2017AJ....153..215P

Query : 2017AJ....153..215P

2017AJ....153..215P - Astron. J., 153, 215-215 (2017/May-0)

KELT-11b: A highly inflated sub-Saturn exoplanet transiting the V = 8 subgiant HD 93396.

PEPPER J., RODRIGUEZ J.E., COLLINS K.A., JOHNSON J.A., FULTON B.J., HOWARD A.W., BEATTY T.G., STASSUN K.G., ISAACSON H., COLON K.D., LUND M.B., KUHN R.B., SIVERD R.J., GAUDI B.S., TAN T.G., CURTIS I., STOCKDALE C., MAWET D., BOTTOM M., JAMES D., ZHOU G., BAYLISS D., CARGILE P., BIERYLA A., PENEV K., LATHAM D.W., LABADIE-BARTZ J., KIELKOPF J., EASTMAN J.D., OBERST T.E., JENSEN E.L.N., NELSON P., SLISKI D.H., WITTENMYER R.A., McCRADY N., WRIGHT J.T., RELLES H.M., STEVENS D.J., JONER M.D. and HINTZ E.

Abstract (from CDS):

We report the discovery of a transiting exoplanet, KELT-11b, orbiting the bright (V = 8.0) subgiant HD 93396. A global analysis of the system shows that the host star is an evolved subgiant star with Teff=5370±51 K, M*=1.438–0.052+0.061M☉, R*=2.72–0.17+0.21R☉, logg* = 3.727–0.046+0.040, and [Fe/H]=0.180±0.075. The planet is a low-mass gas giant in a P = 4.736529 ± 0.00006 day orbit, with MP = 0.195 ± 0.018 MJ, RP=1.37–0.12+0.15RJ, ρP=0.093–0.024+0.028 g cm–3, surface gravity loggP=2.407–0.086+0.080, and equilibrium temperature Teq=1712–46+51 K. KELT-11 is the brightest known transiting exoplanet host in the southern hemisphere by more than a magnitude and is the sixth brightest transit host to date. The planet is one of the most inflated planets known, with an exceptionally large atmospheric scale height (2763 km), and an associated size of the expected atmospheric transmission signal of 5.6%. These attributes make the KELT-11 system a valuable target for follow-up and atmospheric characterization, and it promises to become one of the benchmark systems for the study of inflated exoplanets.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): planetary systems - planets and satellites: detection - stars: individual: KELT-11 - techniques: photometric - techniques: radial velocities - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/AJ/153/215): star.dat table3.dat figure2.dat table6.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 CD-42 3043b Pl 07 13 12.3537608448 -42 24 35.116644168           ~ 30 0
2 CD-51 2720b Pl 07 49 39.6017531808 -52 07 13.575288000           ~ 19 0
3 HD 93396b Pl 10 46 49.7401839144 -09 23 56.495447700           ~ 54 0
4 HD 93396 EB* 10 46 49.7401839144 -09 23 56.495447700   8.87 8.04     G8/K0IV 51 0
5 BD+31 2447b Pl 13 03 55.6466582304 +30 38 24.278530344           ~ 43 1
6 NAME OGLE-TR-56b Pl 17 56 35.5016678064 -29 32 21.479240220           ~ 201 1
7 KELT-10b Pl 18 58 11.6095434192 -47 00 11.664277488           ~ 12 0
8 Kepler-12b Pl 19 04 58.4220633696 +50 02 25.271762064           ~ 89 1
9 BD+47 2936b Pl 19 50 50.2472976936 +48 04 51.101390496           ~ 416 1
10 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1437 1
11 NAME CD-34 14724Ab Pl 20 55 07.9443524136 -34 08 08.007489384           ~ 39 0
12 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 1860 1
13 BD-09 6003b Pl 22 33 28.4132310576 -09 01 21.975635100           ~ 22 0

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