2011ApJS..197....7C

Query : 2011ApJS..197....7C

2011ApJS..197....7C - Astrophys. J., Suppl. Ser., 197, 7 (2011/November-0)

Kepler-18b, c, and d: a system of three planets confirmed by transit timing variations, light curve validation, Warm-Spitzer photometry, and radial velocity measurements.

COCHRAN W.D., FABRYCKY D.C., TORRES G., FRESSIN F., DESERT J.-M., RAGOZZINE D., SASSELOV D., FORTNEY J.J., ROWE J.F., BRUGAMYER E.J., BRYSON S.T., CARTER J.A., CIARDI D.R., HOWELL S.B., STEFFEN J.H., BORUCKI W.J., KOCH D.G., WINN J.N., WELSH W.F., UDDIN K., TENENBAUM P., STILL M., SEAGER S., QUINN S.N., MULLALLY F., MILLER N., MARCY G.W., MacQUEEN P.J., LUCAS P., LISSAUER J.J., LATHAM D.W., KNUTSON H., KINEMUCHI K., JOHNSON J.A., JENKINS J.M., ISAACSON H., HOWARD A., HORCH E., HOLMAN M.J., HENZE C.E., HAAS M.R., GILLILAND R.L., GAUTIER III T.N., FORD E.B., FISCHER D.A., EVERETT M., ENDL M., DEMORY B.-O., DEMING D., CHARBONNEAU D., CALDWELL D., BUCHHAVE L., BROWN T.M. and BATALHA N.

Abstract (from CDS):

We report the detection of three transiting planets around a Sun-like star, which we designate Kepler-18. The transit signals were detected in photometric data from the Kepler satellite, and were confirmed to arise from planets using a combination of large transit-timing variations (TTVs), radial velocity variations, Warm-Spitzer observations, and statistical analysis of false-positive probabilities. The Kepler-18 star has a mass of 0.97 M {x2609}, a radius of 1.1 R{x2609}, an effective temperature of 5345 K, and an iron abundance of [Fe/H] = +0.19. The planets have orbital periods of approximately 3.5, 7.6, and 14.9 days. The innermost planet "b" is a "super-Earth" with a mass of 6.9±3.4 M⊕, a radius of 2.00±0.10 R⊕, and a mean density of 4.9±2.4 g cm3. The two outer planets "c" and "d" are both low-density Neptune-mass planets. Kepler-18c has a mass of 17.3 ±1.9 M⊕, a radius of 5.49±0.26 R⊕, and a mean density of 0.59±0.07 g cm3, while Kepler-18d has a mass of 16.4±1.4 M⊕, a radius of 6.98±0.33 R⊕ and a mean density of 0.27±0.03 g cm3. Kepler-18c and Kepler-18d have orbital periods near a 2:1 mean-motion resonance, leading to large and readily detected TTVs.

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Journal keyword(s): planetary systems - stars: individual (Kepler-18, KIC 8644288, 2MASS J19521906+4444467) - techniques: photometric - techniques: spectroscopic

Simbad objects: 27

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Number of rows : 27
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 CoRoT-7b Pl 06 43 49.4690164104 -01 03 46.826642700           ~ 402 1
2 * rho01 Cnc e Pl 08 52 35.8111044043 +28 19 50.954994470           ~ 576 1
3 HAT-P-26b Pl 14 12 37.5331103311 +04 03 36.116569918           ~ 162 1
4 NAME G 139-21b Pl 17 15 18.9339850845 +04 57 50.066612336           ~ 722 1
5 Kepler-8 Ro* 18 45 09.1489991376 +42 27 03.891327156           F6V 107 1
6 Kepler-9 Er* 19 02 17.7544327200 +38 24 03.176851896     13.9 13.791   G2 190 1
7 Kepler-9b Pl 19 02 17.7544327200 +38 24 03.176851896           ~ 106 1
8 Kepler-9c Pl 19 02 17.7544327200 +38 24 03.176851896           ~ 99 1
9 Kepler-4 Er* 19 02 27.6979514832 +50 08 08.703945600   13.114 12.293 12.195   G0 104 1
10 Kepler-10 Ro* 19 02 43.0613892904 +50 14 28.701617339       11.00   G2V 202 1
11 Kepler-10b Pl 19 02 43.0613892904 +50 14 28.701617339           ~ 297 1
12 Kepler-10c Pl 19 02 43.0613892904 +50 14 28.701617339           ~ 120 1
13 Kepler-7 Er* 19 14 19.5623105760 +41 05 23.367379128           G0 112 1
14 Kepler-6 Ro* 19 47 20.9379557640 +48 14 23.759029608           ~ 97 1
15 Kepler-11b Pl 19 48 27.6226218768 +41 54 32.903163504           ~ 149 1
16 Kepler-11c Pl 19 48 27.6226218768 +41 54 32.903163504           ~ 110 1
17 Kepler-11 Er* 19 48 27.6226218768 +41 54 32.903163504   14.635 13.838 13.742   G2V 351 1
18 Kepler-11e Pl 19 48 27.6226218768 +41 54 32.903163504           ~ 123 1
19 Kepler-11f Pl 19 48 27.6226218768 +41 54 32.903163504           ~ 129 1
20 Kepler-11d Pl 19 48 27.6226218768 +41 54 32.903163504           ~ 119 1
21 Kepler-18b Pl 19 52 19.0688312520 +44 44 46.807928916           ~ 77 1
22 Kepler-18d Pl 19 52 19.0688312520 +44 44 46.807928916           ~ 82 1
23 Kepler-18c Pl 19 52 19.0688312520 +44 44 46.807928916           ~ 76 1
24 Kepler-18 Er* 19 52 19.0688312520 +44 44 46.807928916   14.750 13.767 13.93   ~ 124 1
25 Kepler-5 Ro* 19 57 37.6884643560 +44 02 06.189718884           F5V 102 1
26 NAME Cyg Complex reg 20 32 +45.0           ~ 601 0
27 NAME Lyra reg ~ ~           ~ 56 0

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