Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy
Hedelt, P and Alonso, R and Brown, P. and Collados, Manuel and Rauer, H. and Schleicher, Helmold and Schmidt, W. and Schreier, Franz and Titz-Weider, R (2011) Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy. Astronomy and Astrophysics, 533 (A136), pp. 1-8. EDP Sciences . DOI: 10.1051/00046361201016237 . ISSN 0004-6361.
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The transit of Venus in 2004 offered the rare possibility to remotely sense a well-known planetary atmosphere using ground-based absorption spectroscopy. Transmission spectra of Venus’ atmosphere were obtained in the near infrared using the Vacuum Tower Telescope (VTT) in Tenerife. Since the instrument was designed to measure the very bright photosphere of the Sun, extracting Venus’ atmosphere was challenging. We were able to identify CO2 absorption lines in the upper Venus atmosphere. Moreover, the relative abundance of the three most abundant CO2 isotopologues could be determined. The observations resolved Venus’ limb, showing Doppler-shifted absorption lines that are probably caused by high-altitude winds. We demonstrate the utility of groundbased measurements in analyzing the atmospheric constituents of a terrestrial planet atmosphere using methods that might be applied in future to terrestrial extrasolar planets.
|Title:||Venus transit 2004: Illustrating the capability of exoplanet transmission spectroscopy|
|Journal or Publication Title:||Astronomy and Astrophysics|
|In Open Access:||No|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 1-8|
|Series Name:||Planets and planetary systems|
|Keywords:||planets and satellites: atmospheres / planets and satellites: composition / planets and satellites: detection / radiative transfer / techniques: spectroscopic|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben Exploration des Sonnensystems|
|Institutes and Institutions:||Remote Sensing Technology Institute > Atmospheric Processors|
Institute of Planetary Research > Extrasolar Planets and Atmospheres
|Deposited By:||Ulrike Stiebeler|
|Deposited On:||27 Jan 2012 14:53|
|Last Modified:||08 May 2013 08:31|
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