2003A&A...400..421D


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.25CET09:07:25

2003A&A...400..421D - Astronomy and Astrophysics, volume 400, 421-428 (2003/3-3)

The nature of arms in spiral galaxies. II. The sample.

DEL RIO M.S. and CEPA J.

Abstract (from CDS):

We present here the results of an imaging study of eight grand-design and two intermediate-arm galaxies, based on CCD observations in U, B, V, R and I. We give grey-scale images, both in individual and in colour indices. Also we present a decomposition into bulge and disc following an iterative method. This provides us with a reasonable estimate of the bulge size and disc scale length, and shows the disc deviation from an exponential law, which can be interpreted as due to the long-term star formation caused by the spiral arms. To evaluate the contribution of the spiral arms to the disc luminosity distribution, with the aid of a mask we have decomposed each image into two parts: arms (which include bulge and nucleus, and eventually bars) and inter-arms (which include the outer disc). In subsequent papers in this series (del Rio & Cepa, 1998A&A...340....1D1998], hereafter Paper III; del Rio & Cepa, 1999A&AS..134..333D, hereafter Paper IV) the data presented here are used to analyse the spiral structure of the galaxies of the sample, using the methods of Beckman & Cepa (1990A&A...229...37B, hereafter Paper I) and the Fourier transform method to find the different symmetry degrees.

Abstract Copyright:

Journal keyword(s): galaxies: spiral - galaxies: structure

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NGC 157 EmG 00 34 46.751 -08 23 47.36   11.0 19.00 10.03 10.7 ~ 326 0
2 NGC 753 GiG 01 57 42.2042404499 +35 54 57.713274642   12.6   11.59   ~ 191 1
3 NGC 894 G 02 21 36.470 -05 31 17.02 12.21 12.26 11.73     ~ 127 2
4 M 100 AGN 12 22 54.9318850854 +15 49 20.294302163 10.04 10.05 9.35     ~ 1670 2
5 NGC 6384 G 17 32 24.302 +07 03 36.97   13.2       ~ 290 0
6 NGC 6764 LIN 19 08 16.348 +50 55 59.14   15.00 14.32     ~ 278 1
7 NGC 6814 Sy1 19 42 40.5857305428 -10 19 25.102133898   15.33 14.21 11.7 11.3 ~ 725 0
8 NGC 6951 Sy2 20 37 14.1181441937 +66 06 20.078027288   11.64 10.65     ~ 499 2
9 NGC 7479 Sy2 23 04 56.668 +12 19 22.36 11.74 11.60 10.85 10.47 9.66 ~ 672 2
10 NGC 7723 GiP 23 38 57.092 -12 57 39.68   11   10.78   ~ 178 0

    Equat.    Gal    SGal    Ecl

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2020.10.25-09:07:25

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