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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 448299.0, MPI für Astronomie / Publikationen_mpia
Molecular signatures in the near-infrared dayside spectrum of HD 189733b
Authors:Swain, M. R.; Vasisht, G.; Tinetti, G.; Bouwman, J.; Chen, Pin; Yung, Y.; Deming, D.; Deroo, P.
Language:English
Date of Publication (YYYY-MM-DD):2009
Title of Journal:The Astrophysical Journal Letters
Volume:690
Issue / Number:2
Start Page:L114
End Page:L117
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We have measured the dayside spectrum of HD 189733b between 1.5 and 2.5 μm using the NICMOS instrument on the Hubble Space Telescope. The emergent spectrum contains significant modulation, which we attribute to the presence of molecular bands seen in absorption. We find that water (H2O), carbon monoxide (CO), and carbon dioxide (CO2) are needed to explain the observations, and we are able to estimate the mixing ratios for these molecules. We also find temperature decreases with altitude in the ~0.01 < P< ~1 bar region of the dayside near-infrared photosphere and set an upper limit to the dayside abundance of methane (CH4) at these pressures.
Free Keywords:planetary systems; techniques: spectroscopic
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2009ApJ...690L.114S [ID No:1]
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