2016MNRAS.457.4205S

Query : 2016MNRAS.457.4205S

2016MNRAS.457.4205S - Mon. Not. R. Astron. Soc., 457, 4205-4217 (2016/April-3)

High-precision photometry by telescope defocussing - VIII. WASP-22, WASP-41, WASP-42 and WASP-55.

SOUTHWORTH J., TREGLOAN-REED J., ANDERSEN M.I., CALCHI NOVATI S., CICERI S., COLQUE J.P., D'AGO G., DOMINIK M., EVANS D.F., GU S.-H., HERRERA-CORDOVA A., HINSE T.C., JORGENSEN U.G., JUNCHER D., KUFFMEIER M., MANCINI L., PEIXINHO N., POPOVAS A., RABUS M., SKOTTFELT J., TRONSGAARD R., UNDA-SANZANA E., WANG X.-B., WERTZ O., ALSUBAI K.A., ANDERSEN J.M., BOZZA V., BRAMICH D.M., BURGDORF M., DAMERDJI Y., DIEHL C., ELYIV A., FIGUERA JAIMES R., HAUGBOLLE T., HUNDERTMARK M., KAINS N., KERINS E., KORHONEN H., LIEBIG C., MATHIASEN M., PENNY M.T., RAHVAR S., SCARPETTA G., SCHMIDT R.W., SNODGRASS C., STARKEY D., SURDEJ J., VILELA C., VON ESSEN C. and WANG Y.

Abstract (from CDS):

We present 13 high-precision and four additional light curves of four bright southern-hemisphere transiting planetary systems: WASP-22, WASP-41, WASP-42 and WASP-55. In the cases of WASP-42 and WASP-55, these are the first follow-up observations since their discovery papers. We present refined measurements of the physical properties and orbital ephemerides of all four systems. No indications of transit timing variations were seen. All four planets have radii inflated above those expected from theoretical models of gas-giant planets; WASP-55 b is the most discrepant with a mass of 0.63 MJup and a radius of 1.34 RJup. WASP-41 shows brightness anomalies during transit due to the planet occulting spots on the stellar surface. Two anomalies observed 3.1 d apart are very likely due to the same spot. We measure its change in position and determine a rotation period for the host star of 18.6±1.5 d, in good agreement with a published measurement from spot-induced brightness modulation, and a sky-projected orbital obliquity of λ=6±11°. We conclude with a compilation of obliquity measurements from spot-tracking analyses and a discussion of this technique in the study of the orbital configurations of hot Jupiters.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): stars: fundamental parameters - stars: individual: (WASP-22, WASP-41, WASP-42, WASP-55) - planetary systems

VizieR on-line data: <Available at CDS (J/MNRAS/457/4205): wasp22.dat wasp41.dat wasp42.dat wasp55.dat>

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 WASP-22 * 03 31 16.3267124400 -23 49 10.840600632   12.38 11.99 11.41   G 78 1
2 WASP-22b Pl 03 31 16.3267124400 -23 49 10.840600632           ~ 51 1
3 WASP-19 * 09 53 40.0765648584 -45 39 33.057187596   13.05 12.31 12.12 11.35 G8V 207 2
4 HATS-2 * 11 46 57.3702458424 -22 33 46.817348148   14.53 13.62 13.40   ~ 50 1
5 CD-29 9873b Pl 12 42 28.4949559632 -30 38 23.529045948           ~ 44 1
6 CD-29 9873 * 12 42 28.4949559632 -30 38 23.529045948   12.36 11.63 11.39 10.78 G8V 76 1
7 WASP-42b Pl 12 51 55.5581398320 -42 04 25.096306584           ~ 33 1
8 WASP-42 PM* 12 51 55.5581398320 -42 04 25.096306584           ~ 39 1
9 WASP-55b Pl 13 35 01.9537865424 -17 30 12.527623872           ~ 35 1
10 WASP-55 * 13 35 01.9537865424 -17 30 12.527623872   12.69 11.75     G1 74 1
11 Qatar 2 PM* 13 50 37.4100326640 -06 48 14.421574044   14.0   13.45   K5V 72 1
12 Kepler-30 Er* 19 01 08.0746104528 +38 56 50.218268856   16.50   15.767 14.55 ~ 180 1
13 Kepler-63 Er* 19 16 54.2861367672 +49 32 53.451062520   12.449 11.733 11.701   G2V 145 1
14 BD+47 2936 EB* 19 50 50.2472976936 +48 04 51.101390496       8.8   K4V 359 1
15 Kepler-17 Ro* 19 53 34.8643397568 +47 48 54.049530564   14.6   13.6   G5V 175 1
16 WASP-6 * 23 12 37.7368282608 -22 40 26.273805024   12.90 11.91     G8V 112 1
17 WASP-4 PM* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 196 1

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