Observing Turbulent Fragmentation in Simulations: Predictions for CARMA and ALMA

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Observing Turbulent Fragmentation in Simulations: Predictions for CARMA and ALMA

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Title: Observing Turbulent Fragmentation in Simulations: Predictions for CARMA and ALMA
Author: Offner, Stella S. R.; Capodilupo, John Vincenzo; Schnee, Scott; Goodman, Alyssa A.

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Citation: Offner, Stella S. R., John Vincenzo Capodilupo, Scott Schnee, and Alyssa A. Goodman. 2012. “Observing turbulent fragmentation in simulations: Predictions for CARMA and ALMA.” Monthly Notices of the Royal Astronomical Society: Letters 420 (1) (February 20): L53-L57. doi:10.1111/j.1745-3933.2011.01194.x. http://dx.doi.org/10.1111/j.1745-3933.2011.01194.x.
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Abstract: Determining the initial stellar multiplicity is a challenging problem since protostars are faint and deeply embedded at early times; once formed, multiple protostellar systems may significantly dynamically evolve before they are optically revealed. Interferometers such as Combined Array for Research in Millimeter-wave Astronomy (CARMA) and Atacama Large Millimeter/submillimeter Array (ALMA) make it possible to probe the scales at which turbulent fragmentation occurs in dust continuum emission, potentially constraining early stellar multiplicity. In this Letter, we present synthetic observations of starless and protostellar cores undergoing fragmentation on scales of a few thousand astronomical units to produce wide binary systems. We show that interferometric observations of starless cores by CARMA should be predominantly featureless at early stages, although wide protostellar companions should be apparent. The enhanced capabilities of ALMA improve the detection of core morphology so that it may be possible to detect substructure at earlier times. In either case, spatial filtering from interferometry reduces the observed core substructure and often eradicates traces of existing filamentary morphology on scales down to 0.025 pc. However, some missing structure may be recaptured by combining data from the ALMA full science and Atacama compact arrays.
Published Version: doi:10.1111/j.1745-3933.2011.01194.x
Other Sources: http://arxiv.org/abs/1111.4209
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11688787

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  • FAS Scholarly Articles [6464]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University

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