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The directional analysis of star clusters

Cartwright, Annabel and Whitworth, Anthony Peter ORCID: 2008. The directional analysis of star clusters. Monthly Notices of the Royal Astronomical Society 390 (2) , pp. 807-813. 10.1111/j.1365-2966.2008.13791.x

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We introduce the Fry Plot and demonstrate its use in quantifying the directionality in star clusters. Taurus and IC2391 are both found to demonstrate a bias in the Probability Density Function (PDF) for neighbours in the same direction for both small and large separations. The Chamaeleon I cluster and Orion B North star-forming region, by contrast, show a symmetrical PDF at small scales, but a directional bias at large scale. Rho Ophiucus, NGC 1333, IC348 and Serpens Main show broadly symmetrical distribution of neighbours. The Pipe Nebula shows strong directional bias at all scales due to the existence of a dominating linear feature. This technique will be useful for quantifying features in observed and simulated objects, and for comparisons with other directional information, such as polarization, velocity and magnetic field maps.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Uncontrolled Keywords: methods: data analysis; open clusters and associations : general
Publisher: John Wiley
ISSN: 0035-8711
Last Modified: 19 Oct 2022 08:49

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