1995A&A...302..317F

Query : 1995A&A...302..317F

1995A&A...302..317F - Astronomy and Astrophysics, volume 302317-326 (1995/10-2)

Are compact steep-spectrum sources young?

FANTI C., FANTI R., DALLACASA D., SCHILIZZI R.T., SPENCER R.E. and STANGHELLINI C.

Abstract (from CDS):

Compact Steep-spectrum Sources form a remarkable class of radio sources accounting for a substantial fraction of the extragalactic objects selected at radio frequencies. In this paper we discuss the possibility that the majority of them are Young Sources. We argue that, unless the physical properties of the external medium are much more abnormal than we expect, these objects are likely to have ages of typically 106 years and are the precursors of larger size radio sources. We also argue that their luminosity must decrease by a factor ∼10, as they evolve to extended radio sources and as their sizes grow from a few kpc up to hundreds of kpc.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - quasars: general - galaxies: evolution - radio continuum: galaxies

Simbad objects: 39

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Number of rows : 39
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 3C 43 QSO 01 29 59.7696120312 +23 38 20.041393524           ~ 203 1
2 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2924 2
3 3C 49 rG 01 41 09.161 +13 53 28.07   22.327 20.920 20.876   ~ 189 1
4 7C 022118.10+273638.00 Sy1 02 24 12.2865158736 +27 50 11.538285648   19.502 18 18.263   ~ 210 1
5 4C 34.07 QSO 02 26 10.33325265 +34 21 30.2874853   21.3       ~ 99 1
6 ICRF J031857.8+162832 Sy2 03 18 57.80304294 +16 28 32.6782325     22.0     ~ 212 1
7 QSO B0319+12 QSO 03 21 53.10350560 +12 21 13.9537765   19 19     ~ 137 1
8 3C 93.1 BLL 03 48 46.9073426592 +33 53 15.461439576   20.723   19.110   ~ 133 1
9 4C 76.03 rG 04 10 45.61079426 +76 56 45.3130641   21 22.0 21.200   ~ 164 1
10 PKS 0428+205 rG 04 31 03.76141386 +20 37 34.2648470   22.174   19.085   ~ 198 1
11 2C 396 QSO 04 32 36.50262174 +41 38 28.4497778     20.0     ~ 231 1
12 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
13 ICRF J052109.8+163822 Sy1 05 21 09.88596258 +16 38 22.0515459   19.37 18.84 18.480   ~ 910 1
14 ICRF J054236.1+495107 Sy1 05 42 36.13789710 +49 51 07.2337139   18.45 17.80 17.210   ~ 1573 1
15 3C 186 QSO 07 44 17.4720658920 +37 53 17.250697320   17.5 18.14 17.2   ~ 339 1
16 3C 190 QSO 08 01 33.5525166480 +14 14 42.813906612   21.07 20.26 18.972   ~ 249 2
17 3C 237.0 rG 10 08 00.0529 +07 30 16.830   21       ~ 197 1
18 3C 241 rG 10 21 54.533 +21 59 30.50   23.5       ~ 171 1
19 4C 31.38 Sy2 11 56 18.7420683840 +31 28 04.676598588   19.33 18.96     ~ 141 1
20 3C 268.3 Sy2 12 06 24.70656 +64 13 36.8760 22.74 21.847 20.790 19.910   ~ 196 1
21 6C 122535+365318 QSO 12 27 58.72552577 +36 35 11.8265176   21.5 21.5     ~ 139 1
22 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
23 2E 2879 Sy1 12 52 26.3561235816 +56 34 19.573734864   18.42 18.11 17.660   ~ 293 2
24 4C 32.44 QSO 13 26 16.5142 +31 54 09.522   21.367 19.822 18.882   ~ 181 1
25 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
26 ICRF J140028.6+621038 Sy2 14 00 28.64823540 +62 10 38.5885744   22.137 20.373 19.530   ~ 187 1
27 3C 298.0 Bla 14 19 08.1802187928 +06 28 34.802854680   17.12 16.79     ~ 422 1
28 8C 1443+773 Sy2 14 43 14.5707907691 +77 07 27.607161183   19   18.730   ~ 152 1
29 3C 305.1 rG 14 47 09.15 +76 56 22.2   21.37       ~ 96 1
30 3C 309.1 Bla 14 59 07.58390804 +71 40 19.8668093   17.24 16.78 17.2   ~ 509 1
31 3C 318.0 QSO 15 20 05.4773966208 +20 16 05.471959692   21.93 20.9     ~ 197 1
32 ICRF J160913.3+264129 Sy2 16 09 13.3196 +26 41 29.042   19       ~ 249 1
33 ICRF J163828.2+623444 Sy2 16 38 28.22535940 +62 34 44.3168151   20.7 20.7     ~ 167 2
34 ICRF J183114.8+290710 Sy2 18 31 14.85954059 +29 07 10.2942036   21.917 20.2 20.200   ~ 78 1
35 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
36 3C 454.1 rG 22 50 32.934 +71 29 19.26   22       ~ 79 1
37 3C 454.0 QSO 22 51 34.7277468096 +18 48 40.087264428   18.52 18.4     ~ 232 2
38 3C 455.0 QSO 22 55 03.8909253126 +13 13 33.940584742   19.535 19.590 19.190   ~ 197 1
39 ICRF J234403.7+822640 Sy2 23 44 03.8302221504 +82 26 40.345410408   21.769 20.5 20.220   ~ 104 1

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