1998AJ....116.2154K


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST07:05:51

1998AJ....116.2154K - Astron. J., 116, 2154-2165 (1998/November-0)

A photometric method for quantifying asymmetries in disk galaxies.

KORNREICH D.A., HAYNES M.P. and LOVELACE R.V.E.

Abstract (from CDS):

A photometric method for quantifying deviations from axisymmetry in optical images of disk galaxies is applied to a sample of 32 face-on and nearly face-on spirals. The method involves comparing the relative fluxes contained within trapezoidal sectors arranged symmetrically about the galaxy center of light, excluding the bulge and/or barred regions. Such a method has several advantages over others, especially when quantifying asymmetry in flocculent galaxies. Specifically, the averaging of large regions improves the signal-to-noise in the measurements; the method is not strongly affected by the presence of spiral arms; and it identifies the kinds of asymmetry that are likely to be dynamically important. Application of this ``method of sectors'' to R-band images of 32 disk galaxies indicates that about 30% of spirals show deviations from axisymmetry at the 5 σ level.

Abstract Copyright:

Journal keyword(s): Galaxies: Photometry - Galaxies: Structure - Techniques: Photometric

Simbad objects: 33

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Number of rows : 33

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 UGC 48 G 00 06 37.41 +47 52 37.9   16.0       ~ 12 0
2 NGC 600 EmG 01 33 05.292 -07 18 41.06   13.1   13.0 12.9 ~ 74 0
3 NGC 991 LSB 02 35 32.6834126656 -07 09 15.840635679   12.36   12.7 12.6 ~ 134 1
4 NGC 1042 GiP 02 40 23.9725496856 -08 26 00.749394900 11.47 11.56 11.02 11.7 11.4 ~ 221 1
5 NGC 1058 Sy2 02 43 30.0247243235 +37 20 28.807743477   12.29 11.75 10.85   ~ 434 0
6 NGC 1073 EmG 02 43 40.598 +01 22 33.13   11.3   11.3 11.8 ~ 305 0
7 NGC 1302 GiG 03 19 51.2028576345 -26 03 37.942953768   11.43   9.99 10.8 ~ 134 0
8 NGC 1637 AGN 04 41 28.229 -02 51 28.94   11.4   11.0 11.3 ~ 370 0
9 MCG-03-14-017 LSB 05 28 14.1004881411 -16 07 28.291959196   12.7   12.12 13.1 ~ 25 0
10 UGC 3574 GiP 06 53 10.3946512552 +57 10 40.160074462   13.9       ~ 54 0
11 NGC 2326 rG 07 08 11.0010077403 +50 40 54.842878046   14.3   11.88   ~ 23 0
12 UGC 3685 GiG 07 09 05.9239782981 +61 35 44.052450522   13.1       ~ 45 0
13 UGC 3826 G 07 24 27.898 +61 41 38.16   13.20 12.70 12.25 11.99 ~ 39 0
14 NGC 3450 GiG 10 48 03.618 -20 50 57.27   12.72   11.34   ~ 45 0
15 NGC 3393 Sy2 10 48 23.467 -25 09 43.30   13.10 13.95 11.67 12.2 ~ 346 3
16 NGC 3596 H2G 11 15 06.2072163849 +14 47 13.281853556   12.01 11.49 10.99 10.45 ~ 168 0
17 NGC 3631 IG 11 21 02.944 +53 10 09.95   11.0       ~ 323 1
18 NGC 3642 LIN 11 22 18.014 +59 04 27.27   14.86 14.04     ~ 187 0
19 UGC 6429 GiG 11 25 19.047 +63 43 45.41   14.1       ~ 45 0
20 NGC 3913 G 11 50 38.928 +55 21 13.92   14.2       ~ 135 0
21 NGC 4136 GiG 12 09 17.7041181303 +29 55 39.417540586   11.69       ~ 196 1
22 NAME LOCAL SUPERCL SCG 12 31 +12.4           ~ 452 0
23 NGC 4688 GiP 12 47 46.5238842013 +04 20 09.734676195   14.5       ~ 150 1
24 M 101 GiP 14 03 12.583 +54 20 55.50   8.46 7.86 7.76   ~ 2544 2
25 ESO 446-31 EmG 14 13 30.1307432005 -29 35 40.389806463   13.65   12.63 12.8 ~ 30 0
26 NGC 5701 GiG 14 39 11.0762411300 +05 21 48.498854025 12.03 11.76 10.88     ~ 221 1
27 NGC 5957 Sy2 15 35 23.2168976437 +12 02 51.288968758   13.3       ~ 110 0
28 UGC 10020 G 15 45 44.491 +20 33 38.51   14.5       ~ 40 0
29 NGC 7217 LIN 22 07 52.368 +31 21 33.32   12.94 11.92     ~ 462 0
30 UGCA 428 GiP 22 24 11.551 -03 28 58.41   14.5       ~ 28 0
31 MCG-01-60-011 GiG 23 36 29.8655772732 -04 54 31.264910330   13.8   13.5 13.3 ~ 18 0
32 UGC 12732 GiP 23 40 39.96 +26 14 09.8   14.5       ~ 116 0
33 NGC 7742 GiP 23 44 15.7546655695 +10 46 01.536389590   12.5       ~ 197 0

    Equat.    Gal    SGal    Ecl

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2020.07.05-07:05:51

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