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- W2140216441 abstract "Abstract High resolution NIR spectroscopy offers an excellent complement to the expanding dataset of transit and secondary eclipse observations of exo-planets with Spitzer that have provided the bulk of our understanding of the atmospheres and internal structure of these objects. High-resolution data can quantify the vertical temperature structure by isolating specific spectral lines formed at various depths. The presence of an opaque absorbing layer can also be inferred - and its pressure level determined quantitatively - via its effect on spectral line intensities. We have analyzed data for a single secondary eclipse of the bright transiting exo-planet host star HD189733 at L-band wavelengths (3–4 μm) using the NIRSPEC instrument on Keck-II. We utilize a sophisticated first-order telluric absorption modeling technique that, combined with a calibration star, has already been proven to remove the effects of varying atmospheric transmittance and allow us to reach unprecedented S/N. We are conducting validation of the final data reduction products and developing high-resolution atmospheric models for comparison, but we have already been able to rule out emission from methane as reported by Swain et al . (2010). We present preliminary results and discuss future plans for analysis and observations." @default.
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- W2140216441 date "2010-10-01" @default.
- W2140216441 modified "2023-09-27" @default.
- W2140216441 title "A NIR spectrum of a hot Jupiter from the ground: Preliminary results" @default.
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- W2140216441 doi "https://doi.org/10.1017/s1743921311020114" @default.
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