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

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

2011-11-18

arxiv.org/abs/1111.4391v2

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

19 pages, 14 figures, accepted by A&A

Scientific paper

$^{13}$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.

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