Venus bowshock precursor

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Venus.

Mary Ellen Avery Treasurer Francisco J. Ayala Richard S. Nicholson Robert A. Frosch Executive Officer John Abelson Frederick W. Alt Don L. Anderson Stephen J. Benkovic David E. Bloom Floyd E. Bloom Henry R. Bourne James J. Bull Kathryn Calame C. Thomas Caskey Dennis W. Choi John M. Coffin Bruce F. Eldridge Paul T. Englund Richard G. Fairbanks Douglas T. Fearon Harry A. Fozzard Victor R. Fuchs T...

Interpreting the Proper Motions of the Hh 34s Bowshock

Reipurth et al. (2002) have obtained very detailed proper motions of the HH 34S bowshock using Hubble Space Telescope (HST) images. We find that these proper motions can be used to reconstruct the position-dependent shock velocity and the flow velocity ahead of the bowshock. From this excercise, we obtain shock velocities in the 60 to 120 km s range, in qualitative agreement with previous deter...

Venus Cloud Properties from Venus Express VIRTIS Observations

Near-infrared spectra from the Visible and Infrared Thermal Imaging Spectrometer (VIRTIS) on Venus Express have been used to investigate the vertical structure and global distribution of cloud properties on Venus. The spectral range covered by VIRTIS is sensitive on the nightside to absorption by the lower and middle cloud layers, which are back-lit by radiation from the lower atmosphere and su...

Venus Surface Thermal Emission Observed by VIRTIS on Venus Express

The imaging spectrometer VIRTIS is the flight spare of the instrument of the same name on the Rosetta mission. It was refitted to be part of the Venus Express mission orbiting Venus since 2006. VIRTIS can observe nightside thermal emissions at the wavelengths of several atmospheric windows. In three of these windows atmospheric transparency is sufficient to allow a measurable amount of radiatio...