2015A&A...576A.136M


C.D.S. - SIMBAD4 rel 1.7 - 2019.08.18CEST07:40:53

2015A&A...576A.136M - Astronomy and Astrophysics, volume 576A, 136-136 (2015/4-1)

The structure of solar radio noise storms.

MERCIER C., SUBRAMANIAN P., CHAMBE G. and JANARDHAN P.

Abstract (from CDS):

The Nancay Radioheliograph (NRH) routinely produces snapshot images of the full sun (field of view ∼3R) at 6 or 10 frequencies between 150 and 450MHz, with typical resolution 3-arcmin and time cadence 0.2s. Combining visibilities from the NRH and from the Giant Meterwave Radio Telescope (GMRT) allows us to produce images of the sun at 236 or 327MHz, with the same field as the NRH, a resolution as low as 20-arcsec, and a time cadence 2s. We seek to investigate the structure of noise storms (the most common non-thermal solar radio emission) which is yet poorly known. We focus on the relation of position and altitude of noise storms with the observing frequency and on the lower limit of their sizes. We use an improved version of a previously used method for combining NRH and GMRT visibilities to get high-resolution composite images and to investigate the fine structure of noise storms. We also use the NRH data over several consecutive days around the common observation days to derive the altitude of storms at different frequencies. We present results for noise storms on four days. Noise storms consist of an extended halo and of one or several compact cores with relative intensity changing over a few seconds. We found that core sizes can be almost stable over one hour, with a minimum in the range 31-35-arcsec (less than previously reported). The heliocentric distances of noise storms are ∼1.20 and 1.35R at 432 and 150MHz, respectively. Regions where storms originate are thus much denser than the ambient corona and their vertical extent is found to be less than expected from hydrostatic equilibrium. The smallest observed sizes impose upper limits on broadening effects due to scattering on density inhomogeneities in the low and medium corona and constrain the level of density turbulence in the solar corona. It is possible that scatter broadening has been overestimated in the past, and that the observed sizes cannot only be attributed to scattering. The vertical structure of the noise storms is difficult to reconcile with the classical columnar model.

Abstract Copyright:

Journal keyword(s): Sun: radio radiation - Sun: corona - Sun: activity

Simbad objects: 202

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Number of rows : 202

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 IC 5376 LIN 00 01 19.770 +34 31 32.68   15.0       ~ 46 0
2 UGC 5 AGN 00 03 05.6525922410 -01 54 49.915893585   13.92 13.32 12.40 12.08 ~ 83 0
3 NGC 7819 GiG 00 04 24.495 +31 28 19.30   14.3       ~ 100 0
4 IC 1528 EmG 00 05 05.365 -07 05 36.32   13.5   13.5 13.2 ~ 39 0
5 UGC 36 G 00 05 13.8793403191 +06 46 19.205724170   14.7       ~ 49 0
6 NGC 1 GiP 00 07 15.8554856380 +27 42 29.024562244   13.4       ~ 92 0
7 NGC 36 LIN 00 11 22.2986137597 +06 23 21.626914171   14.5       ~ 69 0
8 MCG-02-02-030 LIN 00 30 07.308 -11 06 49.19   13   12.65   ~ 42 0
9 UGC 312 AGN 00 31 23.840 +08 28 01.32   14.6   13.10   ~ 83 0
10 UGC 335 S LIN 00 33 57.3224310483 +07 16 05.794678895   15       ~ 21 0
11 NGC 169 SyG 00 36 51.611 +23 59 27.37   13.70 13.1     ~ 102 0
12 NGC 175 G 00 37 21.521 -19 56 03.29   12.95   11.73 12.4 ~ 79 0
13 NGC 180 GiG 00 37 57.692 +08 38 06.80   14.3       ~ 81 0
14 NGC 192 rG 00 39 13.391 +00 51 50.89   13.9   11.97   ~ 107 0
15 NGC 216 EmG 00 41 26.885 -21 02 52.90   13.52 13.12 12.64 13.3 ~ 61 0
16 NGC 237 AGN 00 43 27.881 -00 07 29.52   13.65 13.06 12.53 11.85 ~ 123 0
17 IC 1652 GiG 01 14 56.247 +31 56 54.61   14.3       ~ 38 0
18 NGC 444 GiC 01 15 49.584 +31 04 48.83   14.7       ~ 81 0
19 UGC 809 GiG 01 15 51.851 +33 48 38.83   14.8       ~ 52 0
20 UGC 841 GiG 01 19 10.008 +33 01 50.00   15.0       ~ 54 0
21 NGC 477 Sy2 01 21 20.3413342481 +40 29 17.410487515   14.0       ~ 79 0
22 IC 1683 GiG 01 22 38.867 +34 26 13.21   14.2       ~ 66 0
23 NGC 499 LIN 01 23 11.501 +33 27 36.73   13.0 12.3     ~ 140 0
24 NGC 496 GiG 01 23 11.618 +33 31 45.29   14.3       ~ 87 0
25 NGC 528 GiG 01 25 33.5744748706 +33 40 17.076815410   13.7       ~ 56 0
26 UGC 1057 G 01 28 53.433 +13 47 33.26   14.64       ~ 44 1
27 NGC 774 LIN 01 59 34.7356271470 +14 00 29.558316999   13.97       ~ 56 1
28 NGC 776 GiG 01 59 54.5184600919 +23 38 39.437944570   13.4       ~ 96 0
29 NGC 810 LIN 02 05 28.563 +13 15 05.88   15.4       ~ 29 1
30 NGC 825 GiP 02 08 32.3318412051 +06 19 24.976423165   14.5       ~ 51 0
31 UGC 1938 G 02 28 22.152 +23 12 52.87   15.0       ~ 43 0
32 NGC 1056 Sy2 02 42 48.287 +28 34 27.36   13.5       ~ 138 0
33 UGC 2222 GiP 02 45 09.6772694971 +32 59 23.004798306   14.9 13.68     ~ 32 0
34 Mrk 1052 G 02 45 27.559 +00 54 51.62   14.8       ~ 32 0
35 NVSS J025557+004132 rG 02 55 57.283 +00 41 33.13   14.9       ~ 67 0
36 NGC 1349 LIN 03 31 27.543 +04 22 51.13   15.00       ~ 54 0
37 NGC 1542 GiG 04 17 14.1547834276 +04 46 53.970108495   15.020 13.886 13.228 12.363 ~ 49 0
38 UGC 3107 GiG 04 37 21.821 +09 32 40.00   16.5       ~ 27 0
39 NGC 1645 LIN 04 44 06.3955225941 -05 27 56.423998281   14   12.57   ~ 44 0
40 IC 2095 G 04 48 45.880 -05 07 28.66   16.18   15.31   ~ 15 0
41 UGC 3253 G 05 19 41.625 +84 03 09.10   13.1       ~ 54 0
42 NGC 2253 G 06 43 14.6852097640 +65 40 38.949836611   15.0       ~ 39 0
43 UGC 3539 GiG 06 48 54.054 +66 15 40.90   15.4       ~ 44 0
44 NGC 2347 LIN 07 16 04.087 +64 42 41.54   13.2       ~ 99 0
45 UGC 3899 G 07 32 37.754 +35 36 52.78   15.40       ~ 35 0
46 NGC 2410 AGN 07 35 02.258 +32 49 19.77   17.01 16.26     ~ 63 0
47 UGC 3969 G 07 41 14.334 +27 36 50.85   15.4       ~ 36 0
48 UGC 3995 B Sy2 07 44 09.1273365439 +29 14 50.790387587   13.28       ~ 97 1
49 NGC 2449 LIN 07 47 20.2949490006 +26 55 48.591065899   14.3       ~ 49 0
50 NVSS J075913+325454 rG 07 59 13.077 +32 54 53.30   13.5       ~ 73 1
51 UGC 4722 G 09 00 24.1399915507 +25 36 53.306144385   15.20       ~ 63 0
52 NGC 2730 rG 09 02 15.839 +16 50 17.51   13.7       ~ 51 0
53 NGC 2880 GiG 09 29 34.618 +62 29 26.23   12.6       ~ 130 0
54 IC 2487 EmG 09 30 09.188 +20 05 27.29   14.20       ~ 59 0
55 IC 540 Sy2 09 30 10.261 +07 54 09.10   14.8       ~ 44 0
56 NGC 2906 GiG 09 32 06.247 +08 26 30.86   13.1       ~ 121 0
57 NGC 2916 Sy2 09 34 57.5939750994 +21 42 18.947459809 12.81 12.74 12.05     ~ 121 1
58 NVSS J093526+294843 rG 09 35 26.2778473524 +29 48 45.574744593   15.0       ~ 43 0
59 UGC 5358 G 09 58 47.212 +11 23 18.28   14.9       ~ 45 0
60 UGC 5359 G 09 58 51.6477796914 +19 12 53.856665856   15.0       ~ 36 0
61 UGC 5396 GiG 10 01 40.466 +10 45 22.91   14.6       ~ 48 0
62 NGC 3106 LIN 10 04 05.2521409689 +31 11 07.659449395   14.0       ~ 72 0
63 UGC 5498 LIN 10 12 03.664 +23 05 07.58   15.3       ~ 27 0
64 NGC 3160 Sy2 10 13 55.027 +38 50 34.70   15.2       ~ 47 0
65 UGC 5598 G 10 22 14.000 +20 35 21.57   15.5       ~ 35 0
66 NGC 3303 LIN 10 37 00.091 +18 08 08.81   14.5       ~ 59 0
67 UGC 5771 LIN 10 37 19.3428170172 +43 35 15.295598798   14.6       ~ 50 1
68 NGC 3381 GiG 10 48 24.7993628769 +34 42 41.084421593   12.8       ~ 120 0
69 UGC 6036 LIN 10 55 55.2563271579 +36 51 41.512433039   14.6       ~ 37 0
70 IC 674 LIN 11 11 06.339 +43 37 58.77   14.5       ~ 43 0
71 NGC 3614 GiG 11 18 21.394 +45 44 53.85   12.7       ~ 102 0
72 NGC 3811 G 11 41 16.655 +47 41 26.62   13.0       ~ 140 0
73 NGC 3991 EmG 11 57 30.465 +32 20 03.00   13.8       ~ 131 1
74 NGC 3994 LIN 11 57 36.866 +32 16 39.45   13.51 12.87     ~ 157 1
75 NGC 4003 LIN 11 57 59.0231515758 +23 07 29.577965063   14.8       ~ 56 0
76 UGC 7012 rG 12 02 03.164 +29 50 53.11   14.3       ~ 77 0
77 NGC 4149 rG 12 10 32.853 +58 18 13.76   13.9       ~ 40 0
78 NGC 4185 LIN 12 13 22.207 +28 30 39.31   13.5       ~ 83 0
79 NGC 4210 LIN 12 15 15.8479940774 +65 59 07.089820067   13.4       ~ 104 0
80 IC 776 EmG 12 19 03.119 +08 51 22.15   14.9       ~ 116 0
