Assessing the Impact of Astrochemistry on Molecular Cloud Turbulence Statistics
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Boyden_2018_ApJ_860_157.pdf
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Final Published version
Affiliation
Univ Arizona, Steward ObservUniv Arizona, Dept Astron
Issue Date
2018-06-20
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IOP PUBLISHING LTDCitation
Ryan D. Boyden et al 2018 ApJ 860 157Journal
ASTROPHYSICAL JOURNALRights
© 2018. The American Astronomical Society. All rights reserved.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
We analyze hydrodynamic simulations of turbulent, star-forming molecular clouds that are post-processed with the photodissociation region astrochemistry code 3D-PDR. We investigate the sensitivity of 15 commonly applied turbulence statistics to post-processing assumptions, namely, variations in gas temperature, abundance, and external radiation field. We produce synthetic (CO)-C-12 (1-0) and CI (P-3(1)-P-3(0)) observations and examine how the variations influence the resulting emission distributions. To characterize differences between the data sets, we perform statistical measurements, identify diagnostics sensitive to our chemistry parameters, and quantify the statistic responses by using a variety of distance metrics. We find that multiple turbulent statistics are sensitive not only to the chemical complexity but also to the strength of the background radiation field. The statistics with meaningful responses include principal component analysis, spatial power spectrum, and bicoherence. A few of the statistics, such as the velocity coordinate spectrum, are primarily sensitive to the type of tracer being utilized, while others, like the.-variance, strongly respond to the background radiation field. Collectively, these findings indicate that more realistic chemistry impacts the responses of turbulent statistics and is necessary for accurate statistical comparisons between models and observed molecular clouds.ISSN
1538-4357Version
Final published versionSponsors
NSF AAG [AST-1510021]; NSERC of CanadaAdditional Links
http://stacks.iop.org/0004-637X/860/i=2/a=157?key=crossref.a1bb947ff13615471a3e20e7bbfe4d19ae974a485f413a2113503eed53cd6c53
10.3847/1538-4357/aac76d