2015A&A...583A.138M


C.D.S. - SIMBAD4 rel 1.7 - 2020.08.11CEST22:27:00

2015A&A...583A.138M - Astronomy and Astrophysics, volume 583A, 138-138 (2015/11-1)

Broad-band spectrophotometry of the hot Jupiter HAT-P-12b from the near-UV to the near-IR.

MALLONN M., NASCIMBENI V., WEINGRILL J., VON ESSEN C., STRASSMEIER K.G., PIOTTO G., PAGANO I., SCANDARIATO G., CSIZMADIA Sz., HERRERO E., SADA P.V., DHILLON V.S., MARSH T.R., KUENSTLER A., BERNT I. and GRANZER T.

Abstract (from CDS):

The detection of trends or gradients in the transmission spectrum of extrasolar planets is possible with observations at very low spectral resolution. Transit measurements of sufficient accuracy using selected broad-band filters allow for an initial characterization of the atmosphere of the planet. We want to investigate the atmosphere of the hot Jupiter HAT-P-12b for an increased absorption at the very blue wavelength regions caused by scattering. Furthermore, we aim for a refinement of the transit parameters and the orbital ephemeris. We obtained time series photometry of 20 transit events and analyzed them homogeneously, along with eight light curves obtained from the literature. In total, the light curves span a range from 0.35 to 1.25 microns. During two observing seasons over four months each, we monitored the host star to constrain the potential influence of starspots on the derived transit parameters. We rule out the presence of a Rayleigh slope extending over the entire optical wavelength range, a flat spectrum is favored for HAT-P-12b with respect to a cloud-free atmosphere model spectrum. A potential cause of such gray absorption is the presence of a cloud layer at the probed latitudes. Furthermore, in this work we refine the transit parameters, the ephemeris and perform a TTV analysis in which we found no indication for an unseen companion. The host star showed a mild non-periodic variability of up to 1%. However, no stellar rotation period could be detected to high confidence.

Abstract Copyright:

Journal keyword(s): planets and satellites: atmospheres - planets and satellites: individual: HAT-P-12b - planetary systems

Simbad objects: 15

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Number of rows : 15

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HAT-P-19b Pl 00 38 04.0136161838 +34 42 41.552260901           ~ 41 1
2 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 159 1
3 WASP-19b Pl 09 53 40.0764883458 -45 39 33.055979403           ~ 251 1
4 GSC2 N130301294 * 13 57 16.641 +43 26 53.65   14.19   12.70   ~ 1 0
5 GSC2 N130301273 * 13 57 22.676 +43 35 48.15   13.26   12.13   ~ 1 0
6 GSC2 N130301284 * 13 57 24.992 +43 31 34.02   13.91   12.57   ~ 2 0
7 HAT-P-12b Pl 13 57 33.4668502171 +43 29 36.602501754           ~ 122 1
8 HAT-P-12 PM* 13 57 33.4668502171 +43 29 36.602501754   12.6 12.84     K5 57 1
9 CD-27 10695b Pl 15 59 50.9489706053 -28 03 42.309432433           ~ 197 1
10 WASP-103b Pl 16 37 15.5753608801 +07 11 00.119024745           ~ 86 1
11 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 539 1
12 HD 189733b Pl 20 00 43.7130382888 +22 42 39.071811263           ~ 1088 1
13 NAME BD+37 4734Bb Pl 22 57 46.8443014981 +38 40 30.355384717           ~ 198 1
14 WASP-10 V* 23 15 58.3005497925 +31 27 46.294728182   12.4   12.03   K5V 74 1
15 CD-40 15273b Pl 23 51 31.0840161955 -39 54 24.259966546           ~ 49 1

    Equat.    Gal    SGal    Ecl

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2020.08.11-22:27:00

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