2018ApJ...869...29Y


Query : 2018ApJ...869...29Y

2018ApJ...869...29Y - Astrophys. J., 869, 29-29 (2018/December-2)

Dependence of the spiral arms pitch angle on wavelength as a test of the density wave theory.

YU S.-Y. and HO L.C.

Abstract (from CDS):

Large-scale galactic shocks, predicted by density wave theory, trigger star formation (SF-arms) downstream from the potential of the oldest stars (P-arms), resulting in a color jump from red to blue across spiral arms in the direction of rotation, while aging of these newly formed young stars induces the opposite but coexisting classic age gradient further downstream from the SF-arms. As the techniques for measuring pitch angle are intensity-weighted, they trace both the SF-arms and P-arms and are not sensitive to the classic age gradient. Consequently, the measured pitch angle of spiral arms should be systematically smaller in bluer bandpasses compared to redder bandpasses. We test these predictions using a comprehensive sample of high-quality optical (BVRI) images of bright, nearby spiral galaxies acquired as part of the Carnegie-Irvine Galaxy Survey, supplemented by Spitzer 3.6 µm data to probe evolved stars and Galaxy Evolution Explorer ultraviolet images to trace recent star formation. We apply one-dimensional and two-dimensional techniques to measure the pitch angle of spiral arms, paying close attention to adopt consistent procedures across the different bandpasses to minimize error and systematic bias. We find that the pitch angle of spiral arms decreases mildly but statistically significantly from the reddest to the bluest bandpass, demonstrating conclusively that young stars trace tighter spiral arms than old stars. Furthermore, the correlation between the pitch angle of blue and red bandpasses is nonlinear, such that the absolute value of pitch angle offset increases with increasing pitch angle. Both effects can be naturally explained in the context of the density wave theory for spiral structure.

Abstract Copyright: © 2018. The American Astronomical Society. All rights reserved.

Journal keyword(s): galaxies: kinematics and dynamics - galaxies: photometry - galaxies: spiral - galaxies: structure

