Toward the starburst nucleus of NGC 253, C-12/C-13 line intensity ratios from six carbon bearing molecules (CO, CN, CS, HCN, HCO+, and HNC) are used to confine the possible range of carbon and oxygen isotope ratios. A detailed analysis yields C-12/C-13 approximately 40 and O-16/O-18 approximately 200. Also reported are first detections of (CS)-C-13 and of the 0(0) - 1(-1) E line of methanol (CH3OH) in an extragalactic source.
|Number of pages||4|
|Journal||Astronomy and Astrophysics|
|Publication status||Published - 1993|
Henkel, C., Mauersberger, R., Wiklind, T., Huttemeister, S., Lemme, C., & Millar, TJ. (1993). DENSE GAS IN NEARBY GALAXIES .6. A LARGE C-12/C-13 RATIO IN A NUCLEAR STARBURST ENVIRONMENT. Astronomy and Astrophysics, 268, L17-L20.