|
|||||
|
|
The shocked gas distribution around CepA: the H2S and SO2 picture |
|
| Authors: | Claudio Codella Rafael Bachiller Milena Benedettini Paola Caselli |
| Affiliation: | 1. Istituto di Radioastronomia, CNR, Sezione di Firenze, Largo E. Fermi 5, 50125, Firenze, Italy 2. Observatorio Astronómico Nacional (IGN), Apartado 1143, -28800, Alcalá de Henares (Madrid), Spain 3. Istituto di Fisica dello Spazio Interplanetario, CNR, Area di Ricerca Tor Vergata, Via Fosso del Cavaliere 100, 00133, Roma, Italy 4. INAF, Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125, Firenze, Italy |
| Abstract: | The preliminary results from a multiline mm-wave survey of H2S and SO2 emission towards the Cepheus A star forming region are presented. Large scale maps (? 5'×4') and high-resolution line profiles which clearly indicate the occurrence of multiple H2S and SO2 outflows are reported. In particular, a 0.6 pc long outflow flowing towards South from the CepA-East position has been discovered. In addition, besides the well known regions CepA-East and CepA-West other four clumps of shocked gas have been detected. These clumps exhibit distinct H2S/SO2 ratios, suggesting different chemical compositions for different regions and show that in Cepheus A the mass loss has strongly modified the chemistry of the quiescent gas. |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ | |