2007A&A...469..607W


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST03:47:58

2007A&A...469..607W - Astronomy and Astrophysics, volume 469, 607-631 (2007/7-2)

The subpulse modulation properties of pulsars at 92 cm and the frequency dependence of subpulse modulation.

WELTEVREDE P., STAPPERS B.W. and EDWARDS R.T.

Abstract (from CDS):

A large sample of pulsars has been observed to study their subpulse modulation at an observing wavelength (when achievable) of both 21 and 92cm using the Westerbork Synthesis Radio Telescope. In this paper we present the 92-cm data and a comparison is made with the already published 21-cm results. The main goals are to determine what fraction of the pulsars have drifting subpulses, whether those pulsars share some physical properties and to find out if subpulse modulation properties are frequency dependent. We analysed 191 pulsars at 92cm searching for subpulse modulation using fluctuation spectra. The sample of pulsars is as unbiased as possible towards any particular pulsar characteristics. For 15 pulsars drifting subpulses are discovered for the first time and 26 of the new drifters found in the 21-cm data are confirmed. We discovered nulling for 8 sources and 8 pulsars are found to intermittently emit single pulses that have pulse energies similar to giant pulses. Another pulsar was shown to exhibit a subpulse phase step. It is estimated that at least half of the total population of pulsars have drifting subpulses when observations with a high enough signal-to-noise ratio would be available. It could well be that the drifting subpulse mechanism is an intrinsic property of the emission mechanism itself, although for some pulsars it is difficult or impossible to detect. Drifting subpulses are in general found at both frequencies, although the chance of detecting drifting subpulses is possibly slightly higher at 92cm. It appears that the youngest pulsars have the most disordered subpulses and the subpulses become more and more organized into drifting subpulses as the pulsar ages. The modulation indices measured at the two frequencies are clearly correlated, although at 92cm they are on average possibly higher. At 92cm the modulation index appears to be correlated with the characteristic age of the pulsar and the complexity parameters as predicted by three different emission models. The correlations with the modulation indices are argued to be consistent with the picture in which the radio emission can be divided in a drifting subpulse signal plus a quasi-steady signal which becomes, on average, stronger at high observing frequencies. The measured values of P3 at the two frequencies are highly correlated, but there is no evidence for a correlation with other pulsar parameters.

Abstract Copyright:

