OVRO High Resolution Imaging of the Dense Molecular Gas in the Central 4 Parsecs of the Galaxy

Details OVRO High Resolution Imaging of the Dense Molecular Gas in the Central 4 Parsecs of the Galaxy OVRO High Resolution Imaging of the Dense Molecular Gas in the Central 4 Parsecs of the Galaxy

Dec 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.0407c&link_type=abstract

American Astronomical Society, 197th AAS Meeting, #04.07; Bulletin of the American Astronomical Society, Vol. 32, p.1389

Astronomy and Astrophysics

Astronomy

Scientific paper

Recent observations of the Galactic Center have shown it to be an exceedingly active region with an accreting black hole candidate (Sgr A*), a young hot stellar cluster within the central parsec, and a surrounding Circumnuclear Disk (CND) of dense molecular gas. In an attempt to better understand the physical processes near the Galactic Center, we present high spatial and spectral resolution images of HCO+ and HCN emission within the central 4 parsecs of the Galaxy. HCO+ and HCN are excellent tracers of molecular gas with densities greater than 105 cm-3. Using the Owens Valley Radio Observatory (OVRO) millimeter array, we achieve a spatial resolution of 2-3", corresponding to a physical size of approximately .1 pc. These observations reveal a large amount of small scale clumpiness within the CND as well as the presence of long linear, filamentary structures which appear over the range of 4-5 spectral channels (28-35 km/s). These linear filaments could be shock-related structures, and we investigate this hypothesis by examining the kinematic structure of these filaments as seen in our OVRO observations and by comparing the HCN and HCO+ distributions with published molecular hydrogen maps.

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