2019MNRAS.489.3797M

Query : 2019MNRAS.489.3797M

2019MNRAS.489.3797M - Mon. Not. R. Astron. Soc., 489, 3797-3809 (2019/November-1)

The stellar velocity dispersion in nearby spirals: radial profiles and correlations.

MOGOTSI K.M. and ROMEO A.B.

Abstract (from CDS):

The stellar velocity dispersion, σ, is a quantity of crucial importance for spiral galaxies, where it enters fundamental dynamical processes such as gravitational instability and disc heating. Here we analyse a sample of 34 nearby spirals from the Calar Alto Legacy Integral Field Area (CALIFA) spectroscopic survey, deproject the line-of-sight σ to σR, and present reliable radial profiles of σR as well as accurate measurements of <σR> , the radial average of σR over one effective (half-light) radius. We show that there is a trend for σR to increase with decreasing R, that <σR> correlates with stellar mass (M*), and tested correlations with other galaxy properties. The most significant and strongest correlation is the one with M*: <σR>∝M*0.5. This tight scaling relation is applicable to spiral galaxies of type Sa-Sd and stellar mass M* ≃ 109.5-1011.5 M☉. Simple models that relate σR to the stellar surface density and disc scale length roughly reproduce that scaling, but overestimate <σR> significantly.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): instabilities - ISM: kinematics and dynamics - galaxies: ISM - galaxies: kinematics and dynamics - galaxies: star formation - galaxies: structure

Simbad objects: 35

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Number of rows : 35
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 Z 520-33 GiG 01 15 51.851 +33 48 38.83   14.8       ~ 76 0
2 M 77 Sy2 02 42 40.7091669408 -00 00 47.859690204 9.70 9.61 8.87 10.1 9.9 ~ 4897 2
3 Z 362-5 AG? 05 19 41.625 +84 03 09.10   13.1       ~ 82 0
4 NGC 2253 AG? 06 43 14.6846186952 +65 40 38.950679568   15.0       ~ 66 0
5 Z 308-40 GiG 06 48 54.054 +66 15 40.90   15.4       ~ 71 0
6 NGC 2347 LIN 07 16 04.087 +64 42 41.54   13.2       ~ 130 0
7 NGC 2410 Sy2 07 35 02.2553446824 +32 49 19.644162420   17.01 16.26     ~ 102 1
8 Z 177-47 GiG 07 48 18.994 +34 19 55.73   14.6       ~ 75 0
9 IC 480 AG? 07 55 23.229 +26 44 28.04   15.2       ~ 72 0
10 Z 178-14 GiG 07 59 13.0699024344 +32 54 52.934088096   13.5       ~ 114 1
11 IC 2247 Sy2 08 15 59.0673385176 +23 11 58.414421688   15.2       ~ 112 0
12 NGC 2730 G 09 02 15.839 +16 50 17.51   13.7       ~ 89 0
13 IC 2487 EmG 09 30 09.1764265344 +20 05 27.126058596   14.20       ~ 93 0
14 Z 152-31 G 09 35 26.2841238528 +29 48 45.490357944   15.0       ~ 75 0
15 Z 124-16 AG? 10 22 14.000 +20 35 21.57   15.5       ~ 64 0
16 NGC 4644A GiP 12 42 42.6501505728 +55 08 43.928947644   14.8       ~ 85 0
17 NGC 4711 GiC 12 48 45.8623156056 +35 19 57.881064972   14.4       ~ 83 0
18 NGC 5056 AG? 13 16 12.3107192976 +30 57 01.644570360   13.6       ~ 155 0
19 IC 944 GiP 13 51 30.897 +14 05 31.66   14.7       ~ 86 0
20 NGC 5614 GiG 14 24 07.5872943864 +34 51 31.813653924   12.6       ~ 156 1
21 Z 220-55 GiG 14 49 01.2057857040 +42 27 49.903129224   15.3       ~ 77 0
22 NGC 5908 GiG 15 16 43.2078654048 +55 24 33.341168448   13.5       ~ 174 1
23 Z 222-18 EmG 15 29 50.6461688232 +42 37 44.356517652   15.6       ~ 86 0
24 Z 222-24 AG? 15 32 51.958 +41 11 29.53   15.3       ~ 62 0
25 NGC 5980 GiG 15 41 30.4164434016 +15 47 15.745031088   13.3       ~ 111 0
26 Z 275-17 G 15 59 02.761 +51 18 16.24   15.0       ~ 76 0
27 NGC 6060 GiG 16 05 51.9982696320 +21 29 05.766126036   14.3       ~ 114 0
28 Z 167-26 G 16 06 40.18179 +30 05 56.6421   14.4       ~ 126 0
29 Z 80-31 GiG 16 26 46.692 +11 34 48.63   15.0       ~ 88 0
30 NGC 6168 GiP 16 31 21.477 +20 11 01.38   15.22       ~ 99 0
31 NGC 6186 GiG 16 34 25.485 +21 32 27.01   14.2       ~ 109 0
32 Z 225-44 GiG 17 06 52.5409015272 +43 07 20.025272604   15.2       ~ 75 0
33 NGC 6314 LIN 17 12 38.6880420672 +23 16 12.229407012 16.04 15.56 14.62 14.02 13.33 ~ 111 0
34 NGC 6478 GiG 17 48 38.3418843264 +51 09 26.204414436   14.1       ~ 89 1
35 NGC 7738 LIN 23 44 02.0233516093 +00 30 59.758852365   14.4       ~ 112 1

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