Abstract
We present BIMA (Berkeley-Illinois-Maryland Association) array observations of the SiO v = 0, J = 2-1 transition toward the Sgr B2 star formation region. The observations have angular and spectral resolutions of 45 × 98 (α × δ) and 1.35 km s-1, respectively. Emission from the Sgr B2(M) region indicates the presence of an outflow with velocities up to 30 km s-1. The derived outflow mass is 210 M☉ assuming an SiO fractional abundance of 10-7. No emission was detected from the Sgr B2(N) region, possibly because SiO is underabundant in the Sgr B2(N) core. SiO absorption is observed toward both the Sgr B2(M) and B2(N) continuum sources. This absorption probably results from the extended low-density envelope of the Sgr B2 cloud.
Published Version
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