2012ApJS..199...33D

Query : 2012ApJS..199...33D

2012ApJS..199...33D - Astrophys. J., Suppl. Ser., 199, 33 (2012/April-0)

Measurement of galactic logarithmic spiral arm pitch angle using two-dimensional fast Fourier transform decomposition.

DAVIS B.L., BERRIER J.C., SHIELDS D.W., KENNEFICK J., KENNEFICK D., SEIGAR M.S., LACY C.H.S. and PUERARI I.

Abstract (from CDS):

A logarithmic spiral is a prominent feature appearing in a majority of observed galaxies. This feature has long been associated with the traditional Hubble classification scheme, but historical quotes of pitch angle of spiral galaxies have been almost exclusively qualitative. We have developed a methodology, utilizing two-dimensional fast Fourier transformations of images of spiral galaxies, in order to isolate and measure the pitch angles of their spiral arms. Our technique provides a quantitative way to measure this morphological feature. This will allow comparison of spiral galaxy pitch angle to other galactic parameters and test spiral arm genesis theories. In this work, we detail our image processing and analysis of spiral galaxy images and discuss the robustness of our analysis techniques.

Abstract Copyright: ∼

Journal keyword(s): galaxies: fundamental parameters - galaxies: spiral - galaxies: structure

Simbad objects: 70

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Number of rows : 70
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 45 Sy2 00 14 04.0072128696 -23 10 55.132646808 11.92 11.21 10.73 10.58 10.4 ~ 255 1
2 NGC 150 Sy1 00 34 15.4727570592 -27 48 12.824363736   12.04 11.13 10.92 11.7 ~ 194 0
3 NGC 157 Sy2 00 34 46.7879913696 -08 23 47.273597952   11.0 19.00 10.03 10.7 ~ 351 0
4 NGC 210 GiP 00 40 34.9927609368 -13 52 21.999585108   11.8   11.00 11.4 ~ 174 0
5 NGC 289 Sy2 00 52 42.365 -31 12 20.99   11.36 13.44 10.38 11.4 ~ 236 0
6 NGC 578 AG? 01 30 28.548 -22 40 01.96   11.72 10.93 10.63 11.6 ~ 170 0
7 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 5838 1
8 NGC 613 AGN 01 34 18.235 -29 25 06.56   10.77 12.71 9.50 10.6 ~ 410 3
9 NGC 894 Sy2 02 21 36.470 -05 31 17.02 12.21 12.26 11.73     ~ 147 2
10 NGC 908 Sy1 02 23 04.569 -21 14 01.86   11.03 10.18 9.84 10.6 ~ 192 1
11 NGC 1042 EmG 02 40 23.9724818544 -08 26 00.736256616 11.47 11.56 11.02 11.7 11.4 ~ 260 1
12 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1342 3
13 NGC 1187 Sy1 03 02 37.5895048560 -22 52 02.479512648   11.41   10.43 11.2 ~ 218 1
14 NGC 1232 EmG 03 09 45.514 -20 34 45.48   10.67 9.87 9.53 10.2 ~ 289 0
15 NGC 1292 EmG 03 18 14.894 -27 36 37.19   12.75   11.78 12.2 ~ 98 0
16 NGC 1300 Sy2 03 19 41.0462219928 -19 24 40.187565432   11.16 10.42 9.90 10.7 ~ 536 0
17 NGC 1337 Sy1 03 28 05.959 -08 23 19.03   12.53   12.6 12.2 ~ 101 0
18 NGC 1353 EmG 03 32 03.024 -20 49 08.98   12.19 11.35 10.77   ~ 126 0
19 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1802 2
20 NGC 1398 GiG 03 38 52.130 -26 20 16.22   10.37   8.90 10.1 ~ 234 0
21 NGC 1559 GiG 04 17 35.7508602240 -62 47 01.251567384   11.19 10.45 10.11 10.4 ~ 282 1
22 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 912 2
23 NGC 1792 Sy1 05 05 14.4036930408 -37 58 50.064531168   10.68 10.18 9.53 10.4 ~ 234 1
24 NGC 1964 Sy1 05 33 21.66912 -21 56 43.7028 11.79 11.45 10.81 10.42 11.2 ~ 135 2
25 NGC 2082 GiG 05 41 51.0901098120 -64 18 03.828857148   12.79   11.45 11.6 ~ 96 0
26 NGC 2090 GiG 05 47 01.8557074752 -34 15 01.679264784 12.17 11.70 11.20 10.43 11.0 ~ 186 1
27 ESO 121-26 AG? 06 21 38.7213440688 -59 44 23.748469764   12.58   11.54 12.2 ~ 76 0
