2011MNRAS.411.1395L

Query : 2011MNRAS.411.1395L

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):

In this paper we present an analysis of the physical and chemical conditions of the planetary nebula NGC 40 through spatially resolved spectroscopic maps. We also introduce a new algorithm -2D_NEB- based on the well-established IRAF nebular package, which was developed to enable the use of the spectroscopic maps to easily estimate the astrophysical quantities of ionized nebulae. The 2D_NEB was benchmarked, and we clearly show that it works properly, since it compares nicely with the IRAF nebular software.

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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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NGC 40 PN 00 13 01.0170097248 +72 31 19.033338720   11.63 11.46     [WC8] 632 2
2 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0
3 NGC 2022 PN 05 42 06.1904253312 +09 05 10.585995576   14.9 14.2     [WC] 371 1
4 PN Mz 1 PN 15 34 16.6410983544 -59 09 08.105422716   12.8 13.10     ~ 124 0
5 NGC 6369 PN 17 29 20.4566510904 -23 45 34.771819248   16.6 12.00     [WC4] 335 0
6 PN Hb 5 PN 17 47 56.20 -29 59 39.6   10.50 10.78     ~ 274 0
7 NGC 6543 PN 17 58 33.4039587288 +66 37 58.750734000   11.09 11.28     [WC] 1197 2
8 NGC 6781 PN 19 18 28.085 +06 32 19.29           ~ 271 1
9 NGC 6826 PN 19 44 48.1500225888 +50 31 30.249034932   9.779 9.359 10.775   O3f(H) 736 0
10 PN K 4-55 PN 20 45 10.021 +44 39 14.58   16.0 16.5     ~ 47 0
11 NGC 7009 PN 21 04 10.8155187648 -11 21 48.580157556   12.48 12.07     ~ 1020 1

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