2005ApJ...632..253H

Query : 2005ApJ...632..253H

2005ApJ...632..253H - Astrophys. J., 632, 253-265 (2005/October-2)

On the relevance of the Tremaine-Weinberg method applied to an Hα velocity field: pattern speed determination in M100 (NGC 4321).

HERNANDEZ O., WOZNIAK H., CARIGNAN C., AMRAM P., CHEMIN L. and DAIGLE O.

Abstract (from CDS):

The relevance of the Tremaine-Weinberg (TW) method is tested for measuring bar, spiral, and inner structure pattern speeds using a gaseous velocity field. The TW method is applied to various simulated barred galaxies in order to demonstrate its validity in seven different configurations, including star formation and/or dark matter halo. The reliability of the different physical processes involved and of the various observational parameters is also tested. The simulations show that the TW method could be applied to gaseous velocity fields to get a good estimate of the bar pattern speed, under the condition that regions of shocks are avoided and measurements are confined to regions where the gaseous bar is well formed. We successfully apply the TW method to the Hα velocity field of the Virgo Cluster galaxy M100 (NGC 4321) and derive pattern speeds of 55±5 km.s–1/kpc for the nuclear structure, 30±2 km/s/kpc for the bar, and 20±1 km/s/kpc for the spiral pattern, in full agreement with published determinations using the same method or alternative ones.

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Journal keyword(s): Galaxies: Fundamental Parameters - Galaxies: Individual: NGC Number: NGC 4321 - Galaxies: Kinematics and Dynamics - Galaxies: Spiral - Methods: Numerical - Techniques: Interferometric

Simbad objects: 36

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Number of rows : 36
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 157 Sy2 00 34 46.7879913696 -08 23 47.273597952   11.0   10.03 10.7 ~ 366 1
2 NGC 271 Sy1 00 50 41.8642853736 -01 54 37.040416740   13.2       ~ 61 0
3 NGC 936 EmG 02 27 37.462 -01 09 22.61   11.1   9.98 10.7 ~ 374 0
4 NGC 1023 AG? 02 40 24.0133575864 +39 03 47.663392896 10.91 10.35 9.35 7.83   ~ 689 2
5 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
6 NGC 1308 GiG 03 22 28.5393042168 -02 45 25.756786872   15   13.04   ~ 27 0
7 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1987 2
8 NGC 1358 Sy2 03 33 39.6807616872 -05 05 22.213915692   14.10 13.05 11.76   ~ 220 1
9 NGC 1398 GiG 03 38 52.130 -26 20 16.22   10.37   8.90 10.1 ~ 250 0
10 NGC 1440 GiG 03 45 02.9199469080 -18 15 57.720365172   12.48   10.77   ~ 83 0
11 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 1051 2
12 NGC 2273 Sy1 06 50 08.6691789600 +60 50 44.864645136   14.50 13.54     ~ 566 2
13 NGC 2915 AG? 09 26 11.532 -76 37 34.75 13.13 12.93 12.68 11.90 12.8 ~ 371 2
14 NGC 2903 AGN 09 32 10.111 +21 30 02.99 10.44 9.75 9.07 8.68   ~ 1204 3
15 MCG-03-25-029 Sy1 09 53 33.402 -19 34 59.13   13.60   12.41 12.9 ~ 48 0
16 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4725 3
17 NGC 3359 EmG 10 46 36.845 +63 13 25.10 10.83 11.03 10.57     ~ 380 1
18 NGC 3412 GiG 10 50 53.2803559464 +13 24 43.721664876 11.84 11.45 10.54     ~ 248 1
19 M 66 AGN 11 20 15.0 +12 59 29 9.85 9.65 8.92     ~ 1509 4
20 M 109 GiG 11 57 35.9631479640 +53 22 29.006082336   10.94   9.57   ~ 483 0
21 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1963 2
22 NGC 4322 GiC 12 23 01.7282031936 +15 54 20.021975496   14.81 13.94     ~ 94 1
23 NGC 4328 GiG 12 23 20.0385680184 +15 49 13.327474224   14.04       ~ 96 1
24 NGC 4414 GiC 12 26 27.1276893168 +31 13 24.626206488 11.12 10.96 10.12     ~ 593 2
25 NAME Virgo Cluster ClG 12 30 47.8 +12 23 07           ~ 7107 0
26 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
27 NGC 4596 GiP 12 39 55.9544722920 +10 10 34.185047628   12.4       ~ 387 0
28 M 94 SyG 12 50 53.0737971432 +41 07 12.900884628 9.15 8.96 8.24 7.78   ~ 1476 2
29 M 64 SyG 12 56 43.696 +21 40 57.57   9.36 8.52     ~ 1010 2
30 IC 874 AG? 13 19 00.5211544464 -27 37 42.922967196   13.46   12.32 12.53 ~ 57 0
31 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4565 4
32 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2778 2
33 ESO 139-9 AG? 17 36 05.8920781128 -61 53 54.704613804   14.44   13.25   ~ 25 0
34 ESO 281-31 Sy2 18 52 16.6931748600 -47 00 27.413574408   14.42   13.18   ~ 22 0
35 NGC 6946 H2G 20 34 52.332 +60 09 13.24   10.5       ~ 2661 2
36 NGC 7079 GiG 21 32 35.2418074440 -44 04 03.412507188   12.63 11.61 11.08   ~ 128 0

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