2009A&A...494..527H

Query : 2009A&A...494..527H

2009A&A...494..527H - Astronomy and Astrophysics, volume 494, 527-537 (2009/2-1)

Doppler factors, Lorentz factors and viewing angles for quasars, BL Lacertae objects and radio galaxies.

HOVATTA T., VALTAOJA E., TORNIKOSKI M. and LAEHTEENMAEKI A.

Abstract (from CDS):

We have calculated variability Doppler boosting factors, Lorentz factors, and viewing angles for a large sample of sources by using total flux density observations at 22 and 37GHz and VLBI data. We decomposed the flux curves into exponential flares and determined the variability brightness temperatures of the fastest flares. By assuming the same intrinsic brightness temperature for each source, we calculated the Doppler boosting factors for 87 sources. In addition we used new apparent jet speed data to calculate the Lorentz factors and viewing angles for 67 sources. We find that all quasars in our sample are Doppler-boosted and that the Doppler boosting factors of BL Lacertae objects are lower than of quasars. The new Lorentz factors are about twice as high as in earlier studies, which is mainly due to higher apparent speeds in our analyses. The jets of BL Lacertae objects are slower than of quasars. There are some extreme sources with very high derived Lorentz factors of the order of a hundred. These high Lorentz factors could be real. It is also possible that the sources exhibit such rapid flares that the fast variations have remained undetected in monitoring programmes, or else the sources have a complicated jet structure that is not amenable to our simple analysis. Almost all the sources are seen in a small viewing angle of less than 20 degrees. Our results follow the predictions of basic unification schemes for AGN.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - galaxies: jets - radio continuum: galaxies - radiation mechanisms: non-thermal - galaxies: quasars: general

Errata: erratum vol. 498, p. 723 (2009)

