Molecular Signatures in the Near Infrared Dayside Spectrum of HD 189733b

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dc.creatorSwain, M. R.
dc.creatorVasisht, G.
dc.creatorTinetti, G.
dc.creatorBouwman, J.
dc.creatorChen, Pin
dc.creatorYung, Y.
dc.creatorDeming, D.
dc.creatorDeroo, P.
dc.date2008-12-10
dc.date2008-12-10
dc.date.accessioned2026-07-07T12:11:37Z
dc.date.available2026-07-07T12:11:37Z
dc.descriptionWe have measured the dayside spectrum of HD 189733b between 1.5 and 2.5 microns 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.
dc.description13 pages, 3 figures. accepted in Astrophysical Journal Letters
dc.identifierhttps://arxiv.org/abs/0812.1844
dc.identifierhttp://arxiv.org/abs/0812.1844
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210276
dc.subjectAstrophysics
dc.titleMolecular Signatures in the Near Infrared Dayside Spectrum of HD 189733b
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