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| Paper: |
Large Scale Distribution of CN in the Central Molecular Zone: PDR or Weak XDR? |
| Volume: |
439, The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies |
| Page: |
33 |
| Authors: |
Tanaka, K.; Oka, T.; Nagai, M.; Kamegai, K. |
| Abstract: |
We present the results of observation of the HCN and CN lines toward the Central Molecular Zone with the NRO 45m Telescope.
The CN/HCN intensity ratio peaks near Sgr A* and decreases toward the outer region of the CMZ.
This could be explained by the XDR model, if Sgr A* was in very active phase in recent past, although the value of the [CN]/[HCN] abundance ratio, ranging from 0.1 to 1, is explained better by the PDR model. |
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