Filaments in the Lupus molecular clouds
SCHNEIDER, N.
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
Observatoire aquitain des sciences de l'univers [OASU]
Laboratoire d'Astrophysique de Bordeaux [Pessac] [LAB]
TREMBLIN, Pascal
University of Exeter
Maison de la Simulation [MDLS]
Université de Versailles Saint-Quentin-en-Yvelines [UVSQ]
University of Exeter
Maison de la Simulation [MDLS]
Université de Versailles Saint-Quentin-en-Yvelines [UVSQ]
NGUYEN-LUONG, Q.
National Astronomical Observatory of Japan [NAOJ]
Canadian Institute for Theoretical Astrophysics [CITA]
National Astronomical Observatory of Japan [NAOJ]
Canadian Institute for Theoretical Astrophysics [CITA]
WHITE, G. J.
The Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire
The Open University [Milton Keynes] [OU]
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The Rutherford Appleton Laboratory, Chilton, Didcot, Oxfordshire
The Open University [Milton Keynes] [OU]
Language
en
Article de revue
This item was published in
Monthly Notices of the Royal Astronomical Society. 2015, vol. 453, n° 2, p. 2036-2049
Oxford University Press (OUP): Policy P - Oxford Open Option A
English Abstract
We have studied the filaments extracted from the column density maps of the nearby Lupus 1, 3, and 4 molecular clouds, derived from photometric maps observed with the Herschel satellite. Filaments in the Lupus clouds have ...Read more >
We have studied the filaments extracted from the column density maps of the nearby Lupus 1, 3, and 4 molecular clouds, derived from photometric maps observed with the Herschel satellite. Filaments in the Lupus clouds have quite low column densities, with a median value of ~ 1.5 × 10$^{21}$ cm$^{-2}$ and most have masses per unit length lower than the maximum critical value for radial gravitational collapse. Indeed, no evidence of filament contraction has been seen in the gas kinematics. We find that some filaments, that on average are thermally subcritical, contain dense cores that may eventually form stars. This is an indication that in the low column density regime, the critical condition for the formation of stars may be reached only locally and this condition is not a global property of the filament. Finally, in Lupus we find multiple observational evidences of the key role that the magnetic field plays in forming filaments, and determining their confinement and dynamical evolution.Read less <
English Keywords
stars: formation
ISM: clouds
European Project
Toward a Complete View of Star Formation: The Origin of Molecular Clouds, Prestellar Cores, and Star Clusters
ANR Project
Vers une vision unifiée de la formation stellaire dans les galaxies : Origine de la structure filamentaire du milieu interstellaire, des cœurs pré-stellaires et des amas protostellaires vus avec Herschel
Origin
Hal imported