Universität zu Köln

Feddersen, Jesse R., Arce, Hector G., Kong, Shuo ORCID: 0000-0002-8469-2029, Ossenkopf-Okada, Volker ORCID: 0000-0002-8351-3877 and Carpenter, John M. (2019). The CARMA-NRO Orion Survey: Statistical Signatures of Feedback in the Orion A Molecular Cloud. Astrophys. J., 875 (2). BRISTOL: IOP PUBLISHING LTD. ISSN 1538-4357

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Abstract

We investigate the relationship between turbulence and feedback in the Orion A molecular cloud using maps of (CO)-C-12(1-0), (CO)-C-13(1-0), and (CO)-O-18(1-0) from the CARMA-NRO Orion survey. We compare gas statistics with the impact of feedback in different parts of the cloud to test whether feedback changes the structure and kinematics of molecular gas. We use principal component analysis, the spectral correlation function, and the spatial power spectrum to characterize the cloud. We quantify the impact of feedback with momentum injection rates of protostellar outflows and wind-blown shells as well as the surface density of young stars. We find no correlation between shells or outflows and any of the gas statistics. However, we find a significant anticorrelation between young star surface density and the slope of the (CO)-C-12 spectral correlation function, suggesting that feedback may influence this statistic. While calculating the principal components, we find peaks in the covariance matrix of our molecular line maps offset by 1-3 km s(-1) toward several regions of the cloud that may be produced by feedback. We compare these results to predictions from molecular cloud simulations.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Feddersen, Jesse R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Arce, Hector G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kong, Shuo UNSPECIFIED orcid.org/0000-0002-8469-2029 UNSPECIFIED Ossenkopf-Okada, Volker UNSPECIFIED orcid.org/0000-0002-8351-3877 UNSPECIFIED Carpenter, John M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-150498
DOI:	10.3847/1538-4357/ab0e7d
Journal or Publication Title:	Astrophys. J.
Volume:	875
Number:	2
Date:	2019
Publisher:	IOP PUBLISHING LTD
Place of Publication:	BRISTOL
ISSN:	1538-4357
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SPECTRAL CORRELATION-FUNCTION; PRINCIPAL COMPONENT ANALYSIS; OUTFLOW-DRIVEN TURBULENCE; POWER SPECTRUM; STAR-FORMATION; INTERSTELLAR TURBULENCE; HIGH-RESOLUTION; CO OUTFLOWS; REGION; (CO)-C-12 Multiple languages Astronomy & Astrophysics Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/15049