Journal keyword(s): stars: pulsars: general - radiation mechanisms: non-thermal

VizieR on-line data: <Available at CDS (J/A+A/469/607): table2.dat>

Simbad objects: 191

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Number of rows : 191

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 PSR B0011+47 Psr 00 14 17.75 +47 46 33.4           ~ 51 0
2 PSR B0031-07 Psr 00 34 08.86 -07 21 53.4           ~ 267 0
3 PSR B0037+56 Psr 00 40 32.362 +57 16 24.91           ~ 32 0
4 PSR B0105+65 Psr 01 08 22.64 +66 08 34.0           ~ 64 0
5 PSR B0136+57 Psr 01 39 19.744 +58 14 31.73           ~ 132 0
6 PSR B0138+59 Psr 01 41 39.938 +60 09 32.30           ~ 99 0
7 PSR B0148-06 Psr 01 51 22.701 -06 35 02.80           ~ 79 0
8 PSR B0149-16 Psr 01 52 10.8536 -16 37 52.990           ~ 103 0
9 PSR B0301+19 Psr 03 04 33.115 +19 32 51.40           ~ 197 0
10 PSR B0320+39 Psr 03 23 26.618 +39 44 52.90           ~ 105 0
11 PSR B0329+54 Psr 03 32 59.3462817079 +54 34 45.047901390           ~ 557 1
12 PSR B0355+54 Psr 03 58 53.7165 +54 13 13.727           ~ 379 1
13 PSR B0402+61 Psr 04 06 30.046 +61 38 40.92           ~ 72 0
14 PSR B0410+69 Psr 04 15 55.653 +69 54 09.89           ~ 33 0
15 PSR J0421-03 Psr 04 21 33.56 -03 45 06.7           ~ 12 0
16 PSR B0447-12 Psr 04 50 08.781 -12 48 07.10           ~ 51 0
17 PSR B0450-18 Psr 04 52 34.0979 -17 59 23.450           ~ 162 0
18 PSR B0450+55 Psr 04 54 07.709 +55 43 41.51           ~ 143 0
19 PSR J0459-0210 Psr 04 59 51.941 -02 10 06.60   11.0 10.36     ~ 26 0
20 PSR B0458+46 Psr 05 02 04.561 +46 54 06.09           ~ 74 0
21 PSR J0520-2553 Psr 05 20 36.185 -25 53 12.29           ~ 18 0
22 PSR B0523+11 Psr 05 25 56.4483 +11 15 19.080           ~ 91 0
23 PSR B0525+21 Psr 05 28 52.308 +22 00 01.00           ~ 321 0
24 V* CM Tau Psr 05 34 31.93830 +22 00 52.1758           F 4710 1
25 PSR B0540+23 Psr 05 43 09.65 +23 29 06.1           ~ 219 0
26 PSR B0559-05 Psr 06 01 58.9821 -05 27 50.560           ~ 75 0
27 PSR B0609+37 Psr 06 12 48.6867 +37 21 37.360           ~ 43 0
28 PSR B0611+22 Psr 06 14 17.25 +22 30 37.4           ~ 233 0
29 PSR B0626+24 Psr 06 29 05.728 +24 15 43.30           ~ 88 0
30 PSR B0628-28 Psr 06 30 49.478 -28 34 43.13           ~ 260 0
31 PSR B0643+80 Psr 06 53 15.090 +80 52 00.22           ~ 52 0
32 PSR B0727-18 Psr 07 29 32.351 -18 36 42.75           ~ 71 0
33 PSR B0740-28 Psr 07 42 49.058 -28 22 43.76           ~ 347 0
34 PSR B0751+32 Psr 07 54 40.688 +32 31 56.20           ~ 67 0
35 PSR B0756-15 Psr 07 58 29.0708 -15 28 08.738           ~ 50 0
36 PSR B0809+74 Psr 08 14 59.500 +74 29 05.70           ~ 355 0
37 PSR B0818-13 Psr 08 20 26.3670 -13 50 55.490           ~ 175 0
38 PSR J0823+0159 Psr 08 23 09.788 +01 59 12.56           DA 206 0
39 PSR B0823+26 Psr 08 26 51.4 +26 37 23           ~ 453 1
40 PSR B0834+06 Psr 08 37 05.642 +06 10 14.56           ~ 378 0
41 PSR B0906-17 Psr 09 08 38.1822 -17 39 37.670           ~ 76 0
42 PSR B0919+06 Psr 09 22 14.008 +06 38 22.84           ~ 240 0
43 PSR B0942-13 Psr 09 44 28.9559 -13 54 41.630           ~ 69 0
44 PSR B0950+08 Psr 09 53 09.3 +07 55 36           ~ 678 2
45 PSR B1039-19 Psr 10 41 36.196 -19 42 13.61           ~ 64 0
