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Comparison of Prestellar Core Elongations and Large-scale Molecular Cloud Structures in the Lupus I Region

Poidevin, Frédérick and Moncelsi, Lorenzo and Mroczkowski, Tony K. (2014) Comparison of Prestellar Core Elongations and Large-scale Molecular Cloud Structures in the Lupus I Region. Astrophysical Journal, 791 (1). Art. No. 43. ISSN 0004-637X. doi:10.1088/0004-637X/791/1/43.

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Turbulence and magnetic fields are expected to be important for regulating molecular cloud formation and evolution. However, their effects on sub-parsec to 100 parsec scales, leading to the formation of starless cores, are not well understood. We investigate the prestellar core structure morphologies obtained from analysis of the Herschel-SPIRE 350 μm maps of the Lupus I cloud. This distribution is first compared on a statistical basis to the large-scale shape of the main filament. We find the distribution of the elongation position angle of the cores to be consistent with a random distribution, which means no specific orientation of the morphology of the cores is observed with respect to the mean orientation of the large-scale filament in Lupus I, nor relative to a large-scale bent filament model. This distribution is also compared to the mean orientation of the large-scale magnetic fields probed at 350 μm with the Balloon-borne Large Aperture Telescope for Polarimetry during its 2010 campaign. Here again we do not find any correlation between the core morphology distribution and the average orientation of the magnetic fields on parsec scales. Our main conclusion is that the local filament dynamics—including secondary filaments that often run orthogonally to the primary filament—and possibly small-scale variations in the local magnetic field direction, could be the dominant factors for explaining the final orientation of each core.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Poidevin, Frédérick0000-0002-5391-5568
Moncelsi, Lorenzo0000-0002-4242-3015
Mroczkowski, Tony K.0000-0003-3816-5372
Additional Information:© 2014 The American Astronomical Society. Received 2014 April 30; accepted 2014 June 24; published 2014 July 24. The BLASTPol collaboration acknowledges support from NASA (through grant Numbers NAG5-12785, NAG5-13301, NNGO-6GI11G, NNX0-9AB98G, and the Illinois Space Grant Consortium), the Canadian Space Agency (CSA), the Leverhulme Trust through the Research Project Grant F/00 407/BN, Canadas Natural Sciences and Engineering Research Council (NSERC), the Canada Foundation for Innovation, the Ontario Innovation Trust, the Puerto Rico Space Grant Consortium, the Fondo Institucional para la Investigación of the University of Puerto Rico, and the National Science Foundation Office of Polar Programs. C.B.N. also acknowledges support from the Canadian Institute for Advanced Research. Finally, we thank the Columbia Scientific Balloon Facility (CSBF) staff for their outstanding work. F.P. also thanks the Spanish Ministry of Economy and Competitiveness (MINECO) under the Consolider-Ingenio project CSD2010-00064 (EPI: Exploring the Physics of Inflation) for its support.
Funding AgencyGrant Number
Illinois Space Grant ConsortiumUNSPECIFIED
Canadian Space Agency (CSA)UNSPECIFIED
Leverhulme TrustF/00 407/BN
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Innovation TrustUNSPECIFIED
Puerto Rico Space Grant ConsortiumUNSPECIFIED
Fondo Institucional para la Investigacion of the University of Puerto RicoUNSPECIFIED
Canadian Institute forAdvanced ResearchUNSPECIFIED
MINECO (Spain)CSD2010-00064
Subject Keywords:ISM: clouds; ISM: individual objects (Lupus I); ISM: magnetic fields; polarization; submillimeter: ISM
Issue or Number:1
Record Number:CaltechAUTHORS:20140828-135720459
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Official Citation:Comparison of Prestellar Core Elongations and Large-scale Molecular Cloud Structures in the Lupus I Region Frédérick Poidevin et al. 2014 ApJ 791 43
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49025
Deposited By: Jason Perez
Deposited On:29 Aug 2014 21:26
Last Modified:10 Nov 2021 18:39

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