2023MNRAS.522..750D

Query : 2023MNRAS.522..750D

2023MNRAS.522..750D - Mon. Not. R. Astron. Soc., 522, 750-766 (2023/June-2)

A sub-Neptune transiting the young field star HD 18599 at 40 pc.

DE LEON J.P., LIVINGSTON J.H., JENKINS J.S., VINES J.I., WITTENMYER R.A., CLARK J.T., WINN J.I.M., ADDISON B., BALLARD S., BAYLISS D., BEICHMAN C., BENNEKE B., BERARDO D.A., BOWLER B.P., BROWN T., BRYANT E.M., CHRISTIANSEN J., CIARDI D., COLLINS K.A., COLLINS K.I., CROSSFIELD I., DEMING D., DRAGOMIR D., DRESSING C.D., FUKUI A., GAN T., GIACALONE S., GILL S., GORJIAN V., GONZALEZ ALVAREZ E., HESSE K., HORNER J., HOWELL S.B., JENKINS J.M., KANE S.R., KENDALL A., KIELKOPF J.F., KREIDBERG L., LATHAM D.W., LIU H., LUND M.B., MATSON R., MATTHEWS E., MENGEL M.W., MORALES F., MORI M., NARITA N., NISHIUMI T., OKUMURA J., PLAVCHAN P., QUINN S., RABUS M., RICKER G., RUDAT A., SCHLIEDER J., SCHWARZ R.P., SEAGER S., SHPORER A., SMITH A.M.S., STASSUN K., TAMURA M., TAN T.G., TINNEY C., VANDERSPEK R., WERNER M.W., WEST R.G., WRIGHT D., ZHANG H. and ZHOU G.

Abstract (from CDS):

Transiting exoplanets orbiting young nearby stars are ideal laboratories for testing theories of planet formation and evolution. However, to date only a handful of stars with age <1 Gyr have been found to host transiting exoplanets. Here we present the discovery and validation of a sub-Neptune around HD 18599 , a young (300 Myr), nearby (d = 40 pc) K star. We validate the transiting planet candidate as a bona fide planet using data from the TESS , Spitzer , and Gaia missions, ground-based photometry from IRSF , LCO , PEST , and NGTS , speckle imaging from Gemini, and spectroscopy from CHIRON , NRES , FEROS , and MINERVA-Australis . The planet has an orbital period of 4.13 d , and a radius of 2.7 R⊕ . The RV data yields a 3-σ mass upper limit of 30.5 M⊕ which is explained by either a massive companion or the large observed jitter typical for a young star. The brightness of the host star (V∼9 mag) makes it conducive to detailed characterization via Doppler mass measurement which will provide a rare view into the interior structure of young planets.

Abstract Copyright: © 2023 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): techniques: radial velocities - techniques: spectroscopic - planets and satellites: detection - stars: individual: TOI-179

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

CDS comments: DS Tau Ab is a misprint for DS Tuc Ab.

Simbad objects: 25

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Number of rows : 25
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 HD 18599 PM* 02 57 02.9515683384 -56 11 31.513386300   9.87 8.99     K2Vk: 64 0
2 HD 18599b Pl 02 57 02.9515683384 -56 11 31.513386300           ~ 14 0
3 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
4 V* V1298 Tau TT* 04 05 19.5909996648 +20 09 25.563233736   11.11 10.12 9.57   K1 194 0
5 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
6 K2-284b Pl 05 16 33.7635876744 +20 15 18.365704668           ~ 12 0
7 K2-100b Pl 08 38 24.3002838928 +20 06 21.828057218           ~ 83 0
8 NGC 2632 OpC 08 39 58.4 +19 36 33           ~ 1733 0
9 CPD-63 1435 * 10 28 08.9903170248 -64 30 18.936383436   11.12 10.64     ~ 54 0
10 TOI-1227 Y*? 12 27 04.3053248184 -72 27 06.492769776           M4.5V 40 0
11 HD 109833 PM* 12 39 06.4022980464 -74 34 26.368773204   9.94 9.31     G3V 43 0
12 HD 120411 * 13 50 06.2797027704 -40 50 08.881076364   10.45 9.80     G0V 78 0
13 K2-33b Pl 16 10 14.7377409264 -19 19 09.407629452           ~ 93 0
14 K2-33 Or* 16 10 14.7377409264 -19 19 09.407629452   17.353       dM3.0 107 0
15 NAME Upper Sco Association As* 16 12 -23.4           ~ 1586 1
16 Kepler-1627 Ro* 18 56 13.5978347112 +41 34 36.240123684           G2V 45 0
17 Kepler-1975 Ro* 19 06 59.6424598464 +45 09 31.388510592   15.703 14.215 14.293   ~ 24 0
18 Kepler-970 BY* 19 18 30.0563509272 +40 42 31.420919736           K5V 42 0
19 Kepler-1928 Ro* 19 21 45.7565541936 +38 31 24.824057232           ~ 52 0
20 Kepler-1974 Ro* 19 35 47.4282354192 +48 03 54.899409312           ~ 30 0
21 NGC 6811 OpC 19 37 21.8 +46 22 43   7.47 6.8     ~ 435 0
22 Kepler-1643 Ro* 20 01 43.4371739904 +44 45 03.623720616           ~ 34 0
23 HD 197481b Pl 20 45 09.5324974119 -31 20 27.237889841           ~ 158 0
24 HD 222259A RS* 23 39 39.4808078664 -69 11 44.707735104   9.161 8.226 9.28 7.352 G6V 190 0
25 HD 222259Ab Pl 23 39 39.4808078664 -69 11 44.707735104           ~ 73 0

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