DENSE GAS IN NEARBY GALAXIES .6. A LARGE C-12/C-13 RATIO IN A NUCLEAR STARBURST ENVIRONMENT

C. Henkel, R. Mauersberger, T. Wiklind, S. Huttemeister, C. Lemme, TJ Millar

Research output: Contribution to journalArticle

Abstract

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.
Original languageEnglish
Pages (from-to)L17-L20
Number of pages4
JournalAstronomy and Astrophysics
Volume268
Publication statusPublished - 1993

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