Simbad objects: 113

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Number of rows : 113
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 157 EmG 00 34 46.7879913696 -08 23 47.273597952   11.0 19.00 10.03 10.7 ~ 339 0
2 NGC 210 GiP 00 40 34.9927609368 -13 52 21.999585108   11.8   11.00 11.4 ~ 167 0
3 NGC 255 GiG 00 47 47.309 -11 28 07.31   12.5   11.82 12.6 ~ 91 0
4 NGC 289 AGN 00 52 42.365 -31 12 20.99   11.36 13.44 10.38 11.4 ~ 219 0
5 NGC 578 G 01 30 28.548 -22 40 01.96   11.72 10.93 10.63 11.6 ~ 165 0
6 NGC 782 GiG 01 57 40.3913561808 -57 47 24.604527516   12.63   11.51 12.3 ~ 50 0
7 NGC 894 G 02 21 36.470 -05 31 17.02 12.21 12.26 11.73     ~ 138 2
8 NGC 945 GiG 02 28 37.3043674032 -10 32 20.689650528   12   11.84   ~ 54 0
9 NGC 986 EmG 02 33 34.3087856832 -39 02 42.128176704 11.72 11.74 10.91 10.10 11.3 ~ 177 1
10 NGC 1042 GiP 02 40 23.9724818544 -08 26 00.736256616 11.47 11.56 11.02 11.7 11.4 ~ 242 1
11 NGC 1084 GiG 02 45 59.926 -07 34 43.10 11.22 11.59 10.73 10.55 11.1 ~ 346 2
12 NGC 1097 LIN 02 46 19.059 -30 16 29.68 10.46 9.97 9.48 8.72 9.8 ~ 1256 3
13 NGC 1187 EmG 03 02 37.5895048560 -22 52 02.479512648   11.41   10.43 11.2 ~ 207 1
14 NGC 1179 LSB 03 02 38.42 -18 53 51.4   12.61   11.83 12.2 ~ 93 0
15 NGC 1232 EmG 03 09 45.514 -20 34 45.48   10.67 9.87 9.53 10.2 ~ 278 0
16 NGC 1255 GiG 03 13 31.9885639248 -25 43 30.399262428   11.80   10.66 11.5 ~ 142 0
17 NGC 1309 GiG 03 22 06.5548977432 -15 23 59.791692912   12.08   12.5 11.7 ~ 203 0
18 IC 1954 GiG 03 31 31.393 -51 54 17.54   12.14   11.15 11.8 ~ 112 0
19 NGC 1357 GiG 03 33 17.0545498128 -13 39 50.970066984   12.44   11.8 11.3 ~ 140 0
20 IC 1953 GiG 03 33 41.885 -21 28 43.03   12.41   12.3 12.1 ~ 112 0
21 NGC 1367 GiG 03 35 01.3451198496 -24 55 59.504904516   11.48   9.98 11.1 ~ 184 0
22 NGC 1385 EmG 03 37 28.323 -24 30 04.60 11.28 11.50 10.94 10.45 11.7 ~ 240 2
23 NGC 1436 GiG 03 43 37.0896438888 -35 51 11.004592644   12.49   11.16   ~ 115 0
24 IC 1993 GiG 03 47 04.8369103704 -33 42 35.877997728   12.50   11.16 11.7 ~ 79 0
25 IC 2051 G 03 52 00.7563634728 -83 49 50.582319276   12.32   10.89 11.6 ~ 63 0
26 NGC 1493 GiP 03 57 27.4270810416 -46 12 38.513195316   11.88   11.01 11.6 ~ 123 0
27 NGC 1494 GiG 03 57 42.567 -48 54 40.90   12.34   11.46 12.3 ~ 78 0
28 IC 2056 GiG 04 16 24.5103101928 -60 12 24.417665424   12.49   11.52   ~ 72 0
29 NGC 1559 GiG 04 17 35.7508602240 -62 47 01.251567384   11.19 10.45 10.11 10.4 ~ 254 1
30 NGC 1566 Sy1 04 20 00.3968473248 -54 56 16.624708764 10.29 10.19 9.73 9.21 10.1 ~ 804 2
31 NGC 1637 AGN 04 41 28.1926876152 -02 51 28.667815488   11.4   11.0 11.3 ~ 394 0
32 NGC 1703 GiG 04 52 52.145 -59 44 31.98   12.31   11.43 11.6 ~ 82 0
33 IC 438 GiG 05 53 00.0793932408 -17 52 34.051147932   12.75   11.45 12.2 ~ 67 0
34 NGC 2417 GiG 07 30 12.0818600616 -62 15 09.284120640   13.09   11.88 12.3 ~ 55 0
35 NGC 2525 EmG 08 05 38.0398320744 -11 25 37.363916496   11.8   10.72 11.5 ~ 87 0
36 NGC 2763 EmG 09 06 49.0665690168 -15 29 59.523832824   12.3   11.65 12.2 ~ 92 0
37 NGC 2835 EmG 09 17 52.8523921416 -22 21 16.839119700   11.03   10.32 10.9 ~ 203 0