46 PSR B1112+50 Psr 11 15 38.400 +50 30 12.29           ~ 129 0
47 PSR B1133+16 Psr 11 36 03.180 +15 51 09.62           ~ 593 0
48 PSR B1237+25 Psr 12 39 40.386 +24 53 49.87           ~ 399 0
49 PSR B1254-10 Psr 12 57 04.769 -10 27 05.80           ~ 30 0
50 PSR B1322+83 Psr 13 21 46.180 +83 23 38.92           ~ 53 0
51 PSR B1508+55 Psr 15 09 25.7 +55 31 33           ~ 260 1
52 PSR B1530+27 Psr 15 32 10.364 +27 45 49.40           ~ 94 0
53 PSR B1540-06 Psr 15 43 30.1579 -06 20 45.250           ~ 92 0
54 PSR B1541+09 Psr 15 43 38.815 +09 29 16.50           ~ 175 0
55 PSR B1552-23 Psr 15 55 33.184 -23 41 09.90           ~ 36 0
56 PSR J1603-2531 Psr 16 03 04.893 -25 31 47.35           ~ 18 0
57 PSR B1600-27 Psr 16 03 08.063 -27 13 27.60           ~ 39 0
58 PSR B1604-00 Psr 16 07 12.1034 -00 32 40.830           ~ 197 0
59 PSR B1607-13 Psr 16 10 42.77 -13 22 22.0           ~ 19 0
60 PSR B1612+07 Psr 16 14 40.906 +07 37 31.00           ~ 78 0
61 PSR B1620-09 Psr 16 23 17.676 -09 08 49.20           ~ 41 0
62 PSR B1633+24 Psr 16 35 25.781 +24 18 47.30           ~ 58 0
63 PSR B1642-03 Psr 16 45 02.0414 -03 17 58.320           ~ 315 0
64 PSR J1650-1654 Psr 16 50 27.20 -16 54 40.0           ~ 19 0
65 PSR B1648-17 Psr 16 51 31.75 -17 09 22.0           ~ 41 0
66 PSR J1652+2651 Psr 16 52 03.080 +26 51 39.85           ~ 23 0
67 PSR J1652-2404 Psr 16 52 58.52 -24 03 51.0           ~ 30 0
68 PSR J1654-2707 Psr 16 54 23.62 -27 13 02.0           ~ 11 0
69 PSR B1657-13 Psr 16 59 53.08 -13 05 09.0           ~ 22 0
70 PSR B1700-18 Psr 17 03 51.088 -18 46 15.80           ~ 44 0
71 PSR B1702-19 Psr 17 05 36.099 -19 06 38.60           ~ 139 0
72 PSR B1706-16 Psr 17 09 26.4413 -16 40 57.730           ~ 197 0
73 PSR B1709-15 Psr 17 11 55.059 -15 09 39.70           ~ 20 0
74 PSR B1717-16 Psr 17 20 25.206 -16 33 33.70           ~ 28 0
75 PSR B1717-29 Psr 17 20 34.117 -29 33 16.20           ~ 53 0
76 PSR B1718-02 Psr 17 20 57.269 -02 12 23.90           ~ 45 0
77 PSR B1726-00 Psr 17 28 34.819 -00 07 45.00           ~ 23 0
78 PSR J1732-1930 Psr 17 32 20.02 -19 30 09.0           ~ 7 0
79 PSR B1730-22 Psr 17 33 26.43 -22 28 37.0           ~ 56 0
80 PSR B1732-02 Psr 17 34 45.66 -02 12 39.1           ~ 15 0
81 PSR B1732-07 Psr 17 35 04.9717 -07 24 52.490           ~ 47 0
82 PSR B1737+13 Psr 17 40 07.3455 +13 11 56.690           ~ 144 0
83 PSR B1738-08 Psr 17 41 22.555 -08 40 31.80           ~ 69 0
84 PSR J1744-2335 Psr 17 44 48.47 -23 35 55.0           ~ 7 0
85 PSR B1745-12 Psr 17 48 17.4077 -13 00 52.080           ~ 53 0
86 PSR B1749-28 Psr 17 52 58.6896 -28 06 37.300           ~ 234 0
87 PSR B1753+52 Psr 17 54 22.92 +52 01 12.3           ~ 27 0
88 PSR J1758+3030 Psr 17 58 25.88 +30 30 24.0           ~ 16 0
89 PSR B1756-22 Psr 17 59 24.1569 -22 05 33.000           ~ 46 0
90 PSR J1759-2922 Psr 17 59 48.246 -29 22 07.00           ~ 9 0
91 PSR B1758-03 Psr 18 01 22.660 -03 57 55.00           ~ 35 0
92 PSR B1804-08 Psr 18 07 38.0274 -08 47 43.270           ~ 105 0
93 PSR J1808-0812 Psr 18 08 09.43 -08 13 01.5           ~ 26 0
94 PSR B1811+40 Psr 18 13 13.281 +40 13 39.03           ~ 51 0
95 PSR B1818-04 Psr 18 20 52.607 -04 27 38.12           ~ 186 0
96 PSR B1819-22 Psr 18 22 58.95 -22 56 31.0           ~ 76 0
