Warm ISM in the Sgr A complex. II. The [C/N] abundance ratio traced by [CII] 158 μm and [NII] 205 μm observations toward the Arched Filaments at the Galactic center
We showed that the fraction of [CII] - HII Region related emission varies a lot for any given line-of-sight, and it can be as high as 70% of the total observed[CII] emission. Those results were then used to predict the [N/H] elemental abundance in the GC (a value poorly constraint in the GC). Our results showed that it should be much larger ~x7.5 than what is measured in the Galactic Disk, and nearly x2.3 larger than previous measurements int he Arched Filaments.