| |
 |
| Paper: |
Large-scale Shocks in NGC 253: The First Interferometer SiO Map of an External Galaxy |
| Volume: |
197, XVth IAP Meeting Dynamics of Galaxies: From the Early Universe to the Present |
| Page: |
189 |
| Authors: |
García-Burillo, S. |
| Abstract: |
The nucleus of the starburst spiral NGC253 has been mapped in the v = 0,J = 2-1 line of SiO, a privileged tracer of shock chemistry, using the IRAM interferometer. Our map, that includes simultaneous observations of H13CO+, shows that SiO comes from a 600pc circumnuclear disk (CND) displaying a rich hierarchy of substructures and a distorted kinematics. The chemical history of the starburst is analysed studying the ratio R = N(SiO) / N(H13CO+), strongly variable within the CND. The processing of gas by large-scale shocks is discussed. |
|
|
|
|
|