81 NGC 4470 H2G 12 29 37.8070254595 +07 49 27.286182613   12.9       ~ 188 0
82 NGC 4644 GiP 12 42 42.6505379517 +55 08 43.928656893   14.8       ~ 53 0
83 IC 819 AGN 12 46 10.060 +30 43 54.64           ~ 247 1
84 IC 820 AGN 12 46 11.2492024659 +30 43 21.853173446   14.1       ~ 102 1
85 NGC 4874 LIN 12 59 35.709 +27 57 33.80 13.01 13.7 11.40 12.122 11.386 ~ 696 3
86 UGC 8107 LIN 12 59 39.657 +53 20 28.70   15.0       ~ 33 0
87 UGC 8231 LSB 13 08 37.262 +54 04 28.02   14.2       ~ 40 0
88 UGC 8234 GiG 13 08 46.5066023172 +62 16 18.148378960   13.8       ~ 35 0
89 NGC 5000 SBG 13 09 47.454 +28 54 25.07   14.0 13.41     ~ 140 1
90 UGC 8250 GiC 13 10 20.061 +32 28 54.41   15.6       ~ 45 0
91 UGC 8267 EmG 13 11 11.276 +43 43 35.42   15.7       ~ 32 0
92 NGC 5205 LIN 13 30 03.691 +62 30 41.50   13.5       ~ 88 0
93 NGC 5216 GiP 13 32 06.9096470880 +62 42 02.417160507   16.80 16.14     ~ 103 0
94 UGC 8733 EmG 13 48 39.119 +43 24 44.73   14.6       ~ 65 0
95 IC 944 GiP 13 51 30.897 +14 05 31.66   14.7       ~ 51 0
96 UGC 8778 LIN 13 52 06.654 +38 04 01.01   14.8       ~ 41 0
97 UGC 8781 LIN 13 52 22.7404624797 +21 32 21.664987418   14.5       ~ 45 0
98 NGC 5378 LIN 13 56 51.0211624310 +37 47 50.045919156   13.8       ~ 85 0
99 NGC 5394 GiP 13 58 33.6387896049 +37 27 12.752821928   13.7 13.12     ~ 175 1
100 NGC 5406 LIN 14 00 20.1216280902 +38 54 55.505973822   13.1       ~ 93 0
101 NGC 5485 LIN 14 07 11.312 +55 00 05.47 14.34 13.82 12.22     ~ 206 0
102 NVSS J141045+151231 rG 14 10 45.462 +15 12 33.91   14.7       ~ 50 0
103 NGC 5520 GiP 14 12 22.8052932999 +50 20 54.474015371   13.3       ~ 96 0
104 NGC 5614 IG 14 24 07.591 +34 51 32.02   12.6       ~ 114 0
105 NGC 5630 G 14 27 36.581 +41 15 28.14   13.6       ~ 86 0
106 NGC 5682 GiP 14 34 44.963 +48 40 12.93   15.1       ~ 79 0
107 NGC 5720 LIN 14 38 33.2820411698 +50 48 54.897220308   14.7       ~ 55 0
108 UGC 9476 rG 14 41 31.959 +44 30 45.39   13.59 12.95     ~ 71 0
109 NGC 5784 GiG 14 54 16.458 +42 33 27.97   13.7       ~ 56 0
110 UGC 9665 GiP 15 01 32.450 +48 19 11.65   14.9       ~ 69 0
111 NGC 5888 LIN 15 13 07.379 +41 15 52.66   14.3       ~ 56 0
112 NGC 5908 GiG 15 16 43.220 +55 24 33.29   13.5       ~ 141 1
113 NGC 5929 GiP 15 26 06.158 +41 40 14.40   13.0 14.00     ~ 406 0
114 NGC 5930 GiP 15 26 07.9964334517 +41 40 33.691556640   13.0       ~ 407 0
115 UGC 9873 G 15 29 50.621 +42 37 44.39   15.6       ~ 45 0
116 NGC 5947 AGN 15 30 36.5917232336 +42 43 01.769106580   14.8       ~ 54 0
117 UGC 9892 G 15 32 51.958 +41 11 29.53   15.3       ~ 35 0
118 NGC 5966 LIN 15 35 52.1138943239 +39 46 08.035651724   13.9       ~ 58 0
119 IC 4566 LIN 15 36 42.1583596367 +43 32 21.526076876   14.3       ~ 66 0
120 NGC 5987 GiG 15 39 57.382 +58 04 46.37   13.3       ~ 72 0
121 NGC 6004 GiG 15 50 22.694 +18 56 20.77   13.4       ~ 75 0
