2019AJ....158..197R

Query : 2019AJ....158..197R

2019AJ....158..197R - Astron. J., 158, 197-197 (2019/November-0)

KELT-24b: a 5MJ planet on a 5.6 day well-aligned orbit around the young V = 8.3 F-star HD 93148.

RODRIGUEZ J.E., EASTMAN J.D., ZHOU G., QUINN S.N., BEATTY T.G., PENEV K., JOHNSON M.C., CARGILE P.A., LATHAM D.W., BIERYLA A., COLLINS K.A., DRESSING C.D., CIARDI D.R., RELLES H.M., MURAWSKI G., NISHIUMI T., YONEHARA A., ISHIMARU R., YOSHIDA F., GREGORIO J., LUND M.B., STEVENS D.J., STASSUN K.G., GAUDI B.S., COLON K.D., PEPPER J., NARITA N., AWIPHAN S., CHUANRAKSASAT P., BENNI P., ZAMBELLI R., GARRISON L.H., WILSON M.L., CORNACHIONE M.A., WANG S.X., LABADIE-BARTZ J., RODRIGUEZ R., SIVERD R.J., YAO X., BAYLISS D., BERLIND P., CALKINS M.L., CHRISTIANSEN J.L., COHEN D.H., CONTI D.M., CURTIS I.A., DEPOY D.L., ESQUERDO G.A., EVANS P., FELIZ D., FULTON B.J., HOLOIEN T.W.-S., JAMES D.J., JAYASINGHE T., JANG-CONDELL H., JENSEN E.L.N., JOHNSON J.A., JONER M.D., KHAKPASH S., KIELKOPF J.F., KUHN R.B., MANNER M., MARSHALL J.L., McLEOD K.K., McCRADY N., OBERST T.E., OELKERS R.J., PENNY M.T., REED P.A., SLISKI D.H., SHAPPEE B.J., STEPHENS D.C., STOCKDALE C., TAN T.-G., TRUEBLOOD M., TRUEBLOOD P., VILLANUEVA S., WITTENMYER R.A. and WRIGHT J.T.

Abstract (from CDS):

We present the discovery of KELT-24 b, a massive hot Jupiter orbiting a bright (V = 8.3 mag, K = 7.2 mag) young F-star with a period of 5.6 days. The host star, KELT-24 (HD 93148), has a Teff = 6509–49+50 K, a mass of M* = 1.460–0.059+0.055M☉, a radius of R* = 1.506 ± 0.022 R☉, and an age of 0.78–0.42+0.61 Gyr. Its planetary companion (KELT-24 b) has a radius of RP = 1.272 ± 0.021 RJ and a mass of MP = 5.18–0.22+0.21MJ, and from Doppler tomographic observations, we find that the planet's orbit is well-aligned to its host star's projected spin axis (λ=2.6–3.6+5.1). The young age estimated for KELT-24 suggests that it only recently started to evolve from the zero-age main sequence. KELT-24 is the brightest star known to host a transiting giant planet with a period between 5 and 10 days. Although the circularization timescale is much longer than the age of the system, we do not detect a large eccentricity or significant misalignment that is expected from dynamical migration. The brightness of its host star and its moderate surface gravity make KELT-24b an intriguing target for detailed atmospheric characterization through spectroscopic emission measurements since it would bridge the current literature results that have primarily focused on lower mass hot Jupiters and a few brown dwarfs.

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

Journal keyword(s): Transit photometry - Exoplanet astronomy - Exoplanet detection methods - Radial velocity

VizieR on-line data: <Available at CDS (J/AJ/158/197): fig1.dat fig2.dat table3.dat>

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 KELT-1b Pl 00 01 26.9168207928 +39 23 01.784206464           ~ 121 0
2 HD 10069b Pl 01 37 25.0332798696 -45 40 40.374717456           ~ 369 1
3 HD 93148b Pl 10 47 38.3506325184 +71 39 21.152505888           ~ 16 0
4 HD 93148 PM* 10 47 38.3506325184 +71 39 21.152505888   8.82 8.33     F5 33 0
5 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 439 2
6 HD 114762C LM* 13 12 19.7410686234 +17 31 01.630334317           ~ 129 0
7 BD+22 2716b Pl 14 33 06.3571702344 +21 53 40.981395876           ~ 160 1
8 HD 147506b Pl 16 20 36.3576063720 +41 02 53.106772488           ~ 253 1
9 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 174 2
10 WASP-103b Pl 16 37 15.5765824488 +07 11 00.109678740           ~ 183 1
11 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14419 0
12 BD+46 2629A * 19 07 53.1397066992 +46 52 05.922122844           ~ 42 1
13 * 51 Peg b Pl 22 57 27.9804852576 +20 46 07.797040104           ~ 666 1

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