Universität zu Köln

Suri, Sumeyye, Sanchez-Monge, Alvaro, Schilke, Peter ORCID: 0000-0003-2141-5689, Clarke, Seamus D., Smith, Rowan J., Ossenkopf-Okada, Volker, Klessen, Ralf, Padoan, Paolo, Goldsmith, Paul, Arce, Hector G., Bally, John, Carpenter, John M., Ginsburg, Adam, Johnstone, Doug, Kauffmann, Jens, Kong, Shuo, Lis, Dariusz C., Mairs, Steve, Pillai, Thushara, Pineda, Jaime E. and Duarte-Cabral, Ana (2019). The CARMA-NRO Orion Survey Filamentary structure as seen in (CO)-O-18 emission. Astron. Astrophys., 623. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

Context. We present an initial overview of the filamentary structure in the Orion A molecular cloud utilizing a high angular and velocity resolution (CO)-O-18(1-0) emission map that was recently produced as part of the CARMA-NRO Orion Survey. Aims. The main goal of this study is to build a credible method to study varying widths of filaments which has previously been linked to star formation in molecular clouds. Due to the diverse star forming activities taking place throughout its similar to 20 pc length, together with its proximity of 388 pc, the Orion A molecular cloud provides an excellent laboratory for such an experiment to be carried out with high resolution and high sensitivity. Methods. Using the widely-known structure identification algorithm, DisPerSE, on a three-dimensional (PPV) (CO)-O-18 cube, we identify 625 relatively short (the longest being 1.74 pc) filaments over the entire cloud. We studied the distribution of filament widths using FilChaP, a python package that we have developed and made publicly available. Results. We find that the filaments identified in a two square-degree PPV cube do not overlap spatially, except for the complex OMC-4 region that shows distinct velocity components along the line of sight. The filament widths vary between 0.02 and 0.3 pc depending on the amount of substructure that a filament possesses. The more substructure a filament has, the larger is its width. We also find that despite this variation, the filament width shows no anticorrelation with the central column density which is in agreement with previous Herschel observations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Suri, Sumeyye UNSPECIFIED UNSPECIFIED UNSPECIFIED Sanchez-Monge, Alvaro UNSPECIFIED UNSPECIFIED UNSPECIFIED Schilke, Peter UNSPECIFIED orcid.org/0000-0003-2141-5689 UNSPECIFIED Clarke, Seamus D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Smith, Rowan J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ossenkopf-Okada, Volker UNSPECIFIED UNSPECIFIED UNSPECIFIED Klessen, Ralf UNSPECIFIED UNSPECIFIED UNSPECIFIED Padoan, Paolo UNSPECIFIED UNSPECIFIED UNSPECIFIED Goldsmith, Paul UNSPECIFIED UNSPECIFIED UNSPECIFIED Arce, Hector G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bally, John UNSPECIFIED UNSPECIFIED UNSPECIFIED Carpenter, John M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Ginsburg, Adam UNSPECIFIED UNSPECIFIED UNSPECIFIED Johnstone, Doug UNSPECIFIED UNSPECIFIED UNSPECIFIED Kauffmann, Jens UNSPECIFIED UNSPECIFIED UNSPECIFIED Kong, Shuo UNSPECIFIED UNSPECIFIED UNSPECIFIED Lis, Dariusz C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mairs, Steve UNSPECIFIED UNSPECIFIED UNSPECIFIED Pillai, Thushara UNSPECIFIED UNSPECIFIED UNSPECIFIED Pineda, Jaime E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Duarte-Cabral, Ana UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-153514
DOI:	10.1051/0004-6361/201834049
Journal or Publication Title:	Astron. Astrophys.
Volume:	623
Date:	2019
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language STAR-FORMING FILAMENTS; STABILITY Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15351