2014A&A...568A.127M


Query : 2014A&A...568A.127M

2014A&A...568A.127M - Astronomy and Astrophysics, volume 568A, 127-127 (2014/8-1)

Physical properties of the WASP-67 planetary system from multi-colour photometry.

MANCINI L., SOUTHWORTH J., CICERI S., CALCHI NOVATI S., DOMINIK M., HENNING Th., JORGENSEN U.G., KORHONEN H., NIKOLOV N., ALSUBAI K.A., BOZZA V., BRAMICH D.M., D'AGO G., FIGUERA JAIMES R., GALIANNI P., GU S.-H., HARPSOE K., HINSE T.C., HUNDERTMARK M., JUNCHER D., KAINS N., POPOVAS A., RABUS M., RAHVAR S., SKOTTFELT J., SNODGRASS C., STREET R., SURDEJ J., TSAPRAS Y., VILELA C., WANG X.-B. and WERTZ O.

Abstract (from CDS):

The extrasolar planet WASP-67 b is the first hot Jupiter definitively known to undergo only partial eclipses. The lack of the second and third contact points in this planetary system makes it difficult to obtain accurate measurements of its physical parameters. By using new high-precision photometric data, we confirm that WASP-67 b shows grazing eclipses and compute accurate estimates of the physical properties of the planet and its parent star. We present high-quality, multi-colour, broad-band photometric observations comprising five light curves covering two transit events, obtained using two medium-class telescopes and the telescope-defocusing technique. One transit was observed through a Bessel-R filter and the other simultaneously through filters similar to Sloan g'r'i'z'. We modelled these data using JKTEBOP. The physical parameters of the system were obtained from the analysis of these light curves and from published spectroscopic measurements. All five of our light curves satisfy the criterion for being grazing eclipses. We revise the physical parameters of the whole WASP-67 system and, in particular, significantly improve the measurements of the planet's radius (Rb=1.091±0.046RJup) and density (ρb=0.292 ±0.036ρJup), as compared to the values in the discovery paper (Rb=1.4–0.2+0.3RJup and ρb=0.16 ±0.08ρJup). The transit ephemeris was also substantially refined. We investigated the variation of the planet's radius as a function of the wavelength, using the simultaneous multi-band data, finding that our measurements are consistent with a flat spectrum to within the experimental uncertainties.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: fundamental parameters - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/568/A127): mpg2_2mg.dat mpg2_2mr.dat mpg2_2mi.dat mpg2_2mz.dat dk1_54m.dat>

Simbad objects: 4

goto Full paper

goto View the references in ADS

Number of rows : 4
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-23 9677 EB* 11 01 35.8978277184 -23 51 38.386984896   11.05 10.28 10.21 9.66 ~ 61 1
2 HAT-P-27 * 14 51 04.1870399712 +05 56 50.548526376   13.18 12.19 11.98 11.23 G8 58 1
3 WASP-67b Pl 19 42 58.5218345280 -19 56 58.521259680           ~ 55 1
4 WASP-67 * 19 42 58.5218345280 -19 56 58.521259680   12.90 12.54     K0V 32 1

To bookmark this query, right click on this link: simbad:objects in 2014A&A...568A.127M and select 'bookmark this link' or equivalent in the popup menu