Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...209.8402s&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #84.02; Bulletin of the American Astronomical Society, V
Astronomy and Astrophysics
Astronomy
Scientific paper
We have used Guest Investigator results from the Hipparcos astrometric satellite combined with high-resolution optical spectra obtained at the Anglo-Australian Telescope to create a three-dimensional map of the stars in the ρ Oph cloud, and where the stars are in relation to the several interstellar gas components that are seen in the spectra. At least three principal gas components (and several more that are not so extensive) are interspersed among the bright stars, which can subdivided into three main groupings on the basis of RA and Dec. These main gas components are found to persist over several tens of parsecs, both laterally and radially, and there is evidence for an overall rotation of the gas, as determined by the observed radial velocities.
This research been supported by the ESA Guest Investigator program for Hipparcos, and by NASA grants to the University of Colorado and the University of Chicago.
Destree Joshua D.
Snow Theodore P.
Welty Daniel E.
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