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.

arXiv comment10 pages, 3 figures, ApJ Letter - ACCEPTED

References in corpus (17)

• Dense Gas and Star Formation: Characteristics of Cloud Cores Associated with Water Masers
• A 2 mm spectral line survey of the starburst galaxy NGC 253
• The initial conditions of star formation in the Ophiuchus main cloud: Kinematics of the protocluster condensations
• High-Resolution Imaging of Molecular Gas and Dust in the Antennae (NGC 4038/39): Super Giant Molecular Complexes
• Dense gas in luminous infrared galaxies
• Sulfur chemistry and isotopic ratios in the starburst galaxy NGC 253
• SiO chimneys and supershells in M82
• Warm gas in central regions of nearby galaxies. Extended mapping of CO(3-2) emission
• A survey of submillimeter C and CO lines in nearby galaxies
• The Stellar Content of the Southern Tail of NGC 4038/9 and a Revised Distance
• Widespread HCO emission in the M82's nuclear starburst
• 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 High Resolution Map of 12CO J=6-5 Emission in the Starburst Galaxy M82
• A detailed modelling of the chemically rich clumps along the CB3 outflow
• Starburst Models For FIR/sub-mm/mm Line Emission. I. An Expanding Supershell Surrounding A Massive Star Cluster

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• The ATLAS 3D project - XVI. Physical parameters and spectral line energy distributions of the molecular gas in gas-rich early-type galaxies
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