2017MNRAS.468.3907K

Query : 2017MNRAS.468.3907K

2017MNRAS.468.3907K - Mon. Not. R. Astron. Soc., 468, 3907-3916 (2017/July-2)

Rayleigh scattering in the transmission spectrum of HAT-P-18b.

KIRK J., WHEATLEY P.J., LOUDEN T., DOYLE A.P., SKILLEN I., McCORMAC J., IRWIN P.G.J. and KARJALAINEN R.

Abstract (from CDS):

We have performed ground-based transmission spectroscopy of the hot Jupiter HAT-P-18b using the ACAM instrument on the William Herschel Telescope (WHT). Differential spectroscopy over an entire night was carried out at a resolution of R ≃ 400 using a nearby comparison star. We detect a blueward slope extending across our optical transmission spectrum that runs from 4750 to 9250 Å. The slope is consistent with Rayleigh scattering at the equilibrium temperature of the planet (852 K). We do not detect enhanced sodium absorption, which indicates that a high-altitude haze is masking the feature and giving rise to the Rayleigh slope. This is only the second discovery of a Rayleigh-scattering slope in a hot Jupiter atmosphere from the ground, and our study illustrates how ground-based observations can provide transmission spectra with precision comparable to the Hubble Space Telescope.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: observational - techniques: spectroscopic - planets and satellites: atmospheres - planets and satellites: individual: HAT-P-18b - planets and satellites: individual: HAT-P-18b

VizieR on-line data: <Available at CDS (J/MNRAS/468/3907): table1.dat>

Simbad objects: 12

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Number of rows : 12
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-12b Pl 06 30 32.7966092352 +29 40 20.263502460           ~ 847 1
2 WASP-31b Pl 11 17 45.3578677224 -19 03 17.217631800           ~ 143 1
3 HAT-P-12b Pl 13 57 33.4668726399 +43 29 36.601508739           ~ 201 1
4 HAT-P-12 PM* 13 57 33.4668726399 +43 29 36.601508739   13.851 12.766 12.428   K5 113 1
5 WASP-39b Pl 14 29 18.4151689656 -03 26 40.204480380           ~ 345 1
6 WASP-39 * 14 29 18.4151689656 -03 26 40.204480380   12.93 12.09 12.17 11.29 ~ 106 1
7 TYC 2594-731-1 * 17 05 08.5177481520 +33 02 19.533842844   12.62 11.36     ~ 7 0
8 HAT-P-18b Pl 17 05 23.1475097496 +33 00 44.940001716           ~ 153 1
9 HAT-P-18 Em* 17 05 23.1475097496 +33 00 44.940001716   11.9   12.61   K2V 81 1
10 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1610 1
11 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 2037 1
12 WASP-6b Pl 23 12 37.7368282608 -22 40 26.273805024           ~ 150 1

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