2011ApJ...742..116B

Query : 2011ApJ...742..116B

2011ApJ...742..116B - Astrophys. J., 742, 116 (2011/December-1)

HAT-P-20b-HAT-P-23b: four massive transiting extrasolar planets.

BAKOS G.A., HARTMAN J., TORRES G., LATHAM D.W., KOVACS G., NOYES R.W., FISCHER D.A., JOHNSON J.A., MARCY G.W., HOWARD A.W., KIPPING D., ESQUERDO G.A., SHPORER A., BEKY B., BUCHHAVE L.A., PERUMPILLY G., EVERETT M., SASSELOV D.D., STEFANIK R.P., LAZAR J., PAPP I. and SARI P.

Abstract (from CDS):

We report the discovery of four relatively massive (2-7 MJ) transiting extrasolar planets. HAT-P-20b orbits the moderately bright V = 11.339 K3 dwarf star GSC 1910-00239 on a circular orbit, with a period P = 2.875317 ±0.000004 days, transit epoch Tc= 2455080.92661±0.00021 (BJDUTC), and transit duration 0.0770±0.0008 days. The host star has a mass of 0.76 ±0.03 M☉, radius of 0.69±0.02 R☉, effective temperature 4595±80 K, and metallicity [Fe/H] = +0.35±0.08. The planetary companion has a mass of 7.246±0.187 MJ and a radius of 0.867±0.033 RJyielding a mean density of 13.78±1.50 g/cm3. HAT-P-21b orbits the V = 11.685 G3 dwarf star GSC 3013-01229 on an eccentric (e = 0.228±0.016) orbit, with a period P = 4.124481±0.000007 days, transit epoch Tc= 2454996.41312 ±0.00069, and transit duration 0.1530±0.0027 days. The host star has a mass of 0.95±0.04 M☉, radius of 1.10±0.08 R☉, effective temperature 5588±80 K, and metallicity [Fe/H] = +0.01±0.08. The planetary companion has a mass of 4.063±0.161 MJ and a radius of 1.024±0.092 R J yielding a mean density of 4.68+1.59_- 0.99_g/cm3. HAT-P-21b is a borderline object between the pM and pL class planets, and the transits occur near apastron. HAT-P-22b orbits the bright V = 9.732 G5 dwarf star HD 233731 on a circular orbit, with a period P = 3.212220±0.000009 days, transit epoch Tc= 2454930.22001±0.00025, and transit duration 0.1196 ±0.0014 days. The host star has a mass of 0.92±0.03 M☉, radius of 1.04±0.04 R☉, effective temperature 5302±80 K, and metallicity [Fe/H] = +0.24±0.08. The planet has a mass of 2.147±0.061 MJ and a compact radius of 1.080±0.058 RJ yielding a mean density of 2.11+0.40 _- 0.29_ g/cm3. The host star also harbors an M-dwarf companion at a wide separation. Finally, HAT-P-23b orbits the V = 12.432 G0 dwarf star GSC 1632-01396 on a close to circular orbit, with a period P = 1.212884±0.000002 days, transit epoch Tc= 2454852.26464±0.00018, and transit duration 0.0908 ±0.0007 days. The host star has a mass of 1.13±0.04 M☉, radius of 1.20±0.07 R☉, effective temperature 5905±80 K, and metallicity [Fe/H] = +0.15±0.04. The planetary companion has a mass of 2.090±0.111 M J and a radius of 1.368±0.090 RJyielding a mean density of 1.01 ± 0.18 g/cm3. HAT-P-23b is an inflated and massive hot Jupiter on a very short period orbit, and has one of the shortest characteristic infall times (7.5+2.9_- 1.8_Myr) before it gets engulfed by the star.

Abstract Copyright: ∼

Journal keyword(s): stars: individual (HAT-P-20, HAT-P-21, HAT-P-22, HAT-P-23) - techniques: photometric - techniques: spectroscopic

VizieR on-line data: <Available at CDS (J/ApJ/742/116): table8.dat table9.dat table10.dat table11.dat>

Simbad objects: 26

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Number of rows : 26
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 WASP-32b Pl 00 15 50.8077262344 +01 12 01.588900896           ~ 43 1
2 HAT-P-16b Pl 00 38 17.5584024024 +42 27 47.216738232           ~ 60 1
3 HD 17156b Pl 02 49 44.4871034544 +71 45 11.629235988           ~ 184 1
4 HAT-P-15b Pl 04 24 59.5350210144 +39 27 38.312978976           ~ 54 1
5 CoRoT-7b Pl 06 43 49.4690164104 -01 03 46.826642700           ~ 402 1
6 UCAC3 229-88754 PM* 07 27 39.6209185689 +24 20 16.903143188   12.58 11.35 13.42   ~ 3 0
7 HAT-P-20b Pl 07 27 39.9488720808 +24 20 11.516231112           ~ 82 1
8 HAT-P-20 PM* 07 27 39.9488720808 +24 20 11.516231112   12.58 11.35 11.00   K3V 73 1
9 HD 80606b Pl 09 22 37.5768032712 +50 36 13.435326684           ~ 327 1
10 HD 233731 PM* 10 22 43.5923328528 +50 07 42.062425248   10.62 9.76 9.44   G5 50 1
11 HD 233731b Pl 10 22 43.5923328528 +50 07 42.062425248           ~ 47 1
12 2MASS J10224397+5007504 PM* 10 22 43.9707564192 +50 07 50.443119624           ~ 2 0
13 HAT-P-21 * 11 25 05.9859193536 +41 01 40.664937216   12.56 11.46 11.71   G3 35 1
14 HAT-P-21b Pl 11 25 05.9859193536 +41 01 40.664937216           ~ 38 1
15 BD+22 2716b Pl 14 33 06.3571702344 +21 53 40.981395876           ~ 160 1
16 HD 147506 * 16 20 36.3576063720 +41 02 53.106772488   9.15 8.69     F8V 174 2
17 BD+38 2917b Pl 17 20 27.8781604680 +38 14 31.908984936           ~ 82 1
18 TrES-3 Pl 17 52 07.0184259768 +37 32 46.237377840           ~ 230 2
19 NAME OGLE-TR-56b Pl 17 56 35.5016678064 -29 32 21.479240220           ~ 201 1
20 CoRoT-3b Pl 19 28 13.2642131544 +00 07 18.613986132           ~ 137 1
21 BD+47 2846b Pl 19 28 59.3538826128 +47 58 10.217007804           ~ 377 1
22 HAT-P-23b Pl 20 24 29.7234392904 +16 45 43.811510112           ~ 71 1
23 HAT-P-23 * 20 24 29.7234392904 +16 45 43.811510112   13.05 11.94 12.27   G0 67 1
24 WASP-46b Pl 21 14 56.8598669520 -55 52 18.458085144           ~ 49 1
25 WASP-10b Pl 23 15 58.3006181424 +31 27 46.296056268           ~ 111 1
26 CD-35 16019b Pl 23 59 36.0711872328 -35 01 52.923618408           ~ 129 0

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