2021MNRAS.500.5420C

Query : 2021MNRAS.500.5420C

2021MNRAS.500.5420C - Mon. Not. R. Astron. Soc., 500, 5420-5435 (2021/February-1)

An enhanced slope in the transmission spectrum of the hot Jupiter WASP-104b.

CHEN G., PALLE E., PARVIAINEN H., WANG H., VAN BOEKEL R., MURGAS F., YAN F., BEJAR V.J.S., CASASAYAS-BARRIS N., CROUZET N., ESPARZA-BORGES E., FUKUI A., GARAI Z., KAWAUCHI K., KURITA S., KUSAKABE N., DE LEON J.P., LIVINGSTON J., LUQUE R., MADRIGAL-AGUADO A., MORI M., NARITA N., NISHIUMI T., OSHAGH M., SANCHEZ-BENAVENTE M., TAMURA M., TERADA Y. and WATANABE N.

Abstract (from CDS):

We present the optical transmission spectrum of the hot Jupiter WASP-104b based on one transit observed by the blue and red channels of the Double Spectrograph (DBSP) at the Palomar 200-inch telescope and 14 transits observed by the MuSCAT2 four-channel imager at the 1.52-m Telescopio Carlos Sanchez. We also analyse 45 additional K2 transits, after correcting for the flux contamination from a companion star. Together with the transit light curves acquired by DBSP and MuSCAT2, we are able to revise the system parameters and orbital ephemeris, confirming that no transit timing variations exist. Our DBSP and MuSCAT2 combined transmission spectrum reveals an enhanced slope at wavelengths shorter than 630 nm and suggests the presence of a cloud deck at longer wavelengths. While the Bayesian spectral retrieval analyses favour a hazy atmosphere, stellar spot contamination cannot be completely ruled out. Further evidence, from transmission spectroscopy and detailed characterization of the host star's activity, is required to distinguish the physical origin of the enhanced slope.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: photometric - techniques: spectroscopic - planets and satellites: atmospheres - planets and satellites: individual: WASP-104b - planetary systems

VizieR on-line data: <Available at CDS (J/MNRAS/500/5420): tmus2.dat pbluewlc.dat pblueslc.dat predwlc.dat predslc.dat>

Simbad objects: 16

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Number of rows : 16
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 HAT-P-32b Pl 02 04 10.2774374568 +46 41 16.212315084           ~ 198 1
2 WASP-12b Pl 06 30 32.7966092352 +29 40 20.263502460           ~ 847 1
3 CD-38 3220b Pl 07 10 24.0604565856 -39 05 50.571250476           ~ 421 0
4 WASP-19b Pl 09 53 40.0765648584 -45 39 33.057187596           ~ 423 1
5 WASP-43b Pl 10 19 38.0088913464 -09 48 22.605801336           ~ 442 1
6 TYC 260-1073-1 * 10 42 24.4241 +07 26 35.171   11.66 11.12     ~ 2 0
7 WASP-104b Pl 10 42 24.6022768848 +07 26 06.291154644           ~ 38 0
8 WASP-104 * 10 42 24.6022768848 +07 26 06.291154644   12.617 11.789 11.655   G8 32 0
9 WASP-31b Pl 11 17 45.3578677224 -19 03 17.217631800           ~ 143 1
10 HAT-P-12b Pl 13 57 33.4668726399 +43 29 36.601508739           ~ 201 1
11 HAT-P-18b Pl 17 05 23.1475097496 +33 00 44.940001716           ~ 153 1
12 TrES-3 Pl 17 52 07.0184259768 +37 32 46.237377840           ~ 245 2
13 HATS-8b Pl 19 39 46.0127465208 -25 44 54.008422008           ~ 35 0
14 HD 189733b Pl 20 00 43.7129433648 +22 42 39.073143456           ~ 1610 1
15 BD-05 5432b Pl 21 00 06.1968214728 -05 05 40.034944176           ~ 219 1
16 WASP-6b Pl 23 12 37.7368282608 -22 40 26.273805024           ~ 150 1

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