97 PSR B1821+05 Psr 18 23 30.9731 +05 50 24.310           ~ 108 0
98 PSR J1823-0154 Psr 18 23 52.146 -01 54 04.60           ~ 17 0
99 PSR B1821-19 Psr 18 24 00.4555 -19 45 51.700           ~ 76 0
100 PSR B1822+00 Psr 18 25 15.324 +00 04 19.70           ~ 23 0
101 PSR B1822-09 Psr 18 25 30.554 -09 35 22.10           ~ 299 0
102 PSR B1826-17 Psr 18 29 43.137 -17 51 03.90           ~ 103 0
103 PSR B1831-03 Psr 18 33 41.914 -03 39 04.33           ~ 59 0
104 PSR B1831-04 Psr 18 34 25.602 -04 26 15.84           ~ 77 0
105 PSR J1835-1106 Psr 18 35 18.287 -11 06 15.10           ~ 51 0
106 PSR J1837-0048 Psr 18 37 32.154 -00 45 10.60           ~ 12 0
107 PSR B1839+56 Psr 18 40 44.608 +56 40 55.47           ~ 85 0
108 PSR B1839+09 Psr 18 41 55.959 +09 12 07.35           ~ 100 0
109 PSR B1842+14 Psr 18 44 54.8946 +14 54 14.120           ~ 94 0
110 PSR B1844-04 Psr 18 47 22.8223628893 -04 02 13.030470420           ~ 92 0
111 PSR B1845-19 Psr 18 48 18.03 -19 52 31.0           ~ 65 0
112 PSR B1845-01 Psr 18 48 23.5917 -01 23 58.230           ~ 118 0
113 PSR J1848-1414 Psr 18 48 39.15 -14 14 17.0           ~ 19 0
114 PSR B1846-06 Psr 18 49 06.435 -06 37 06.90           ~ 53 0
115 PSR B1848+12 Psr 18 51 13.215 +12 59 35.29           ~ 31 0
116 PSR J1852-2610 Psr 18 52 59.467 -26 10 12.70           ~ 26 0
117 PSR B1851-14 Psr 18 54 44.292 -14 21 26.40           ~ 32 0
118 PSR B1857-26 Psr 19 00 47.582 -26 00 43.80           ~ 152 0
119 PSR B1859+03 Psr 19 01 31.781 +03 31 05.92           ~ 132 0
120 PSR B1859+01 Psr 19 01 34.288 +01 56 38.22           ~ 28 0
121 PSR J1901-0906 Psr 19 01 53.015 -09 06 10.80           ~ 30 0
122 PSR B1900+05 Psr 19 02 42.620 +05 56 25.92           ~ 71 0
123 PSR B1900+01 Psr 19 03 29.981 +01 35 38.33           ~ 107 0
124 PSR B1900-06 Psr 19 03 37.939 -06 32 21.94           ~ 54 0
125 PSR B1902-01 Psr 19 05 28.3174939285 -00 56 43.316634150   11.6 11.2     ~ 29 0
126 PSR B1905+39 Psr 19 07 34.656 +40 02 05.71           ~ 73 0
127 PSR B1907+00 Psr 19 09 35.257 +00 07 57.77           ~ 65 0
128 PSR B1907+02 Psr 19 09 38.310 +02 54 50.67           ~ 76 0
129 PSR B1907+10 Psr 19 09 48.6221888736 +11 02 02.886247748           ~ 122 0
130 PSR B1907-03 Psr 19 10 29.7139643834 -03 09 54.924544482           ~ 46 0
131 PSR B1910+20 Psr 19 12 43.354 +21 04 33.80           ~ 64 0
132 PSR B1911-04 Psr 19 13 54.1735 -04 40 47.680           ~ 153 0
133 PSR B1913+10 Psr 19 15 29.982 +10 09 43.78           ~ 84 0
134 PSR B1915+09 Psr 19 16 32.3445 +09 51 25.980           ~ 76 0
135 PSR B1914+13 Psr 19 16 58.670 +13 12 50.02           ~ 83 0
136 PSR B1915+13 Psr 19 17 39.7902 +13 53 56.950           ~ 161 0
137 PSR B1917+00 Psr 19 19 50.663 +00 21 39.80           ~ 87 0
138 PSR B1918+19 Psr 19 21 03.799 +19 48 44.70           ~ 83 0
139 PSR B1919+21 Psr 19 21 44.815 +21 53 02.25           ~ 340 0
140 PSR B1920+21 Psr 19 22 53.531 +21 10 41.97           ~ 87 0
141 PSR B1923+04 Psr 19 26 24.470 +04 31 31.60           ~ 58 0
142 PSR B1924+16 Psr 19 26 45.322 +16 48 32.78           ~ 80 0
143 PSR B1930+20 Psr 19 32 08.023 +20 20 46.41           ~ 74 0
144 PSR B1929+10 Psr 19 32 13.79 +10 59 33.2           ~ 682 0
