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| Paper: |
Ionized Gas in the SGR A Complex -- VLA Observations of H168α and H270α Recombination Lines |
| Volume: |
186, The Central Parsecs of the Galaxy |
| Page: |
422 |
| Authors: |
Anantharamaiah, K. R.; Pedlar, A.; Goss, W. M. |
| Abstract: |
Radio recombination lines at λ = 20 cm reveal the presence of an extended component of ionized gas of lower density (~100 cm3) in the Sgr A complex. This component extends well beyond the thermal `mini-spiral' Sgr A-West which seem to be embedded in it. The low-density component is present over the entire extent of Sgr A East and possibly beyond and it is responsible for the turnover in the spectrum of Sgr A East and the halo observed by Pedlar et al (1989) at λ = 90 cm. The radial velocity of the extended ionized gas ranges from +50 kms- to --200 kms- with minima of emission near --50 and --150 kms. The total mass of the low-density component is estimated to be ~104 Modot. A possible extended feature at a high velocity of 470 kms- is also detected, but needs further observations to confirm it. |
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