2000ApJ...544..277F

Query : 2000ApJ...544..277F

2000ApJ...544..277F - Astrophys. J., 544, 277-282 (2000/November-3)

Decreasing density gradients in circumnuclear H II regions of barred galaxies NGC 1022, NGC 1326, and NGC 4314.

FRANCO J., GARCIA-BARRETO J.A. and DE LA FUENTE E.

Abstract (from CDS):

A reanalysis of the radio continuum emission from circumnuclear regions of the barred galaxies NGC 1022, NGC 1326, and NGC 4314 is presented. The spatial distributions of Hα and radio continuum are similar and suggest the existence of several giant H II regions in the circumnuclear zone. The spectral indices of the H II regions, obtained with similar angular resolution and at three different wavelengths, indicate that in all three galaxies α62>-0.1. This result suggests the existence of giant H II regions with decreasing density gradients. The average density stratifications of these H II regions could be approximated by power laws of the form ne∝r–ω, with exponents in the range 1.6<ω<2.4.

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Journal keyword(s): Galaxies: ISM - Galaxies: Spiral - ISM: H II Regions

Nomenclature: Table 1: FGF NGC 1022 N (Nos 1-3), FGF NGC 1326 N (No. 1), FGF NGC 4314 N (Nos 1-3).

Simbad objects: 14

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Number of rows : 14
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 FGF NGC 1022 2 Rad 02 38 19.91 -06 39 20.2           ~ 2 0
2 NVSS J023832-064039 Rad 02 38 32.69 -06 40 39.9           ~ 1 0
3 NGC 1022 GiG 02 38 32.703 -06 40 38.60 12.33 12.09 11.34     ~ 213 1
4 FGF NGC 1022 1 Rad 02 38 41.85 -06 42 18.4           ~ 2 0
5 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1448 3
6 NGC 1326 Sy1 03 23 56.3657298384 -36 27 52.322333040 11.69 11.43 10.54 10.02 10.9 ~ 279 2
7 NAME Coma I Group GrG 12 22 19.4 +29 53 47           ~ 112 0
8 NGC 4314 LIN 12 22 32.0223000912 +29 53 43.814812200 11.72 11.43 10.58     ~ 494 1
9 Caswell OH 035.20-01.74 Mas 19 01 45.2 +01 13 34           ~ 28 0
10 FGF NGC 1326 1 Rad ~ ~           ~ 1 0
11 FGF NGC 4314 3 Rad ~ ~           ~ 1 0
12 FGF NGC 1022 3 Rad ~ ~           ~ 1 0
13 FGF NGC 4314 2 Rad ~ ~           ~ 1 0
14 FGF NGC 4314 1 Rad ~ ~           ~ 1 0

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