Author： Rodler Florian
Publisher： Edp Sciences
E-ISSN： 2100-014x|47|issue|11003-11003
ISSN： 2100-014x
Source： EPJ Web of Conference, Vol.47, Iss.issue, 2013-04, pp. : 11003-11003
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Abstract
With time-series spectroscopic observations taken with the Near Infrared Spectrometer (NIRSPEC) at Keck II, we investigated the atmosphere of the close orbiting transiting extrasolar giant planet, HD 189733b. In paticular, we intended to measure the dense absorption line forest around 2.3 micron, which is produced by carbon monoxide (CO). CO is expected to be present in the planetary atmosphere, although no detection of this molecule has been claimed yet. We analyzed the NIRSPEC data with cross-correlation and detect CO absorption in the day-side spectrum of HD 189733b at the known planetary radial velocity semi-amplitude with 99.54% (2.8σ) confidence.
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