1998AJ....116.1163R

Query : 1998AJ....116.1163R

1998AJ....116.1163R - Astron. J., 116, 1163-1168 (1998/September-0)

Lopsidedness in early-type disk galaxies.

RUDNICK G. and RIX H.-W.

Abstract (from CDS):

We quantify the mean asymmetry of 54 face-on, early-type disk galaxies (S0 to Sab) using the amplitude of the m = 1 azimuthal Fourier component of the R-band surface brightness. We find that the median lopsidedness, <A1/A0>, of our sample is 0.11 and that the most lopsided 20% of our galaxies have <A1/A0> ≥ 0.19. Asymmetries in early-type disks appear to be of similar frequency and strength as in late-type disk galaxies. We have observed our early-type disks in a bandpass (R band) in which the light is dominated by stars with ages greater than 109 yr and therefore are seeing azimuthal asymmetries in the stellar mass distribution. The similar degree of lopsidedness seen in disks of very different star formation rates indicates that the lopsidedness in all galactic disks is primarily due to azimuthal mass asymmetries. Hence, 20% of all disk galaxies (regardless of Hubble type) have azimuthal asymmetries, <A1/A0> ≥ 0.19, in their stellar disk mass distribution, confirming lopsidedness as a dynamical phenomenon.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Kinematics and Dynamics - Galaxies: Photometry - Galaxies: Spiral - Galaxies: Structure

