDS):

We report on the confirmation and mass determination of a transiting planet orbiting the old and inactive G7 dwarf star HD 219666 (M*=0.92±0.03M☉, R*=1.03±0.03R☉, τ*=10±2Gyr). With a mass of Mb=16.6±1.3M⊕, a radius of Rb=4.71±0.17R⊕, and an orbital period of Porb~= 6-days, HD 219666 b is a new member of a rare class of exoplanets: the hot-Neptunes. The Transiting Exoplanet Survey Satellite (TESS) observed HD 219666 (also known as TOI-118) in its Sector 1 and the light curve shows four transit-like events, equally spaced in time. We confirmed the planetary nature of the candidate by gathering precise radial-velocity measurements with the High Accuracy Radial velocity Planet Searcher (HARPS) at ESO 3.6 m. We used the co-added HARPS spectrum to derive the host star fundamental parameters (Teff=5527±65K, logg*=4.40±0.11(cgs), [Fe/H]=0.04±0.04dex, log R'HK=-5.07±0.03), as well as the abundances of many volatile and refractory elements. The host star brightness (V=9.9) makes it suitable for further characterisation by means of in-transit spectroscopy. The determination of the planet orbital obliquity, along with the atmosphericmetal-to-hydrogen content and thermal structure could provide us with important clues on the formation mechanisms of this class of objects.

Abstract Copyright: © ESO 2019

Journal keyword(s): planets and satellites: detection - planets and satellites: fundamental parameters - techniques: radial velocities - stars: fundamental parameters - techniques: photometric - planets and satellites: individual: HD 219666 b

CDS comments: Fig.6 NGTS-4b non identified.

Simbad objects: 19

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Number of rows : 19
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 HD 1397b Pl 00 17 47.1523790112 -66 21 32.062984452           ~ 18 0
2 HD 2685b Pl 00 29 18.9525583296 -76 18 14.621613984           ~ 17 0
3 * pi. Men c Pl 05 37 09.8868446714 -80 28 08.834553264           ~ 94 0
4 NAME LP 424-4b Pl 07 59 05.8395356736 +15 23 29.236065000           ~ 302 1
5 Ross 905b Pl 11 42 11.0933350978 +26 42 23.650782778           ~ 811 1
6 K2-110b Pl 13 49 23.8898803200 -12 17 04.123044132           ~ 29 0
7 CD-24 12581c Pl 16 10 17.6976776832 -24 59 25.260709632           ~ 27 0
8 K2-32b Pl 16 49 42.2601799152 -19 32 34.151379684           ~ 30 0
9 Kepler-20c Pl 19 10 47.5233433920 +42 20 19.301370684           ~ 97 1
10 BD+47 2936b Pl 19 50 50.2472976936 +48 04 51.101390496           ~ 416 1
11 Kepler-18c Pl 19 52 19.0688312520 +44 44 46.807928916           ~ 76 1
12 Kepler-48c Pl 19 56 33.4161659688 +40 56 56.496876216           ~ 66 1
13 WASP-47d Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 49 0
14 K2-66b Pl 22 06 06.4020754080 -10 42 41.421424716           ~ 17 0
15 L 119-213 Er* 22 41 58.1171811377 -69 10 08.320741850   17.3       ~ 53 0
16 K2-285 * 23 17 32.2274265744 +01 18 01.074749508   12.87 11.75 11.88   G9 10 0
17 K2-285c Pl 23 17 32.2274265744 +01 18 01.074749508           ~ 12 0
18 HD 219666b Pl 23 18 13.6298981445 -56 54 14.035920520           ~ 22 0
19 HD 219666 PM* 23 18 13.6298981445 -56 54 14.035920520   10.60 9.81     G5V 19 0

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