The Carina Flare: What can fragments in the wall tell us?

Abstract

${}^{13}$CO(J=2--1) and C${}^{18}$O(J=2--1) observations of the molecular cloud G285.90+4.53 (Cloud~16) in the Carina Flare supershell (GSH287+04-17) with the APEX telescope are presented. With an algorithm DENDROFIND we identify 51 fragments and compute their sizes and masses. We discuss their mass spectrum and interpret it as being the result of the shell fragmentation process described by the pressure assisted gravitational instability - PAGI. We conclude that the explanation of the clump mass function needs a combination of gravity with pressure external to the shell.

19 pages, 14 figures, accepted by A&A

References in corpus (5)

• Structural Analysis of Molecular Clouds: Dendrograms
• Abundances and Behavior of 12CO, 13CO, and C2 in Translucent Sight Lines
• The "Carina Flare" Supershell: Probing the Atomic and Molecular ISM in a Galactic Chimney
• Molecular Clouds in Supershells: A Case Study of Three Objects in the Walls of GSH 287+04-17 and GSH 277+00+36
• APEX CO(3-2) observations of NGC6822

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