Simbad objects: 58

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Number of rows : 58
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 23 AG? 00 09 53.411 +25 55 25.46   12.5       ~ 313 3
2 NGC 828 rG 02 10 09.5469097104 +39 11 25.233638244   13.0       ~ 164 1
3 NGC 2342 H2G 07 09 18.089 +20 38 09.22   12.92 12.15     ~ 119 0
4 NGC 2460 AGN 07 56 52.3308252792 +60 20 57.759748944   12.5       ~ 130 0
5 NGC 2554 Sy2 08 17 53.5033827360 +23 28 19.801114428   13.5       ~ 60 0
6 NGC 2551 GiG 08 24 50.2699218936 +73 24 43.353747900   13.10 12.11     ~ 79 1
7 NGC 2599 Q? 08 32 11.3215409472 +22 33 38.005300296   13.4       ~ 115 1
8 NGC 2681 LIN 08 53 32.7183058512 +51 18 49.159212120 11.40 11.09 10.29     ~ 318 1
9 IC 520 GiG 08 53 42.2471266032 +73 29 27.418716672   11.9       ~ 52 0
10 NGC 2775 AG? 09 10 20.1334093488 +07 02 16.874157048   11.417 10.481 9.920 8.994 ~ 356 0
11 NGC 2782 Sy2 09 14 05.1 +40 06 49 12.29 12.30 11.63     ~ 472 3
12 NGC 2855 EmG 09 21 27.4894926552 -11 54 34.337758068   13.24 12.23 10.77   ~ 92 0
13 NGC 2993 Sy1 09 45 48.325 -14 22 06.02 12.72 13.11 12.64 13.4 13.0 ~ 182 1
14 NGC 3277 Sy2 10 32 55.4484213912 +28 30 42.279280956 12.74 12.50 11.68     ~ 140 1
15 NGC 3415 AG? 10 51 42.5985450864 +43 42 45.465297876   13.2       ~ 53 0
16 NGC 3442 GiG 10 53 08.0999856384 +33 54 37.298426436   13.2       ~ 90 1
17 NGC 3504 LIN 11 03 11.3 +27 58 21   13.48 12.93     ~ 524 2
18 NGC 3611 GiG 11 17 30.2 +04 33 19   12.4       ~ 125 0
19 NGC 3682 GiG 11 27 41.1968165472 +66 35 23.382841812   13.40       ~ 88 0
20 NGC 3720 GiP 11 32 21.5955988704 +00 48 14.526320220   13.7   12.954   ~ 84 0
21 NGC 3732 Sy1 11 34 13.9509804336 -09 50 44.425087728   13.7   12.45 12.8 ~ 52 0
22 NGC 3884 LIN 11 46 12.1809231456 +20 23 29.919085584   13.79 12.88 12.61   ~ 164 0
23 NGC 4245 GiG 12 17 36.7836585312 +29 36 28.898544204   12.4       ~ 179 0
24 NGC 4277 GiP 12 20 03.7187612736 +05 20 28.879841256   15.0       ~ 69 0
25 NGC 4314 LIN 12 22 32.0223000912 +29 53 43.814812200 11.72 11.43 10.58     ~ 479 1
26 NGC 4369 GiG 12 24 36.204 +39 22 58.73   12.3       ~ 189 1
27 NGC 4384 EmG 12 25 12.012 +54 30 22.07   13.5       ~ 125 1
28 NGC 4378 Sy2 12 25 18.1024266072 +04 55 30.485595360   14.51 13.49     ~ 240 0
29 NGC 4415 GiG 12 26 40.4842511880 +08 26 08.595255480   14.2       ~ 112 0
30 NGC 4421 GiG 12 27 02.5337064504 +15 27 41.371676640 12.81 12.47 11.60     ~ 112 1
31 NGC 4454 GiP 12 28 50.7436825224 -01 56 21.072272316 12.95 12.72 11.87     ~ 83 1
32 NGC 4457 LIN 12 28 59.0252479200 +03 34 14.215556928   11.9       ~ 308 0
33 NGC 4464 GiG 12 29 21.2937802368 +08 09 23.807609316   13.5       ~ 232 0
34 NGC 4470 H2G 12 29 37.8066943368 +07 49 27.284422224   12.9       ~ 239 0
35 NGC 4492 GiG 12 30 59.7099543696 +08 04 40.424214828   14.1       ~ 132 0
36 NGC 4566 Sy2 12 36 00.1177774128 +54 13 15.501061812   14.171 13.307 12.774 12.094 ~ 52 0
37 NGC 4580 LIN 12 37 48.3754581432 +05 22 06.630315636   13.1       ~ 220 0
38 NGC 4643 LIN 12 43 20.1435647088 +01 58 41.716062264   11.9       ~ 266 0
39 NGC 4664 GiG 12 45 06.0013449504 +03 03 20.738321784   11.50 10.50     ~ 171 1
40 NGC 4670 AG? 12 45 17.150 +27 07 31.76   12.6 12.90     ~ 259 0
41 NGC 4691 AGN 12 48 13.60 -03 19 57.7 11.59 11.66 11.08 11.8 11.3 ~ 250 1
42 NGC 4761 BiC 12 53 05.6960048016 -09 12 14.579980632   13.79   11.25   ~ 86 1
43 NGC 4765 GiG 12 53 14.6103052812 +04 27 47.472430278   13.0       ~ 120 0
44 NGC 4763 Sy2 12 53 27.1885557744 -17 00 20.084144796   14   12.41   ~ 31 0
45 NGC 4795 GiP 12 55 02.8560769560 +08 03 55.922264208   13.5       ~ 100 0
46 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2709 0
47 NGC 5600 GiG 14 23 49.541 +14 38 19.45   11.9       ~ 94 0
48 NGC 5614 AG? 14 24 07.5872943864 +34 51 31.813653924   12.6       ~ 146 0
49 NGC 5695 Sy2 14 37 22.1349838776 +36 34 04.201272336   14.55 13.60     ~ 201 0
50 NGC 5691 EmG 14 37 53.339 -00 23 55.94   12.9   12.9 12.4 ~ 107 0
51 NGC 5701 GiG 14 39 11.0751915840 +05 21 48.493104264 12.03 11.76 10.88     ~ 240 1
52 NGC 5915 GiP 15 21 33.076 -13 05 30.22   13.1   12.32 12.7 ~ 109 0
53 NGC 5963 EmG 15 33 27.7333715909 +56 33 33.938950529   13.34 13.65     ~ 105 0
54 NGC 6012 AG? 15 54 13.9048137432 +14 36 04.278408300   13.209 12.420 11.870 11.195 ~ 130 0
55 IC 1269 AG? 17 52 05.8922477280 +21 34 08.701638204   14.026 13.218 12.709 12.189 ~ 50 0
56 NGC 6555 AG? 18 07 49.168 +17 36 17.63   12.7       ~ 44 0
57 NGC 6646 GiG 18 29 38.7197655240 +39 51 54.593918460   13.7       ~ 24 0
58 NGC 6962 LIN 20 47 19.0650209136 +00 19 14.912136624 13.38 13.00 12.14     ~ 141 1

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