Bibcode
Hedelt, P.; Alonso, R.; Brown, T.; Collados, M.; Rauer, H.; Schleicher, H.; Schmidt, W.; Schreier, F.; Titz, R.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 533, id.A136
Fecha de publicación:
9
2011
Revista
Número de citas
19
Número de citas referidas
16
Descripción
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
ground-based measurements in analyzing the atmospheric constituents of a
terrestrial planet atmosphere using methods that might be applied in
future to terrestrial extrasolar planets.
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Tobías
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