2013MNRAS.436.1074S

Query : 2013MNRAS.436.1074S

2013MNRAS.436.1074S - Mon. Not. R. Astron. Soc., 436, 1074-1083 (2013/December-1)

Pitch angle variations in spiral galaxies.

SAVCHENKO S.S. and RESHETNIKOV V.P.

Abstract (from CDS):

We present a detailed photometric study and measurements of spiral arm pitch angles for a sample of 50 non-barred or weakly barred grand-design spiral galaxies selected from Sloan Digital Sky Survey. In order to find pitch angles, we used a new method based on the window Fourier analysis of their images. This method allows us not only to infer the average pitch angle, but to obtain its value as a function of galactocentric radius as well. Our main results are as follows: (1) Spiral arms of most galaxies cannot be described by a single value of the pitch angle. About 2/3 of galaxies demonstrate pitch angle variations exceeding 20 percent. In most galaxies in the sample their pitch angle decreases by increasing the distance from the centre. (2) Pitch angle variations correlate with the properties of galaxies - with the shape of the surface brightness distribution (envelope-type or truncated disc), and with the sign of stellar disc colour gradient. (3) More luminous and bright bulges produce more tightly wound spiral arms, that is in agreement with current models for spiral arms formation.

Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)

Journal keyword(s): methods: data analysis - galaxies: photometry - galaxies: structure

CDS comments: In Table 1 : PGC 1346399 is not identified, it may be a misprint.

Simbad objects: 49

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Number of rows : 49
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 MCG-02-02-038 EmG 00 31 13.2893979888 -10 28 51.603900420   14.0       ~ 48 0
2 NGC 165 GiG 00 36 28.9369366464 -10 06 21.496364280 14.12 13.88 13.08     ~ 67 1
3 NGC 1094 LIN 02 47 27.8297462352 -00 17 06.476054676   13.5       ~ 92 0
4 MCG-01-10-019 EmG 03 40 42.9802407216 -06 24 54.559212624   15   13.26   ~ 64 1
5 Z 177-41 EmG 07 38 36.4958350800 +37 38 00.677716116   14.481 13.889 13.424 12.761 ~ 98 0
6 NGC 2512 GiG 08 03 07.8493645344 +23 23 30.466464180   14.2       ~ 83 1
7 NGC 2543 GiP 08 12 57.955 +36 15 16.23   12.70       ~ 182 1
8 NGC 2558 LIN 08 19 12.7597192584 +20 30 38.643282396   14.6       ~ 108 0
9 Z 263-72 AG? 08 41 32.117 +51 14 46.68   14.88       ~ 19 1
10 Z 34-38 LIN 09 22 17.5981553472 +04 42 29.937888360   14.8       ~ 36 0
11 IC 2490 LIN 09 33 03.6482835240 +29 55 42.032439372   14.7       ~ 30 0
12 Z 183-25 AG? 10 26 49.6362997080 +34 55 13.504744740   15.1       ~ 41 0
13 NGC 3338 SyG 10 42 07.5363224928 +13 44 49.177468104   12.1       ~ 268 0
14 Z 124-57 LIN 10 42 38.1142430880 +23 57 06.661333260   15.2       ~ 33 0
15 Z 213-6 LIN 10 55 33.1238781720 +42 17 59.787023028   15.5       ~ 19 0
16 NGC 3470 LIN 10 58 44.9066426328 +59 30 38.523022668   14.10       ~ 38 1
17 Z 185-9 LIN 11 07 59.0181229104 +35 27 47.720062260   14.9       ~ 27 0
18 NGC 3624 GiG 11 18 50.9854087680 +07 31 16.988432772   14.7       ~ 27 0
19 Z 97-28 GiC 11 37 01.9198370784 +15 34 13.677244284   14.5       ~ 70 0
20 Z 215-16 AG? 12 02 36.5322693144 +41 03 15.138111348   14.4       ~ 47 1
21 NGC 4165 GiP 12 12 11.8004144880 +13 14 47.411409372 14.59 14.38 13.54     ~ 136 2
22 IC 769 GiG 12 12 32.3204996040 +12 07 25.674097152   14.1       ~ 153 0
23 IC 3053 GiC 12 13 51.9278148168 +14 13 22.714430808   15.7       ~ 19 0
24 NGC 4246 LIN 12 17 58.1198003208 +07 11 09.327638508   14.0       ~ 106 0
25 NGC 4284 GiP 12 20 12.6235422144 +58 05 34.522397808   14.7       ~ 50 0
26 IC 3168 GiC 12 20 18.5387911464 +27 55 13.432124388   15.7       ~ 20 0
27 NGC 4305 GiP 12 22 03.6061412616 +12 44 27.305742948   13.8       ~ 126 0
28 IC 3425 GiC 12 29 56.3887599888 +10 36 55.234461060   15.3       ~ 45 0
29 NGC 4653 EmG 12 43 50.9205045168 -00 33 40.575860064   12.6   12.6 12.3 ~ 129 1
30 Z 245-28 LIN 13 12 06.4315728600 +44 40 42.914011044   15.5       ~ 22 0
31 NGC 5149 GiC 13 26 09.17733 +35 56 03.9440   13.8       ~ 84 1
32 IC 900 GiC 13 34 43.0156033056 +09 20 12.798541320   14.3       ~ 68 0
33 Z 271-56 LSB 13 40 39.910 +54 19 58.81   14.4       ~ 73 0
34 IC 959 LIN 13 56 03.4020247896 +13 30 21.062628432   14.4       ~ 47 0
35 NGC 5364 GiP 13 56 12.004 +05 00 52.06   13.2       ~ 273 0
36 NGC 5497 G 14 10 31.6452492048 +38 53 36.672374904   15.1       ~ 25 0
37 Z 74-150 AG? 14 14 52.0339500936 +14 07 33.125676456   14.3       ~ 50 0
38 NGC 5622 AGN 14 26 12.195 +48 33 50.31   14.105 13.440 12.948 12.412 ~ 92 0
39 Z 133-70 EmG 14 28 56.971 +25 33 11.73   15.1       ~ 33 0
40 NGC 5874 GiG 15 07 51.820 +54 45 10.08   14.1       ~ 98 0
41 Z 297-5 LIN 15 11 18.2050819656 +61 07 25.141113048   15.3       ~ 24 0
42 Z 49-35 GiG 15 11 37.3449416832 +05 23 51.219045312   15.0       ~ 40 0
43 Z 135-60 G 15 29 03.8008524000 +25 27 29.543022180   15.1       ~ 41 0
44 IC 4566 LIN 15 36 42.1586294592 +43 32 21.525766872   14.3       ~ 96 0
45 Z 22-28 LIN 15 41 09.8568179424 -01 42 22.294649952   15.2       ~ 32 0
46 NGC 6116 LIN 16 18 54.5975567568 +35 09 14.225751000   15.3       ~ 38 0
47 NGC 6195 SyG 16 36 32.5656632424 +39 01 40.411487460   14.7       ~ 109 0
48 Z 139-16 LIN 16 54 07.3371598392 +23 24 44.608927320   15.7       ~ 22 0
49 IC 5050 EmG 20 45 15.04651 -05 37 21.8873   14.21   13.37   ~ 28 0

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