Simbad objects: 87

Full paper

View the references in ADS

Number of rows : 87

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2023	#notes
1	QSO B0003-066	BLL	00 06 13.89288482	-06 23 35.3353584		19.1	18.50	17.14		~	309	1
2	Mrk 1501	Sy1	00 10 31.00590413	+10 58 29.5042981		15.96	15.40	12.22		~	694	0
3	QSO B0016+73	QSO	00 19 45.78637230	+73 27 30.0176020			19.00	18.26		~	287	1
4	QSO B0048-09	BLL	00 50 41.3172421464	-09 29 05.210474100	16.74	16.39	16.22	16.14		~	441	2
5	ICRF J005952.2+581223	QSO	00 59 52.20898133	+58 12 23.6830454						~	21	1
6	4C 01.02	Bla	01 08 38.77110544	+01 35 00.3171844		18.54	18.39	19.05		~	512	1
7	QSO B0133+476	Bla	01 36 58.59480326	+47 51 29.1000720			19.50	19.25	15.21	~	478	1
8	QSO B0149+218	QSO	01 52 18.05904204	+22 07 07.6997943			18	18.89		~	156	1
9	4C 15.05	Bla	02 04 50.41389294	+15 14 11.0436097		21.9	21.00	21.00		~	390	1
10	6C 021252+733537	BLL	02 17 30.81335327	+73 49 32.6217355			19.00	18.97		~	433	1
11	3C 66A	BLL	02 22 39.6114771888	+43 02 07.799534304		15.71	15.21	14.5		~	859	1
12	4C 67.05	QSO	02 28 50.05148365	+67 21 03.0293322		19.5	19.50	18.1		~	243	1
13	4C 28.07	QSO	02 37 52.40567519	+28 48 08.9899986			19.30	16.99		~	571	1
14	QSO B0235+1624	BLL	02 38 38.93010450	+16 36 59.2745528		16.46	15.50	15.92		~	1480	2
15	QSO B0306+101	QSO	03 09 03.62349423	+10 29 16.3409179		18.45		19.91		~	176	1
16	3C 84	Sy2	03 19 48.1599902040	+41 30 42.108850836		13.10	12.48	11.09		~	3872	3
17	4C 32.14	QSO	03 36 30.10760267	+32 18 29.3422162			17.50	16.6		~	627	1
18	QSO B0336-0156	QSO	03 39 30.93778633	-01 46 35.8041892		18.96	18.41	17.33		~	535	1
19	4C 50.11	QSO	03 59 29.74727351	+50 57 50.1618607						~	425	1
20	3C 111	Sy1	04 18 21.2772425736	+38 01 35.801359968		19.75	18.05			~	914	1
21	QSO B0420-0127	QSO	04 23 15.80072217	-01 20 33.0656073		17.50	17.00	16.28		~	1155	3
22	Mrk 1506	Sy1	04 33 11.0956735296	+05 21 15.619461552		15.72	15.05	10.08		~	1954	2
23	QSO B0440-003	QSO	04 42 38.66072366	-00 17 43.4209582		19.59	19.22	17.85		~	379	1
24	4C -02.19	QSO	05 01 12.80988538	-01 59 14.2564557		19.1	18.06	19.04		~	560	1
25	QSO J0530+13	Bla	05 30 56.41674741	+13 31 55.1494688			20.00	19.35		~	930	1
26	7C 055201.39+394824.00	QSO	05 55 30.80561419	+39 48 49.1649683			18.30	17.5		~	492	2
27	QSO B0605-0834	BLL	06 07 59.69924014	-08 34 49.9783246			17.60	17.70		~	432	1
28	7C 064253.00+445430.00	QSO	06 46 32.02599653	+44 51 16.5901185		19.57	18.49	18.64		~	339	1
29	8C 0716+714	BLL	07 21 53.4482942664	+71 20 36.363846516		15.5	15.50	14.27		~	1241	1
30	QSO J0738+1742	BLL	07 38 07.39375312	+17 42 18.9981506		16.76	16.22	15.78		~	956	1
31	QSO B0736+01	QSO	07 39 18.03389906	+01 37 04.6177501		16.90	16.47	16.19		~	663	1
32	QSO B0754+10	BLL	07 57 06.64295154	+09 56 34.8522544		15.43	15.00	15.99		~	425	1
33	7C 080458.39+495918.00	QSO	08 08 39.66628970	+49 50 36.5304041		19.55	19.18	18.34		~	344	2
34	7C 081451.89+423206.00	BLL	08 18 15.99961476	+42 22 45.4148987		18.88	18.18	17.81		~	381	1
35	7C 082754.29+242103.00	QSO	08 30 52.08619250	+24 10 59.8202919		17.62	17.26	16.30		~	499	1
36	4C 71.07	QSO	08 41 24.36528508	+70 53 42.1730435			17.30	16.8		~	742	1
37	[VV98] J085009.6-121334	QSO	08 50 09.63563375	-12 13 35.3761390			16.80	16.02		~	125	0
38	QSO J0854+2006	BLL	08 54 48.8749846272	+20 06 30.639583620		15.91	15.43	15.56		~	2229	1
39	ICRF J092703.0+390220	Sy1	09 27 03.01394144	+39 02 20.8518067		17.17	17.00	16.486		~	974	1
40	4C 40.24	QSO	09 48 55.33815103	+40 39 44.5869471		18.31	18.02	17.85		~	331	1
41	ICRF J095649.8+251516	Sy1	09 56 49.87537985	+25 15 16.0498155		17.46	17.21	17.96		~	310	1
42	6C 095456+654857	BLL	09 58 47.2451872176	+65 33 54.819354600			17.0	15.75		~	668	1
43	4C 01.28	BLL	10 58 29.60520810	+01 33 58.8237454		18.74	18.28	16.68		~	736	2
