1999A&A...345..769M

Query : 1999A&A...345..769M

1999A&A...345..769M - Astronomy and Astrophysics, volume 345, 769-777 (1999/5-3)

Synchrotron spectra and ages of compact steep spectrum radio sources.

MURGIA M., FANTI C., FANTI R., GREGORINI L., KLEIN U., MACK K.-H. and VIGOTTI M.

Abstract (from CDS):

The high-frequency integrated spectra of Compact Steep Spectrum (CSS) sources show breaks with a moderate spectral steepening well fitted by continuous injection synchrotron spectra. In lobe-dominated CSS sources the radiative ages deduced by the synchrotron theory are in the range of up to 105 years, if equipartition magnetic fields are assumed. These radiative ages are well correlated with the source size indicating that the CSS sources are young. In order to maintain the frustration scenario, in which the sources' lifetimes are ≃107 years, their equipartition magnetic field would be systematically decreased by a factor > 20. To complete the sample used in this work, we conducted observations at 230GHz with the IRAM 30-m telescope of those sources which did not have such high-frequency observations up to now.

Abstract Copyright: ∼

Journal keyword(s): radiation mechanisms: non-thermal - radio continuum: galaxies

Simbad objects: 47

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Number of rows : 47
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 3C 43 QSO 01 29 59.7696120312 +23 38 20.041393524           ~ 202 0
2 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2815 2
3 3C 49 rG 01 41 09.2 +13 53 28   22.327 20.920 20.876   ~ 183 1
4 7C 022118.10+273638.00 Sy1 02 24 12.2865158736 +27 50 11.538285648   19.502 18 18.263   ~ 209 1
5 4C 34.07 QSO 02 26 10.33325265 +34 21 30.2874853   21.3       ~ 96 1
6 ICRF J031857.8+162832 AGN 03 18 57.80304294 +16 28 32.6782325     22.0     ~ 207 1
7 3C 93.1 BLL 03 48 46.9073426592 +33 53 15.461439576   20.723   19.110   ~ 131 1
8 ICRF J041045.6+765645 AGN 04 10 45.61079426 +76 56 45.3130641   21 22.0 21.200   ~ 158 1
9 PKS 0428+205 rG 04 31 03.76141386 +20 37 34.2648470   22.174   19.085   ~ 189 1
10 2C 396 QSO 04 32 36.50262174 +41 38 28.4497778     20.0     ~ 222 1
11 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 851 1
12 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1493 1
13 3C 186 QSO 07 44 17.4720658920 +37 53 17.250697320   17.5 18.14 17.2   ~ 324 1
14 3C 190 QSO 08 01 33.5525166480 +14 14 42.813906612   21.07 20.26 18.972   ~ 242 2
15 4C 40.20 Sy2 08 12 53.1122362128 +40 18 59.880992436   21.23 20.31     ~ 64 1
16 4C 46.17 G 08 14 30.2674 +45 56 39.426   19.3       ~ 27 1
17 3C 237.0 rG 10 08 00.0529 +07 30 16.830   21       ~ 190 0
18 3C 241 rG 10 21 54.5 +21 59 30   23.5       ~ 168 0
19 4C 39.32 rG 10 28 44.2728990384 +38 44 36.859285032   18.4       ~ 47 1
20 6C 112856+453123 QSO 11 31 38.9 +45 14 51   20.0       ~ 30 1
21 4C 31.38 Sy2 11 56 18.7420683840 +31 28 04.676598588   19.33 18.96     ~ 138 1
22 6C 115916+393547 G 12 01 49.9663 +39 19 11.038           ~ 22 1
23 3C 268.3 Sy1 12 06 24.70656 +64 13 36.8760   21.847 20.790 19.910   ~ 188 1
24 7C 122515.59+441716.00 Sy2 12 27 41.9944552429 +44 00 41.926757263           ~ 22 1
25 6C 122535+365318 QSO 12 27 58.72552577 +36 35 11.8265176   21.5 21.5     ~ 134 0
26 NVSS J123535+413707 rG 12 35 35.7115 +41 37 07.054           ~ 23 1
27 ICRF J124449.1+404806 Sy1 12 44 49.1889 +40 48 06.150   19.0 19.0     ~ 78 1
28 2E 2879 Sy1 12 52 26.3561235816 +56 34 19.573734864   18.42 18.11 17.660   ~ 287 2
29 4C 32.44 QSO 13 26 16.5142 +31 54 09.522   21.367 19.822 18.882   ~ 171 1
30 7C 132816.2+252436 QSO 13 30 37.6960744824 +25 09 10.983105972   18.31 17.67     ~ 362 1
31 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4341 2
32 4C 43.31 rG 13 52 28.5862 +42 59 24.055           ~ 25 1
33 ICRF J140028.6+621038 Sy2 14 00 28.64823540 +62 10 38.5885744   22.137 20.373 19.530   ~ 177 1
34 3C 298.0 QSO 14 19 08.1802187928 +06 28 34.802854680   17.12 16.79     ~ 407 1
35 8C 1443+773 Sy2 14 43 14.8 +77 07 29   19   18.730   ~ 146 1
36 3C 305.1 rG 14 47 09.5 +76 56 22   21.37       ~ 95 1
37 ICRF J145907.5+714019 Sy1 14 59 07.58390804 +71 40 19.8668093   17.24 16.78 17.2   ~ 493 1
38 3C 318.0 QSO 15 20 05.4773966208 +20 16 05.471959692   21.93 20.9     ~ 193 1
39 ICRF J160913.3+264129 Sy2 16 09 13.3196 +26 41 29.042   19       ~ 237 0
40 ICRF J163433.8+624535 Sy2 16 34 33.80623119 +62 45 35.8960467   21.06 20.61     ~ 215 1
41 ICRF J163828.2+623444 Sy2 16 38 28.22535940 +62 34 44.3168151   20.7 20.7     ~ 163 2
42 4C 39.56 Sy1 18 21 20.8979332560 +39 42 44.862056676   19.598   18.135   ~ 64 1
43 ICRF J183114.8+290710 Sy2 18 31 14.85954059 +29 07 10.2942036   21.917 20.2 20.200   ~ 74 1
44 3C 454.1 rG 22 50 32.9 +71 29 19   22       ~ 78 1
45 BWE 2249+1832 QSO 22 51 34.7277468096 +18 48 40.087264428   18.52 18.4     ~ 226 2
46 3C 455.0 Sy2 22 55 03.8 +13 13 34   19.535 19.590 19.190   ~ 193 2
47 ICRF J234403.7+822640 Sy2 23 44 03.8302221504 +82 26 40.345410408   21.769 20.5 20.220   ~ 97 1

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