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 (19)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• THINGS: The HI Nearby Galaxy Survey
• Structural Analysis of Molecular Clouds: Dendrograms
• The photodissociation and chemistry of CO isotopologues: applications to interstellar clouds and circumstellar disks
• An Origin of Supersonic Motions in Interstellar Clouds
• Thermal condensation in a turbulent atomic hydrogen flow
• Molecular cloud evolution. I. Molecular cloud and thin CNM sheet formation
• Abundances and Behavior of 12CO, 13CO, and C2 in Translucent Sight Lines
• Numerical biases on IMF determinations created by binning
• The Fine-Scale Structure of the neutral Interstellar Medium in nearby Galaxies
• HI shells in the outer Milky Way
• Supershells as Molecular Cloud Factories: Parsec Resolution Observations of HI and 12CO(J=1-0) in GSH 287+04-17 and GSH 277+00+36
• The fragmentation of expanding shells I: Limitations of the thin--shell approximation
• The fragmentation of expanding shells II: Thickness matters
• 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
• Catalogue of 12CO(J=1-0) and 13CO(J=1-0) Molecular Clouds in the Carina Flare Supershell
• The fragmentation of expanding shells III: Oligarchic accretion and the mass spectrum of fragments
• APEX CO(3-2) observations of NGC6822

Cited by in corpus (14)

• 'The Brick' is not a brick: A comprehensive study of the structure and dynamics of the Central Molecular Zone cloud G0.253+0.016
• Clumps and triggered star formation in ionised molecular clouds
• Supergiant Shells and Molecular Cloud Formation in the LMC
• Filamentary Star Formation in NGC 1275
• Synthetic observations of star formation and the interstellar medium
• The Herschel Exploitation of Local Galaxy Andromeda (HELGA). VI. The distribution and properties of molecular cloud associations in M31
• A Survey of Irradiated Pillars, Globules, and Jets in the Carina Nebul
• Exploring GLIMPSE Bubble N107: Multiwavelength Observations and Simulations
• Gravitational Instability of Rotating, Pressure-Confined, Polytropic Gas Disks With Vertical Stratification
• JWST Observations of Starbursts: Relations between PAH features and CO clouds in the starburst galaxy M 82
• Correlation of HI shells and CO clumps in the outer Milky Way
• GS242-03+37: a lucky survivor in the galactic gravitational field
• Gould's Belt
• Physical Conditions in the LMC's Quiescent Molecular Ridge: Fitting Non-LTE Models to CO Emission