2017A&A...608A..26M


Query : 2017A&A...608A..26M

2017A&A...608A..26M - Astronomy and Astrophysics, volume 608A, 26-26 (2017/12-1)

Transmission spectroscopy of the hot Jupiter TrES-3 b: Disproof of an overly large Rayleigh-like feature.

MACKEBRANDT F., MALLONN M., OHLERT J.M., GRANZER T., LALITHA S., GARCIA MUNOZ A., GIBSON N.P., LEE J.W., SOZZETTI A., TURNER J.D., VANKO M. and STRASSMEIER K.G.

Abstract (from CDS):

Context. Transit events of extrasolar planets offer the opportunity to study the composition of their atmospheres. Previous work on transmission spectroscopy of the close-in gas giant (TrES)-3 b revealed an increase in absorption towards blue wavelengths of very large amplitude in terms of atmospheric pressure scale heights, too large to be explained by Rayleigh-scattering in the planetary atmosphere.
Aims. We present a follow-up study of the optical transmission spectrum of the hot Jupiter TrES-3 b to investigate the strong increase in opacity towards short wavelengths found by a previous study. Furthermore, we aim to estimate the effect of stellar spots on the transmission spectrum.
Methods. This work uses previously published long slit spectroscopy transit data of the Gran Telescopio Canarias (GTC) and published broad band observations as well as new observations in different bands from the near-UV to the near-IR, for a homogeneous transit light curve analysis. Additionally, a long-term photometric monitoring of the TrES-3 host star was performed.
Results. Our newly analysed GTC spectroscopic transit observations show a slope of much lower amplitude than previous studies. We conclude from our results the previously reported increasing signal towards short wavelengths is not intrinsic to the TrES-3 system. Furthermore, the broad band spectrum favours a flat spectrum. Long-term photometric monitoring rules out a significant modification of the transmission spectrum by unocculted star spots.

Abstract Copyright: © ESO, 2017

Journal keyword(s): planets and satellites: atmospheres - stars: individual: TrES-3 - methods: data analysis - techniques: spectroscopic - techniques: photometric - techniques: photometric

VizieR on-line data: <Available at CDS (J/A+A/608/A26): list.dat phot/* vamosb.dat vamosv.dat>

Simbad objects: 8

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Number of rows : 8
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HAT-P-32 * 02 04 10.2774374568 +46 41 16.212315084   11.79 11.44 11.23   ~ 56 1
2 HAT-P-32b Pl 02 04 10.2775457769 +46 41 16.210382751           ~ 112 1
3 HAT-P-12b Pl 13 57 33.4668726399 +43 29 36.601508739           ~ 147 1
4 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 620 1
5 1SWASP J175207.01+373246.3 V* 17 52 07.0184259768 +37 32 46.237377840   13.114 12.402 12.06 11.603 G 65 1
6 TrES-3 Pl 17 52 07.0185036683 +37 32 46.237002085           ~ 211 2
7 2MASS J17520839+3732378 * 17 52 08.3916930312 +37 32 37.819658616           ~ 2 0
8 HD 209458 V* 22 03 10.7727465312 +18 53 03.549393384   8.21 7.63     F9V 1042 1

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2022.05.28-22:36:24

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