Tracing high density gas in M 82 and NGC 4038

Abstract

We present the first detection of CS in the Antennae galaxies towards the NGC 4038 nucleus, as well as the first detections of two high-J (5-4 and 7-6) CS lines in the center of M 82. The CS(7-6) line in M 82 shows a profile that is surprisingly different to those of other low-J CS transitions we observed. This implies the presence of a separate, denser and warmer molecular gas component. The derived physical properties and the likely location of the CS(7-6) emission suggests an association with the supershell in the centre of M 82.

10 pages, 3 figures, ApJ Letter - ACCEPTED

References in corpus (7)

• A 2 mm spectral line survey of the starburst galaxy NGC 253
• Dense gas in luminous infrared galaxies
• A survey of submillimeter C and CO lines in nearby galaxies
• Formaldehyde as a Tracer of Extragalactic Molecular Gas I. Para-H_2CO Emission From M 82
• Molecular tracers of high mass star-formation in external galaxies
• Detection of CO+ in the nucleus of M82
• A detailed modelling of the chemically rich clumps along the CB3 outflow

Cited by in corpus (5)

• Molecular shock tracers in NGC 1068: SiO and HNCO
• The chemical footprint of AGN feedback in the outflowing circumnuclear disk of NGC 1068
• Reconstructing the shock history in the CMZ of NGC 253 with ALCHEMI
• ALMA observations of CS in NGC 1068: chemistry and excitation
• Mapping CS in Starburst Galaxies: Disentangling and Characterising Dense Gas