SIMBAD references

2015MNRAS.449.1782S - Mon. Not. R. Astron. Soc., 449, 1782-1796 (2015/May-2)

The JCMT Gould Belt Survey: properties of star-forming filaments in Orion A North.

SALJI C.J., RICHER J.S., BUCKLE J.V., DI FRANCESCO J., HATCHELL J., HOGERHEIJDE M., JOHNSTONE D., KIRK H., WARD-THOMPSON D. (The JCMT GBS Consortium)

Abstract (from CDS):

We develop and apply a Hessian-based filament detection algorithm to submillimetre continuum observations of Orion A North. The resultant filament radial density profiles are fitted with beam-convolved line-of-sight Plummer-profiles using Markov chain Monte Carlo techniques. The posterior distribution of the radial decay parameter demonstrates that the majority of filaments exhibit p = 1.5-3, with a mode at p = 2.2, suggesting deviation from the Ostriker p = 4 isothermal, equilibrium, self-gravitating cylinder. The spatial distribution of young stellar objects relative to the high column density filaments is investigated, yielding a lower limit on the star-forming age of the integral-shaped filament ∼ 1.4 Myr. Additionally, inferred lifetimes of filaments are examined which suggest long-term filament accretion, varying rates of star formation, or both. Theoretical filament stability measures are determined with the aid of HARP C18O J = 3-2 observations and indicate that the majority of filaments are gravitationally subcritical, despite the presence of young protostars. The results from this investigation are consistent with the one-dimensional accretion flow filament model recently observed in numerical simulations.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): stars: formation - stars: protostars - ISM: structure - submillimetre: ISM

Simbad objects: 7

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2019.12.14-19:22:24

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