38 NGC 2889 GiG 09 27 12.5966619648 -11 38 36.579108912   12   11.31   ~ 46 0
39 NGC 2947 GiG 09 36 05.8142235096 -12 26 11.574338748   13.4   13.2 13.1 ~ 28 0
40 NGC 2997 GiG 09 45 38.7542237472 -31 11 27.345810192   9.97 9.41 8.84 9.9 ~ 400 0
41 NGC 3052 EmG 09 54 27.9520195512 -18 38 19.782238308   12.93   11.84   ~ 65 0
42 IC 2537 GiG 10 03 51.8988682224 -27 34 15.285214344 12.86 12.88 12.09 11.69 12.2 ~ 62 1
43 NGC 3124 GiG 10 06 39.9100704816 -19 13 17.646034692   12.84   11.51 12.2 ~ 76 0
44 IC 2560 Sy2 10 16 18.7073057664 -33 33 49.720274676   12.53 13.31 11.25 12.2 ~ 242 0
45 NGC 3223 EmG 10 21 35.0831008008 -34 16 00.504571368   11.82 10.82 10.35 11.2 ~ 165 0
46 NGC 3275 EmG 10 30 51.7808470128 -36 44 13.204971312   12.54   11.12   ~ 56 0
47 NGC 3313 EmG 10 37 25.4644853016 -25 19 09.838240356   12.38   11.13 11.7 ~ 63 0
48 NGC 3450 GiG 10 48 03.6294924288 -20 50 56.950376100   12.72   11.34   ~ 47 0
49 NGC 3513 GiP 11 03 46.080 -23 14 43.73   12.16   11.11   ~ 117 0
50 IC 2627 EmG 11 09 53.3868003696 -23 43 33.192730524   12.67   11.36 11.9 ~ 102 0
51 NGC 3660 Sy2 11 23 32.2781260536 -08 39 30.730097016   15.34 14.45     ~ 168 0
52 NGC 3673 EmG 11 25 12.8553677232 -26 44 12.311232288   12.31   11.00 11.6 ~ 84 0
53 IC 2764 GiG 11 27 05.0229682968 -28 58 48.675905472   13.15   11.77 12.2 ~ 48 0
54 NGC 3887 G 11 47 04.563 -16 51 16.71   11.4   10.37 10.9 ~ 141 0
55 ESO 440-11 G 11 48 45.4 -28 17 35   12.98   12.00 12.1 ~ 60 1
56 NGC 4027 IG 11 59 30.168 -19 15 54.62   11.71 11.10 10.60 11.5 ~ 237 1
57 NGC 4030 GiP 12 00 23.6102390784 -01 06 00.197099136   11.42   10.3 10.4 ~ 312 1
58 NGC 4304 EmG 12 22 12.722 -33 29 03.82   12.41 12.02 11.33 12.0 ~ 67 0
59 NGC 4487 GiG 12 31 04.4731449720 -08 03 14.548820040   11.7   11.9 11.6 ~ 166 0
60 NGC 4504 GiG 12 32 17.4213303288 -07 33 48.904197084   12.1   11.31 12.3 ~ 120 0
61 NGC 4593 Sy1 12 39 39.4435107024 -05 20 39.034988448   13.95 13.15     ~ 1016 0
62 NGC 4653 GiP 12 43 50.9205045168 -00 33 40.575860064   12.6   12.6 12.3 ~ 115 1
63 NGC 4775 GiG 12 53 45.707 -06 37 19.73   12.3   11.19 12.0 ~ 150 0
64 NGC 4899 GiG 13 00 56.6297022552 -13 56 39.019331112   12.9   11.88 12.5 ~ 72 0
65 NGC 4902 GiP 13 00 59.7429437400 -14 30 48.759182748   12.0   10.86 11.4 ~ 143 0
66 NGC 4930 GiG 13 04 05.1962069592 -41 24 41.246852076           ~ 60 0
67 NGC 4939 Sy2 13 04 14.3280524928 -10 20 22.300454724   14.81 13.80 10.92   ~ 286 1
68 NGC 4947 EmG 13 05 20.1999678264 -35 20 14.636548896   12.74 11.89 11.67 12.2 ~ 56 0
69 NGC 4965 EmG 13 07 09.3504711408 -28 13 41.789696088   12.76   11.96 12.7 ~ 66 1
70 NGC 4981 GiG 13 08 48.7426150512 -06 46 38.957361240   12.1   10.91 11.7 ~ 155 0
71 NGC 4995 GiG 13 09 40.6390105944 -07 50 00.223871892   12   10.94   ~ 121 0
72 NGC 5054 GiP 13 16 58.488 -16 38 05.46   11.3   10.36 10.7 ~ 184 1
73 NGC 5068 G 13 18 54.807 -21 02 20.76 11.24 10.53 10.01 9.78 10.1 ~ 250 0
74 NGC 5134 EmG 13 25 18.5250908808 -21 08 03.066281880   12.11   10.77 11.3 ~ 99 0
75 NGC 5135 Sy2 13 25 44.059 -29 50 01.24   12.58 13.35 11.53 12.2 ~ 455 1
76 NGC 5247 GiG 13 38 03.0183262176 -17 53 02.645511252   10.77   9.96 10.5 ~ 211 0
