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2011MNRAS.411.1395L - Mon. Not. R. Astron. Soc., 411, 1395-1408 (2011/February-3)
Physico-chemical spectroscopic mapping of the planetary nebula NGC 40 and the 2D_NEB, a new 2D algorithm to study ionized nebulae.
LEAL-FERREIRA M.L., GONCALVES D.R., MONTEIRO H. and RICHARDS J.W.
Abstract (from CDS):
Using this software, we derive the maps of several physical parameters of NGC 40. From these maps, we conclude that Te[N II] shows only a slight temperature variation from region to region, with its values constrained between ∼8000 and 9500 K. Electron densities, on the other hand, have a much more prominent spatial variation, as Ne[S II] values vary from ∼1000 to 3000/cm3. Maps of the chemical abundances also show significant variations. From the big picture of our work, we strongly suggest that analysis with spatial resolution be mandatory for more complete study of the physical and chemical properties of planetary nebulae.
Abstract Copyright: 2010 The Authors Monthly Notices of the Royal Astronomical Society2010 RAS
Journal keyword(s): methods: data analysis - techniques: spectroscopic - ISM: abundances - planetary nebulae: individual: NGC 40
Simbad objects: 11
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