122 NGC 6020 GiG 15 57 08.119 +22 24 16.37   14.5       ~ 56 0
123 NGC 6021 LIN 15 57 30.678 +15 57 22.37   14.1       ~ 54 0
124 NGC 6032 GiG 16 03 01.124 +20 57 21.50   15.0       ~ 49 0
125 NVSS J160640+300558 rG 16 06 40.221 +30 05 56.43   14.4       ~ 88 0
126 NGC 6063 G 16 07 13.0017702658 +07 58 44.436124734   14.1       ~ 120 0
127 IC 1199 G 16 10 34.347 +10 02 25.50   14.6       ~ 41 0
128 NGC 6081 LIN 16 12 56.850 +09 52 01.63   14.4       ~ 41 0
129 UGC 10331 G 16 17 21.116 +59 19 12.59   14.8       ~ 48 0
130 NGC 6125 G 16 19 11.554 +57 59 02.80   13.0       ~ 82 0
131 NGC 6132 rG 16 23 38.800 +11 47 10.91   14.8       ~ 43 0
132 7C 162329.50+410025.00 Bla 16 25 10.3250969082 +40 53 34.338966990   13.8       ~ 112 1
133 NGC 6154 LIN 16 25 30.498 +49 50 24.47   13.60       ~ 60 1
134 UGC 10380 LIN 16 25 49.9269294299 +16 34 34.088599036   15.5       ~ 36 0
135 NGC 6150 Q? 16 25 50.003 +40 29 19.42   14.9       ~ 49 0
136 NVSS J162646+113448 rG 16 26 46.692 +11 34 48.63   15.0       ~ 54 0
137 UGC 10388 G 16 27 02.966 +16 22 55.94   15.1       ~ 31 0
138 NGC 6173 LIN 16 29 44.917 +40 48 41.80   14.0       ~ 132 0
139 NGC 6168 GiP 16 31 21.477 +20 11 01.38   15.22       ~ 65 0
140 UGC 10650 GiG 17 00 14.581 +23 06 22.83   15.3       ~ 39 2
141 UGC 10693 GiG 17 04 52.969 +41 51 55.75   14.2       ~ 28 0
142 UGC 10695 LIN 17 05 05.603 +43 02 35.67   14.7       ~ 32 0
143 UGC 10710 GiG 17 06 52.5404664782 +43 07 20.026364944   15.2       ~ 54 0
144 NGC 6310 LIN 17 07 57.437 +60 59 24.20   13.8       ~ 42 0
145 NGC 6314 LIN 17 12 38.6893448746 +23 16 12.247289041 16.04 15.56 14.62 14.02 13.33 ~ 83 0
146 NGC 6338 Bla 17 15 23.0 +57 24 40   14.2   8   ~ 131 2
147 UGC 10796 Sy1 17 16 47.644 +61 55 12.41   14.50       ~ 42 1
148 UGC 10811 LIN 17 18 43.674 +58 08 06.58   14.93       ~ 38 1
149 IC 1256 G 17 23 47.322 +26 29 11.45   14.297 13.551 13.022 12.434 ~ 77 0
150 NGC 6394 Sy1 17 30 21.409 +59 38 23.52   15.27       ~ 73 1
151 UGC 10905 LIN 17 34 06.4348342631 +25 20 38.248227609   14.6       ~ 30 0
152 NGC 6411 G 17 35 32.820 +60 48 48.19   13.2       ~ 97 0
153 NGC 6427 GiP 17 43 38.5945388710 +25 29 38.142842609   14.6       ~ 25 0
154 UGC 10972 LIN 17 46 21.877 +26 32 37.36   14.50       ~ 53 0
155 NGC 6478 GiG 17 48 38.3416724987 +51 09 26.205931515   14.1       ~ 56 0
156 NGC 6497 G 17 51 17.9720724479 +59 28 15.131465602   14.3       ~ 41 0
157 NGC 6515 G 17 57 25.1931045882 +50 43 41.229498759   14.3       ~ 28 0
158 UGC 11228 LIN 18 24 46.2651835897 +41 29 33.845435372   14.5       ~ 28 0
159 UGC 11262 G 18 30 35.757 +42 41 34.16   15.5       ~ 30 0
160 NGC 6762 LIN 19 05 37.0822504507 +63 56 02.721676396   14.2       ~ 34 0
161 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2046 2
162 MCG-02-51-004 GiG 20 15 39.895 -13 37 18.84   14   13.23   ~ 35 0
163 NGC 6941 G 20 36 23.4741685623 -04 37 07.443162713   13.3   13.3 12.9 ~ 58 3
