2024ApJ...969L..19F

Query : 2024ApJ...969L..19F

2024ApJ...969L..19F - Astrophys. J., 969, L19 (2024/July-1)

Debris Disks Can Contaminate Mid-infrared Exoplanet Spectra: Evidence for a Circumstellar Debris Disk around Exoplanet Host WASP-39.

FLAGG L., WEINBERGER A.J., BELL T.J., WELBANKS L., MORELLO G., POWELL D., BEAN J.L., BLECIC J., CROUZET N., GAO P., INGLIS J., KIRK J., LOPEZ-MORALES M., MOLAVERDIKHANI K., NIKOLOV N., OZA A.V., RACKHAM B.V., REDFIELD S., TSAI S.-M., JAYAWARDHANA R., KREIDBERG L., NIXON M.C., STEVENSON K.B. and TURNER J.D.

Abstract (from CDS):

The signal from a transiting planet can be diluted by astrophysical contamination. In the case of circumstellar debris disks, this contamination could start in the mid-infrared and vary as a function of wavelength, which would then change the observed transmission spectrum for any planet in the system. The MIRI/Low Resolution Spectrometer WASP-39b transmission spectrum shows an unexplained dip starting at ∼10 μm that could be caused by astrophysical contamination. The spectral energy distribution displays excess flux at similar levels to that which are needed to create the dip in the transmission spectrum. In this Letter, we show that this dip is consistent with the presence of a bright circumstellar debris disk, at a distance of >2 au. We discuss how a circumstellar debris disk like that could affect the atmosphere of WASP-39b. We also show that even faint debris disks can be a source of contamination in MIRI exoplanet spectra.

Abstract Copyright: © 2024. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Debris disks - Exoplanet atmospheres - Infrared spectroscopy - Spectral energy distribution - Circumstellar dust - Exoplanet evolution - Exoplanet atmospheric composition

Simbad objects: 2

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Number of rows : 2
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-39b Pl 14 29 18.4151689656 -03 26 40.204480380           ~ 345 1
2 WASP-39 * 14 29 18.4151689656 -03 26 40.204480380   12.93 12.09 12.17 11.29 ~ 106 1

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