145 PSR B1933+16 Psr 19 35 47.7012077756 +16 16 40.025845719           ~ 266 1
146 PSR B1937-26 Psr 19 41 00.4070 -26 02 05.750           ~ 62 0
147 PSR B1940-12 Psr 19 43 25.481 -12 37 42.40           ~ 47 0
148 PSR J1946-2913 Psr 19 46 51.734 -29 13 47.10           ~ 39 0
149 PSR B1944+17 Psr 19 46 53.044 +18 05 41.24           ~ 208 0
150 PSR B1946+35 Psr 19 48 25.0067 +35 40 11.057           ~ 148 0
151 PSR J1949-2524 Psr 19 49 25.41 -25 24 01.0           ~ 33 0
152 PSR B1952+29 Psr 19 54 22.554 +29 23 17.29           ~ 125 0
153 PSR B1953+50 Psr 19 55 18.7637 +50 59 55.292           ~ 76 0
154 PSR B2000+40 Psr 20 02 44.030 +40 50 53.91           ~ 34 0
155 PSR B2002+31 Psr 20 04 52.286 +31 37 10.01           ~ 122 0
156 PSR J2005-0016 Psr 20 05 43.74 -00 20 21.9           ~ 9 0
157 PSR B2003-08 Psr 20 06 16.367 -08 07 01.90           ~ 65 0
158 PSR B2011+38 Psr 20 13 10.367 +38 45 43.31           ~ 60 0
159 PSR B2016+28 Psr 20 18 03.9004752640 +28 39 54.932845661           ~ 326 0
160 PSR B2020+28 Psr 20 22 37.0671 +28 54 23.104           ~ 277 1
161 PSR B2021+51 Psr 20 22 49.8730 +51 54 50.233           ~ 237 1
162 PSR B2022+50 Psr 20 23 41.9427 +50 37 34.858           ~ 36 0
163 PSR B2027+37 Psr 20 29 23.872 +37 44 08.17           ~ 32 0
164 PSR B2043-04 Psr 20 46 00.157 -04 21 26.00           ~ 57 0
165 PSR B2044+15 Psr 20 46 39.349 +15 40 33.61           ~ 84 0
166 PSR B2045-16 Psr 20 48 35.446 -16 16 43.00           ~ 281 0
167 PSR B2053+36 Psr 20 55 31.3552 +36 30 21.489           ~ 85 0
168 PSR B2053+21 Psr 20 55 39.151 +22 09 27.22           ~ 37 0
169 PSR B2106+44 Psr 21 08 20.482 +44 41 48.87           ~ 60 0
170 PSR B2110+27 Psr 21 13 04.3895 +27 54 02.290           ~ 88 0
171 PSR B2111+46 Psr 21 13 24.2 +46 44 09           ~ 182 1
172 PSR B2113+14 Psr 21 16 13.752 +14 14 21.04           ~ 71 0
173 PSR B2148+63 Psr 21 49 58.59 +63 29 43.5           ~ 77 0
174 PSR B2148+52 Psr 21 50 37.7331 +52 47 49.625           ~ 33 0
175 PSR B2154+40 Psr 21 57 01.840 +40 17 45.89           ~ 126 0
176 PSR B2217+47 Psr 22 19 48.139 +47 54 53.93           ~ 194 0
177 PSR B2223+65 Psr 22 25 52.36 +65 35 33.8           ~ 276 0
178 PSR B2227+61 Psr 22 29 41.834 +62 05 36.02           ~ 37 0
179 PSR J2248-0101 Psr 22 48 26.904 -01 01 48.10           ~ 20 0
180 PSR B2255+58 Psr 22 57 57.744 +59 09 14.83           ~ 81 0
181 PSR J2304+60 Psr 23 02 11.200 +60 28 00.22           ~ 8 0
182 PSR B2303+30 Psr 23 05 58.324 +31 00 01.76           ~ 174 0
183 PSR B2306+55 Psr 23 08 13.822 +55 47 36.03           ~ 60 0
184 PSR B2310+42 Psr 23 13 08.5976 +42 53 12.987           ~ 115 0
185 PSR B2315+21 Psr 23 17 57.828 +21 49 48.03           ~ 81 0
186 PSR B2319+60 Psr 23 21 55.213 +60 24 30.71           ~ 164 0
187 PSR B2324+60 Psr 23 26 58.6970 +61 13 36.468           ~ 60 0
188 PSR B2327-20 Psr 23 30 26.885 -20 05 29.63           ~ 103 0
189 PSR B2334+61 Psr 23 37 05.779 +61 51 01.69           ~ 165 1
190 PSR J2347-0612 Psr 23 46 50.454 -06 09 59.50           ~ 35 0
191 PSR B2351+61 Psr 23 54 04.724 +61 55 46.79           ~ 87 0

    Equat.    Gal    SGal    Ecl

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2019.10.17-03:47:58

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