2005BaltA..14..413K

Query : 2005BaltA..14..413K

2005BaltA..14..413K - Baltic Astronomy, 14, 413-416 (2005/October-0)

"TEMPORARY GPS/HFP" radio sources.

KOVALEV Y.Y.

Abstract (from CDS):

For investigation of the nature of GPS/HFP (`gigahertz peaked-spectrum/ high-frequency peakers', possible young developing radio sources) it is important to construct robust, representative flux-density-limited samples. To look for spectra of the GPS/HFP type, we have used our RATAN-600 instantaneous broad-band 1-22 GHz spectra measurements of about 2000 compact extragalactic radio sources done in 1997-2003. We have found that some objects from published GPS/HFP samples change their spectra in time becoming non-GPS/HFP sources. We call such objects ``temporary GPS/HFP'' and suggest to use them cautiously. GPS/HFP-like type of spectrum can often be produced by an AGN during early stages of strong radio flares, and usually such a spectrum evolves to a flat one. A GPS-type spectrum could also be observed during a quiescent state of a relativistic jet when emission of an extended, slowly variable component of the source dominates. Some new GPS candidates are also found.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active, compact - radio continuum: galaxies

Simbad objects: 19

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Number of rows : 19
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 QSO J0217+0144 Bla 02 17 48.95475095 +01 44 49.6990271   16.74 16.09 18.51 13.29 ~ 455 1
2 [VV96] J031049.8+381453 BLL 03 10 49.87992240 +38 14 53.8378761     19.70 19.21   ~ 127 1
3 ICRF J032915.3+351005 BLL 03 29 15.3548503584 +35 10 05.989666620       17.60   ~ 51 1
4 QSO J0357+2319 QSO 03 57 21.60989042 +23 19 53.8251826       18.78   ~ 50 1
5 PMN J0519+0848 Rad 05 19 10.81113186 +08 48 56.7346356           ~ 27 1
6 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
7 QSO J1016+0513 Bla 10 16 03.13647602 +05 13 02.3413146   20.26 19.83 20   ~ 162 1
8 ICRF J135938.0+401138 Bla 13 59 38.09426177 +40 11 38.2506777     19.2 17.00   ~ 69 1
9 ICRF J145738.1+074954 Bla 14 57 38.12869548 +07 49 54.7150624   21.26 20.74 19.37   ~ 47 1
10 QSO J1505+0326 Bla 15 05 06.47716039 +03 26 30.8125704   19.02 18.62 17.72   ~ 278 1
11 [VV98] J200617.7+642445 Bla 20 06 17.69453821 +64 24 45.4180077     19.00 20.13   ~ 61 1
12 QSO B2059+034 Bla 21 01 38.83415344 +03 41 31.3207714   18.13 17.78 17.68   ~ 176 1
13 QSO J2123+0535 Bla 21 23 44.51739933 +05 35 22.0930238   18.3 20.40 19.86   ~ 320 1
14 ICRF J220752.8+165217 Bla 22 07 52.86567746 +16 52 17.8154293   19.5 19.5 19.98   ~ 49 1
15 QSO J2225+2118 Bla 22 25 38.0470440264 +21 18 06.414418332     18.19 17.65   ~ 180 1
16 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
17 QSO B2253+417 QSO 22 55 36.70783988 +42 02 52.5326109     18.8     ~ 82 1
18 QSO J2320+0513 QSO 23 20 44.85659166 +05 13 49.9526016   18.6 19.0     ~ 166 1
19 QSO B2327+335 Bla 23 30 13.73765966 +33 48 36.4714906     18.5 18.71   ~ 53 1

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