164 NGC 6978 LIN 20 52 35.4344586778 -05 42 40.042984053   14.22   12.67   ~ 68 0
165 UGC 11649 LIN 20 55 27.6252477888 -01 13 30.889418751   14.5       ~ 54 0
166 NGC 7025 LIN 21 07 47.329 +16 20 09.09   14.10       ~ 53 0
167 UGC 11717 LIN 21 18 35.376 +19 43 07.15   15.1       ~ 31 0
168 MCG-01-54-016 G 21 25 59.802 -03 48 35.50   15       ~ 46 0
169 UGC 11792 G 21 42 12.79 +05 36 55.1   15.6       ~ 27 0
170 NGC 7194 GiG 22 03 30.937 +12 38 12.41   14.5       ~ 41 0
171 NGC 7236 LIN 22 14 44.989 +13 50 47.43   14.3 14.3     ~ 251 2
172 UGC 11982 G 22 18 52.962 -01 03 31.21   15.70       ~ 38 0
173 UGC 12054 G 22 29 32.461 +07 43 33.66   15.0       ~ 37 0
174 NGC 7311 LIN 22 34 06.760 +05 34 13.11   13.4       ~ 83 0
175 NGC 7321 LIN 22 36 28.0163538572 +21 37 18.376079359   15.4       ~ 77 0
176 NVSS J223829+351946 rG 22 38 29.417 +35 19 46.84   15.0       ~ 88 1
177 UGC 12185 LIN 22 47 25.063 +31 22 24.77   14.8       ~ 48 0
178 UGC 12224 G 22 52 38.291 +06 05 37.21   15.30       ~ 64 0
179 NGC 7436 GiG 22 57 57.547 +26 08 59.97   15.5       ~ 72 1
180 UGC 12274 LIN 22 58 19.563 +26 03 43.11   15.4       ~ 29 0
181 UGC 12308 G 23 01 18.728 +14 20 22.13   15.3       ~ 55 0
182 NGC 7466 AGN 23 02 03.435 +27 03 09.36   15.27 14.42     ~ 77 0
183 NGC 7489 G 23 07 32.6805868048 +22 59 52.984149095   14.3       ~ 69 0
184 NGC 7549 GiG 23 15 17.285 +19 02 29.92   14.1   12.79   ~ 99 0
185 NGC 7563 LIN 23 15 55.950 +13 11 46.63 14.48 13.87 12.81     ~ 55 1
186 NGC 7562 GiP 23 15 57.503 +06 41 14.97   13.0       ~ 151 0
187 NGC 7591 SyG 23 18 16.2683208567 +06 35 09.111064142   13.8       ~ 215 0
188 UGC 12519 GiG 23 20 02.747 +15 57 09.74   14.3       ~ 57 0
189 UGC 12518 GiP 23 20 12.781 +07 55 55.62   15.7       ~ 43 0
190 NGC 7625 IG 23 20 30.132 +17 13 32.16 13.31 13.23 11.98 11.25   ~ 237 0
191 NGC 7631 GiG 23 21 26.675 +08 13 03.41   13.8       ~ 131 0
192 NGC 7653 LIN 23 24 49.3611914459 +15 16 32.141943276   12.06 11.91     ~ 74 1
193 NGC 7671 GiP 23 27 19.329 +12 28 02.60   14.3       ~ 49 0
194 NGC 7683 GiG 23 29 03.809 +11 26 42.37   14.60       ~ 39 0
195 UGC 12688 G 23 35 26.111 +07 19 19.69   14.40       ~ 52 0
196 NGC 7716 G 23 36 31.458 +00 17 50.33   12.9   13.0 12.6 ~ 126 0
197 NGC 7738 LIN 23 44 02.0233516093 +00 30 59.758852365   14.4       ~ 68 0
198 UGC 12816 LSB 23 51 50.647 +03 04 57.89   15.0       ~ 50 0
199 NGC 7783 Sy1 23 54 10.083 +00 22 58.24   14.14   12.43   ~ 60 0
200 UGC 12864 G 23 57 23.994 +30 59 31.79   14.70       ~ 63 0
201 MCG-01-01-012 G 23 59 10.788 -04 11 30.52   14.5       ~ 23 0
202 NGC 7800 LSB 23 59 36.306 +14 48 20.06   13.4       ~ 75 0

    Equat.    Gal    SGal    Ecl

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2019.08.18-07:40:53

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