2018A&A...620A.142A


C.D.S. - SIMBAD4 rel 1.7 - 2020.03.29CEST18:15:28

2018A&A...620A.142A - Astronomy and Astrophysics, volume 620A, 142-142 (2018/12-1)

Deciphering the atmosphere of HAT-P-12b: solving discrepant results.

ALEXOUDI X., MALLONN M., VON ESSEN C., TURNER J.D., KELES E., SOUTHWORTH J., MANCINI L., CICERI S., GRANZER T., DENKER C., DINEVA E. and STRASSMEIER K.G.

Abstract (from CDS):


Context. Two independent investigations of the atmosphere of the hot Jupiter HAT-P-12b by two different groups resulted in discrepant solutions. Using broad-band photometry from the ground, one study found a flat and featureless transmission spectrum that was interpreted as gray absorption by dense cloud coverage. The second study made use of Hubble Space Telescope (HST) observations and found Rayleigh scattering at optical wavelengths caused by haze.
Aims. The main purpose of this work is to determine the source of this inconsistency and provide feedback to prevent similar discrepancies in future analyses of other exoplanetary atmospheres.
Methods. We studied the observed discrepancy via two methods. With further broad-band observations in the optical wavelength regions, we strengthened the previous measurements in precision, and with a homogeneous reanalysis of the published data, we were able to assess the systematic errors and the independent analyses of the two different groups.
Results. Repeating the analysis steps of both works, we found that deviating values for the orbital parameters are the reason for the aforementioned discrepancy. Our work showed a degeneracy of the planetary spectral slope with these parameters. In a homogeneous reanalysis of all data, the two literature data sets and the new observations converge to a consistent transmission spectrum, showing a low-amplitude spectral slope and a tentative detection of potassium absorption.

Abstract Copyright: © ESO 2018

Journal keyword(s): planets and satellites: gaseous planets - planets and satellites: atmospheres - stars: individual: HAT-P-12

VizieR on-line data: <Available at CDS (J/A+A/620/A142): table1.dat hatp12b.dat>

Status at CDS:  

Simbad objects: 11

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Number of rows : 11

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 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 510 1
2 GJ 3470 b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 136 1
3 WASP-31b Pl 11 17 45.3578468391 -19 03 17.216528280           ~ 83 1
4 HAT-P-12b Pl 13 57 33.4668502171 +43 29 36.602501754           ~ 115 1
5 HAT-P-12 PM* 13 57 33.4668502171 +43 29 36.602501754   12.6 12.84     K5 56 1
6 WASP-39 * 14 29 18.4151765921 -03 26 40.203046112   12.93 12.09 12.17 11.29 ~ 35 1
7 WASP-39b Pl 14 29 18.4151765921 -03 26 40.203046112           ~ 81 1
8 NAME LHS 3275b Pl 17 15 18.94 +04 57 49.7           ~ 512 1
9 TrES-3 Pl 17 52 07.0185036683 +37 32 46.237002085           ~ 191 1
10 WASP-80b Pl 20 12 40.1691752075 -02 08 39.191157456           ~ 50 1
11 HD 209458b Pl 22 03 10.7729598762 +18 53 03.548248479           ~ 1437 1

    Equat.    Gal    SGal    Ecl

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2020.03.29-18:15:28

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