2019AJ....158...78J

Query : 2019AJ....158...78J

2019AJ....158...78J - Astron. J., 158, 78-78 (2019/August-0)

KELT-23Ab: a hot Jupiter transiting a near-solar twin close to the TESS and JWST continuous viewing zones.

JOHNS D., REED P.A., RODRIGUEZ J.E., PEPPER J., STASSUN K.G., PENEV K., GAUDI B.S., LABADIE-BARTZ J., FULTON B.J., QUINN S.N., EASTMAN J.D., CIARDI D.R., HIRSCH L., STEVENS D.J., STEVENS C.P., OBERST T.E., COHEN D.H., JENSEN E.L.N., BENNI P., VILLANUEVA S., MURAWSKI G., BIERYLA A., LATHAM D.W., VANAVERBEKE S., DUBOIS F., RAU S., LOGIE L., RAUENZAHN R.F., WITTENMYER R.A., ZAMBELLI R., BAYLISS D., BEATTY T.G., COLLINS K.A., COLON K.D., CURTIS I.A., EVANS P., GREGORIO J., JAMES D., DEPOY D.L., JOHNSON M.C., JONER M.D., KASPER D.H., KHAKPASH S., KIELKOPF J.F., KUHN R.B., LUND M.B., MANNER M., MARSHALL J.L., McLEOD K.K., PENNY M.T., RELLES H., SIVERD R.J., STEPHENS D.C., STOCKDALE C., TAN T.-G., TRUEBLOOD M., TRUEBLOOD P. and YAO X.

Abstract (from CDS):

We announce the discovery of KELT-23Ab, a hot Jupiter transiting the relatively bright (V = 10.3) star BD+66 911 (TYC 4187-996-1), and characterize the system using follow-up photometry and spectroscopy. A global fit to the system yields host-star properties of Teff=5900±49 K, M*=0.945–0.054+0.060M☉, R*=0.995±0.015R☉, L*=1.082–0.048+0.051L☉, logg*=4.418–0.025+0.026 (cgs), and [Fe/H]=-0.105±0.077. KELT-23Ab is a hot Jupiter with a mass of MP=0.938–0.042+0.045MJ, radius of RP=1.322±0.025RJ, and density of ρP=0.504–0.035+0.038 g cm–3. Intense insolation flux from the star has likely caused KELT-23Ab to become inflated. The time of inferior conjunction is T0=2458149.40776±0.00091BJDTDB and the orbital period is P=2.255353–0.000030+0.000031 days. There is strong evidence that KELT-23A is a member of a long-period binary star system with a less luminous companion, and due to tidal interactions, the planet is likely to spiral into its host within roughly a gigayear. This system has one of the highest positive ecliptic latitudes of all transiting planet hosts known to date, placing it near the Transiting Planet Survey Satellite and James Webb Space Telescope continuous viewing zones. Thus we expect it to be an excellent candidate for long-term monitoring and follow up with these facilities.

Abstract Copyright: © 2019. The American Astronomical Society. All rights reserved.

Journal keyword(s): methods: observational - planets and satellites: detection - planets and satellites: gaseous planets - techniques: photometric - techniques: radial velocities - techniques: spectroscopic

Simbad objects: 13

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Number of rows : 13
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 10069b Pl 01 37 25.0332798696 -45 40 40.374717456           ~ 369 1
2 CD-42 3043 EB* 07 13 12.3537608448 -42 24 35.116644168   11.78 11.00     G4 29 0
3 CD-42 3043b Pl 07 13 12.3537608448 -42 24 35.116644168           ~ 30 0
4 BD+60 1538 * 14 26 05.7571276200 +59 26 39.289731216   10.62 10.16     F5 17 0
5 BD+66 911b Pl 15 28 35.1921215592 +66 21 31.543424640           ~ 8 0
6 BD+66 911 EB* 15 28 35.1921215592 +66 21 31.543424640   10.90 10.31 10.24   K 12 0
7 BD+66 911B * 15 28 35.7870738744 +66 21 28.760695884           ~ 3 0
8 Qatar 1b Pl 20 13 31.6172746704 +65 09 43.492226796           ~ 79 1
9 HD 332124 EB* 20 19 12.0048114552 +32 34 51.767012820   10.76 10.48     A8V 16 0
10 HD 332124b Pl 20 19 12.0048114552 +32 34 51.767012820           ~ 18 0
11 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 1860 1
12 WASP-47b Pl 22 04 48.7261549272 -12 01 07.998743676           ~ 94 1
13 NAME CD-35 15858Ab Pl 23 36 40.3766548488 -34 36 40.560299748           ~ 14 0

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