Large Scale Distribution of CN in the Central Molecular Zone: PDR or Weak XDR?

Details Large Scale Distribution of CN in the Central Molecular Zone: PDR or Weak XDR? Large Scale Distribution of CN in the Central Molecular Zone: PDR or Weak XDR?

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aspc..439...33t&link_type=abstract

The Galactic Center: a Window to the Nuclear Environment of Disk Galaxies. Proceedings of a workshop held at Shanghai, China on

Astronomy and Astrophysics

Astronomy

Scientific paper

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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