28 NGC 2280 EmG 06 44 49.0852522224 -27 38 18.562480188   11.13   9.77 11.3 ~ 132 0
29 NGC 2442 LIN 07 36 23.7700545576 -69 31 50.997856332 11.47 11.15 10.42 9.71 10.4 ~ 222 1
30 NGC 2835 EmG 09 17 52.8523921416 -22 21 16.839119700   11.03   10.32 10.9 ~ 240 0
31 NGC 2935 Sy2 09 36 44.8527810504 -21 07 41.560449096   11.84 10.04 10.44 11.6 ~ 132 1
32 NGC 3052 Sy1 09 54 27.9520195512 -18 38 19.782238308   12.93   11.84   ~ 71 0
33 NGC 3054 EmG 09 54 28.5871599144 -25 42 12.369525732   12.27   10.92 11.4 ~ 146 0
34 IC 2522 Sy2 09 55 08.9545569792 -33 08 13.621874136   12.60   11.93 12.3 ~ 78 0
35 IC 2537 GiG 10 03 51.8988682224 -27 34 15.285214344 12.86 12.88 12.09 11.69 12.2 ~ 67 1
36 NGC 3198 EmG 10 19 54.990 +45 32 58.88 10.83 10.87 10.33     ~ 905 1
37 NGC 3223 Sy2 10 21 35.0831008008 -34 16 00.504571368   11.82 10.82 10.35 11.2 ~ 170 0
38 NGC 3261 EmG 10 29 01.4469882912 -44 39 24.795687996   11.91 11.02 11.8 11.5 ~ 81 0
39 NGC 3318 Sy2 10 37 15.5052550728 -41 37 38.912719512   12.71 11.97 11.77 12.4 ~ 98 0
40 NGC 3450 EmG 10 48 03.6294924288 -20 50 56.950376100   12.72   11.34   ~ 52 0
41 NGC 3513 EmG 11 03 46.080 -23 14 43.73   12.16   11.11   ~ 123 0
42 NGC 3783 Sy1 11 39 01.7096819040 -37 44 19.009642992   12.46 13.43 11.33 12.1 ~ 1647 0
43 NGC 3887 Sy2 11 47 04.563 -16 51 16.71   11.4   10.37 10.9 ~ 147 0
44 NGC 3938 GiG 11 52 49.4335936248 +44 07 14.697085116 10.80 10.90 10.38     ~ 533 1
45 NGC 4027 AG? 11 59 30.168 -19 15 54.62   11.71 11.10 10.60 11.5 ~ 244 1
46 NGC 4030 GiP 12 00 23.6102390784 -01 06 00.197099136   11.42   10.3 10.4 ~ 340 1
47 NGC 4050 EmG 12 02 53.9496667536 -16 22 25.059389916   12   11.22   ~ 77 0
48 M 100 AGN 12 22 54.9299993592 +15 49 20.296257960 10.04 10.05 9.35     ~ 1847 2
49 IC 3253 EmG 12 23 45.231 -34 37 19.85   12.81 11.62 11.35 12.1 ~ 63 0
50 NGC 4930 GiG 13 04 05.1962069592 -41 24 41.246852076           ~ 64 0
51 NGC 4939 Sy2 13 04 14.3280524928 -10 20 22.300454724   14.81 13.80 10.92   ~ 309 1
52 NGC 4995 Sy2 13 09 40.6390105944 -07 50 00.223871892   12   10.94   ~ 126 0
53 NGC 5054 Sy1 13 16 58.488 -16 38 05.46   11.3   10.36 10.7 ~ 196 1
54 NGC 5085 GiG 13 20 17.75 -24 26 24.5   11.99 11.12 10.62 11.0 ~ 94 0
55 M 51 Sy2 13 29 52.698 +47 11 42.93   9.26 8.36 8.40   ~ 4330 4
56 NGC 5195 GiP 13 29 59.590 +47 15 58.06 10.76 10.45 9.55 9.31   ~ 778 3
57 M 83 SBG 13 37 00.91920 -29 51 56.7400 8.85 8.11 7.52 7.21   ~ 2573 2
58 NGC 5247 GiG 13 38 03.0183262176 -17 53 02.645511252   10.77   9.96 10.5 ~ 220 0
59 NGC 5483 EmG 14 10 25.0439323920 -43 19 28.682248872   11.86 11.38 10.62 11.4 ~ 77 0
60 NGC 5861 Sy2 15 09 16.09127 -11 19 17.9800   13.34 12.62 11.03 11.5 ~ 167 0
61 IC 4538 GiG 15 21 11.5784710488 -23 39 30.267192780   12.83   11.62   ~ 53 0
62 ESO 582-12 EmG 15 26 08.042 -22 16 57.03   12.6   11.60 12.2 ~ 56 0
63 NGC 5967 EmG 15 48 15.8579746968 -75 40 22.409701140   14.2       ~ 64 0
64 NGC 6215 GiG 16 51 06.811 -58 59 36.46   11.63 11.28 10.25 11.7 ~ 109 0
65 NGC 6221 Sy2 16 52 46.329 -59 13 00.99   10.90 13.45 9.68 10.4 ~ 310 0
66 NGC 6300 Sy2 17 16 59.5418094960 -62 49 13.946588832   10.88 13.08 9.44 10.2 ~ 431 0
67 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 14415 0
68 IC 4831 GiG 19 14 43.8251178096 -62 16 21.348147720   12.81   11.8 12.1 ~ 41 0
69 NGC 7083 Sy2 21 35 44.6351403840 -63 54 10.199544624   11.93 11.04 10.81 11.5 ~ 183 0
70 NGC 7793 GiG 23 57 49.7540045856 -32 35 27.701550744 10.26 9.74 9.28 9.06 9.7 ~ 1107 2

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