2008AJ....136.2897R -
Astron. J., 136, 2897-2920 (2008/December-0)
Multi-scale CLEAN: a comparison of its performance against classical CLEAN on galaxies using THINGS.
RICH J.W., DE BLOK W.J.G., CORNWELL T.J., BRINKS E., WALTER F., BAGETAKOS I. and KENNICUTT R.C.
Abstract (from CDS):
A practical evaluation of the multi-scale CLEAN algorithm is presented. The data used in the comparisons are taken from The H I Nearby Galaxy Survey. The implementation of multi-scale CLEAN in the CASA software package is used, although comparisons are made against the very similar multi-resolution CLEAN algorithm implemented in AIPS. Both are compared against the classical CLEAN algorithm (as implemented in AIPS). The results of this comparison show that several of the well-known characteristics and issues of using classical CLEAN are significantly lessened (or eliminated completely) when using the multi-scale CLEAN algorithm. Importantly, multi-scale CLEAN significantly reduces the effects of the clean "bowl" that is caused by missing short-spacings, and the "pedestal" of low-level un-cleaned flux (which affects flux scales and resolution). Multi-scale CLEAN can clean down to the noise level without the divergence suffered by classical CLEAN. We discuss practical applications of the added contrast provided by multi-scale CLEAN using two selected astronomical examples: H I holes in the interstellar medium and anomalous gas structures outside the main galactic disk.
Abstract Copyright:
∼
Journal keyword(s):
galaxies: individual (NGC 2403, IC 2574, Holmberg II) - ISM: structure - techniques: image processing
Simbad objects:
4
Full paper
View the references in ADS
To bookmark this query, right click on this link: simbad:2008AJ....136.2897R and select 'bookmark this link' or equivalent in the popup menu