44	Ton 599	QSO	11 59 31.83391383	+29 14 43.8268224		14.80	14.41	17.652	13.39	~	875	1
45	7C 1219+2830	BLL	12 21 31.6904439888	+28 13 58.500308172		16.81	16.11	14.24		~	832	1
46	4C 21.35	Bla	12 24 54.4583146056	+21 22 46.385507388		17.56	17.50	18.2		~	651	2
47	3C 273	BLL	12 29 06.6998257176	+02 03 08.597629980		13.05	14.830	14.11		~	5651	1
48	3C 279	Bla	12 56 11.16657958	-05 47 21.5251510		18.01	17.75	15.87		~	2931	2
49	7C 1308+3236	BLL	13 10 28.66385420	+32 20 43.7828340		15.61	15.24	17.91		~	815	1
50	QSO B1324+224	QSO	13 27 00.86131319	+22 10 50.1628385			18.90	18.80		~	149	1
51	QSO B1413+135	BLL	14 15 58.81751033	+13 20 23.7128587		21.055	20.000	18.461		~	410	1
52	6C 141804+543700	BLL	14 19 46.5974051952	+54 23 14.787857796		16.17	15.65	14.16		~	568	1
53	QSO B1502+1041	Bla	15 04 24.97978391	+10 29 39.1985309		18.97	18.56	18.94		~	534	1
54	QSO J1512-0906	Bla	15 12 50.53293048	-09 05 59.8297908		16.74	16.54			~	1263	1
55	4C 14.60	BLL	15 40 49.49151924	+14 47 45.8846989		17.72	17.30	17.240		~	399	1
56	4C 10.45	QSO	16 08 46.20318700	+10 29 07.7757424		18.5	18.70	18.03		~	363	1
57	6C 161147+342017	QSO	16 13 41.06424322	+34 12 47.9088535		17.98	17.46	17.07		~	614	1
58	4C 38.41	QSO	16 35 15.49297809	+38 08 04.5005995		18.14	17.97	17.25		~	822	1
59	ICRF J163813.4+572023	Sy1	16 38 13.45629995	+57 20 23.9789828			16.90	16.94		~	337	1
60	3C 345	QSO	16 42 58.80997043	+39 48 36.9939552		16.81	16.59	16.84		~	1658	2
61	ICRF J172824.9+042704	Sy1	17 28 24.95272284	+04 27 04.9138307		17.43	16.99	16.24		~	210	1
62	QSO B1730-130	QSO	17 33 02.70578907	-13 04 49.5482119		18	19.50	18.78	17.39	~	1092	1
63	4C 51.37	Bla	17 40 36.97784792	+52 11 43.4073694		18.16	18.70	16.73		~	392	1
64	QSO B1741-038	QSO	17 43 58.85613537	-03 50 04.6167326			20.40	17.98		~	519	1
65	4C 09.57	BLL	17 51 32.81857326	+09 39 00.7284066		17.46	16.78	15.57		~	904	1
66	8C 1803+784	BLL	18 00 45.6838528560	+78 28 04.018028016		16.4	15.90	15.46		~	712	1
67	3C 371	BLL	18 06 50.6802916920	+69 49 28.109609256		14.77	14.22	11.39		~	830	2
68	4C 56.27	BLL	18 24 07.06837171	+56 51 01.4908155		18.9	19.30	16.48		~	462	1
69	ICRF J182931.7+484446	Sy1	18 29 31.7809732968	+48 44 46.160168892		17.05	16.81	16.860		~	669	1
70	4C 73.18	BLL	19 27 48.4947009120	+73 58 01.572558816			16.06	15.11		~	517	2
71	QSO B1954+513	QSO	19 55 42.73825546	+51 31 48.5461173			18.5	17.34		~	229	1
72	8C 2007+777	BLL	20 05 30.9987913056	+77 52 43.248139536			16.5	17.36		~	430	1
73	QSO B2005+40	QSO	20 07 44.9449261536	+40 29 48.603352020		18.5	19.00	20.3		~	290	1
74	ICRF J202206.6+613658	Sy2	20 22 06.68174620	+61 36 58.8047323			19.00	17.58		~	312	1
75	[VV96] J202456.5+171814	QSO	20 24 56.5636552128	+17 18 13.196337192		17.5	19.5	17.51		~	46	1
76	QSO J2123+0535	QSO	21 23 44.51739933	+05 35 22.0930238		18.3	20.40	19.86		~	276	1
77	QSO B2134+0028	QSO	21 36 38.58632232	+00 41 54.2128562		17.30	17.08	17.02		~	551	2
78	QSO B2136+1410	QSO	21 39 01.30926630	+14 23 35.9921774			18.90	18.22		~	243	1
79	4C 06.69	QSO	21 48 05.45866779	+06 57 38.6041877		16.85	16.47	15.06		~	647	1
80	NAME BL Lac	BLL	22 02 43.2913536816	+42 16 39.979416792		15.66	14.72			~	2178	1
81	4C 31.63	BLL	22 03 14.9756830008	+31 45 38.269473228		15.85	15.58	14.33		~	482	1
82	3C 446	BLL	22 25 47.25929101	-04 57 01.3907626		18.83	18.39	16.3		~	806	1
83	AT20G J222940-083254	QSO	22 29 40.08433313	-08 32 54.4355294		17.80	17.41	17.81		~	330	1
84	4C 11.69	QSO	22 32 36.40890093	+11 43 50.9040592		17.75	17.33			~	1071	2
85	QSO B2232+282	BLL	22 36 22.47084387	+28 28 57.4132050		19.1	19.0	17.60		~	247	1
86	3C 454.3	Bla	22 53 57.7480438728	+16 08 53.561508864		16.57	16.10	15.22		~	2738	2
87	QSO B2254+0727	BLL	22 57 17.30311778	+07 43 12.3025633		17.07	16.36			~	295	1

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