77 NGC 5334 LSB 13 52 54.4632396696 -01 06 52.604999568   12.0   12.3 12.1 ~ 159 0
78 NGC 5339 GiG 13 54 00.2660800368 -07 55 50.387342088   16.5       ~ 74 0
79 ESO 445-89 GiC 14 01 04.032 -30 19 38.12   13.11   12.42 12.8 ~ 44 0
80 NGC 5468 GiP 14 06 34.8905851004 -05 27 10.718829772   12.1   11.58 12.2 ~ 135 0
81 NGC 5556 G 14 20 34.0 -29 14 31   12.43   11.50 11.7 ~ 64 0
82 NGC 5597 GiP 14 24 27.444 -16 45 45.70   14.75 14.18 11.88   ~ 110 0
83 NGC 5861 Sy2 15 09 16.09127 -11 19 17.9800   13.34 12.62 11.03 11.5 ~ 155 0
84 NGC 5892 EmG 15 13 48.1988288712 -15 27 49.558062960   12.0   11.80 12.3 ~ 61 0
85 NGC 5885 EmG 15 15 04.1537304432 -10 05 09.678730812   11.7   16.84 11.9 ~ 66 0
86 IC 4538 GiG 15 21 11.5784710488 -23 39 30.267192780   12.83   11.62   ~ 49 0
87 ESO 582-12 EmG 15 26 08.042 -22 16 57.03   12.6   11.60 12.2 ~ 51 0
88 ESO 9-10 GiG 17 39 31.8155205528 -85 18 37.517491296   12.6   12.3 12.1 ~ 44 0
89 IC 4901 GiG 19 54 23.5602286656 -58 42 48.989845872   12.29   11.02 11.6 ~ 63 0
90 NGC 6902 GiG 20 24 28.0668116304 -43 39 12.416990940 11.73 11.82 10.93 10.59 11.4 ~ 116 1
91 NGC 6923 GiP 20 31 39.0580970808 -30 49 54.787179180   12.80 12.09 11.48 12.1 ~ 84 0
92 NGC 6943 G 20 44 33.6942768168 -68 44 51.556773048   11.87 11.25 10.83 11.5 ~ 68 0
93 NGC 7070 GiG 21 30 25.3891685280 -43 05 13.833104352   12.70 12.29 11.76 12.4 ~ 66 0
94 NGC 7083 GiG 21 35 44.6351403840 -63 54 10.199544624   11.93 11.04 10.81 11.5 ~ 176 0
95 NGC 7098 G 21 44 16.1497974000 -75 06 40.864242528   12.33 11.37 10.84 11.5 ~ 79 0
96 NGC 7140 G 21 52 15.352 -55 34 10.79   12.68 13.49 11.63 12.0 ~ 76 0
97 NGC 7095 GiP 21 52 26.5174422024 -81 31 51.109094280   12.22   11.08 12.4 ~ 62 1
98 IC 5240 G 22 41 52.4120629800 -44 46 01.796119356   12.25 11.31 11.06 12.1 ~ 90 0
99 NGC 7412 GiG 22 55 45.7654890264 -42 38 31.057726956   11.82 11.38 12.0 11.4 ~ 110 0
100 NGC 7418 EmG 22 56 36.1156121952 -37 01 47.845242192   11.66 11.39 10.66 11.3 ~ 157 1
101 NGC 7421 GiG 22 56 54.3533970816 -37 20 50.437978152 12.61 12.64 11.93 11.71 12.1 ~ 115 1
102 NGC 7424 GiG 22 57 18.3924511080 -41 04 14.124670032   10.88 10.38 10.02 10.9 ~ 206 0
103 IC 5273 EmG 22 59 26.719 -37 42 10.36   11.90 11.45 11.07 11.6 ~ 123 0
104 NGC 7496 AGN 23 09 47.2876854912 -43 25 40.279652796   11.92 13.90 10.95 11.5 ~ 248 1
105 NGC 7513 GiG 23 13 14.0669738568 -28 21 27.280137168   12.73   11.40   ~ 80 0
106 NGC 7531 GiG 23 14 48.4576363992 -43 35 59.465701536   11.99 11.26 12.1 11.7 ~ 141 0
107 NGC 7552 GiP 23 16 10.767 -42 35 05.39 11.34 11.22 10.57 10.08 11.1 ~ 529 3
108 IC 5325 GiG 23 28 43.4210245680 -41 19 59.690746920 11.80 11.89 11.27 10.73 11.5 ~ 100 1
109 NGC 7689 G 23 33 16.7762633280 -54 05 39.861808800   12.14   11.31 11.8 ~ 77 0
110 IC 5332 GiG 23 34 27.488 -36 06 03.89 11.59 11.27 10.72 10.50 11.2 ~ 140 0
111 NGC 7723 GiP 23 38 57.092 -12 57 39.68   11   10.78   ~ 185 0
112 NGC 7727 GiP 23 39 53.870 -12 17 34.84   11   10.55   ~ 166 0
113 NGC 7755 EmG 23 47 51.7427496768 -30 31 19.174259172   12.10 11.36 11.11 11.7 ~ 118 0

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2022.07.06-10:01:17

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