Search for rings and satellites around the exoplanet CoRoT-9b using Spitzer photometry
Journal
Date Issued
2017
Author(s)
Lecavelier des Etangs, A.
•
Hébrard, G.
•
Blandin, S.
•
Cassier, J.
•
Deeg, H. J.
•
•
Bouchy, F.
•
Désert, J. -M.
•
Ehrenreich, D.
•
Deleuil, M.
•
Díaz, R. F.
•
Moutou, C.
•
Vidal-Madjar, A.
Abstract
Using Spitzer photometry at 4.5 microns, we search for rings and satellites around the long period transiting planet CoRoT-9b. We observed two transits in 2010 and 2011. From their non-detection, we derive upper limits on the plausible physical characteristics of these objects in the planet environment. We show that a satellite larger than about 2.5 Earth radii is excluded at 3σ for a wide range of elongations at the two epochs of observations. Combining the two observations, we conclude that rings are excluded for a wide variety of sizes and inclination. We find that for a ring extending up to the Roche limit, its inclination angle from the edge-on configuration as seen from the Earth must be lower than 13° in the case of silicate composition and lower than 3° in the case of material with water ice density.
Volume
603
Start page
A115
Issn Identifier
0004-6361
Ads BibCode
2017A&A...603A.115L
Rights
open.access
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