2020MNRAS.495.3576K

Query : 2020MNRAS.495.3576K

2020MNRAS.495.3576K - Mon. Not. R. Astron. Soc., 495, 3576-3591 (2020/July-2)

A transition from parabolic to conical shape as a common effect in nearby AGN jets.

KOVALEV Y.Y., PUSHKAREV A.B., NOKHRINA E.E., PLAVIN A.V., BESKIN V.S., CHERNOGLAZOV A.V., LISTER M.L. and SAVOLAINEN T.

Abstract (from CDS):

Observational studies of collimation in jets in active galactic nuclei (AGN) are a key to understanding their formation and acceleration processes. We have performed an automated search for jet shape transitions in a sample of 367 AGN using VLBA data at 15 and 1.4 GHz. This search has found 10 out of 29 nearby jets at redshifts z < 0.07 with a transition from a parabolic to conical shape, while the full analysed sample is dominated by distant AGN with a typical z ≃ 1. The ten AGN are UGC 00773, NGC 1052, 3C 111, 3C 120, TXS 0815-094, Mrk 180, PKS 1514+00, NGC 6251, 3C 371, and BL Lac. We conclude that the geometry transition may be a common effect in AGN jets. It can be observed only when sufficient linear resolution is obtained. Supplementing these results with previously reported shape breaks in the nearby AGN 1H 0323+342 and M87, we estimate that the break occurs at 105-106 gravitational radii from the nucleus. We suggest that the jet shape transition happens when the bulk plasma kinetic energy flux becomes equal to the Poynting energy flux, while the ambient medium pressure is assumed to be governed by Bondi accretion. In general, the break point may not coincide with the Bondi radius. The observational data support our model predictions on the jet acceleration and properties of the break point.

Abstract Copyright: © The Author(s) 2020. Published by Oxford University Press on behalf of The Royal Astronomical Society.

Journal keyword(s): galaxies: active - BL Lacertae objects: general - galaxies: jets - quasars: general - radio continuum: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/495/3576): table1.dat table3.dat refs.dat>

Simbad objects: 68

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Number of rows : 68
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 B0016+73 Bla 00 19 45.78637230 +73 27 30.0176020     19.00 18.26   ~ 313 1
2 7C 0059+5808 Bla 01 02 45.76237340 +58 24 11.1366164   20.09 19.22 18.57 17.90 ~ 262 1
3 OHIO C -010 Rad 01 08.5 -00 36           ~ 9 0
4 4C 01.02 Bla 01 08 38.77110544 +01 35 00.3171844   18.54 18.39 19.05   ~ 589 1
5 UGC 773 BLL 01 13 43.14494773 +02 22 17.3162687   16.4 16.0 11.22   ~ 145 1
6 6C 013354+473615 Bla 01 36 58.59480326 +47 51 29.1000720     19.50 19.25 15.21 ~ 537 1
7 QSO J0217+0144 Bla 02 17 48.95475095 +01 44 49.6990271   16.74 16.09 18.51 13.29 ~ 455 1
8 4C 28.07 Bla 02 37 52.40567519 +28 48 08.9899986     19.30 16.99   ~ 654 1
9 NGC 1052 Bla 02 41 04.79849989 -08 15 20.7519527 11.84 11.41 10.47 10.71   ~ 1397 2
10 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
11 6C 032130+340016 BLL 03 24 41.1612813408 +34 10 45.857918460     15.72 13.1   ~ 314 1
12 QSO B0336-0156 Bla 03 39 30.93778633 -01 46 35.8041892   18.96 18.41 17.33   ~ 598 1
13 3C 111 Sy1 04 18 21.2772425736 +38 01 35.801359968   19.75 18.05     ~ 1002 2
14 QSO B0420-0127 Bla 04 23 15.80072217 -01 20 33.0656073   17.50 17.00 16.28   ~ 1263 3
15 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
16 4C -02.19 Bla 05 01 12.80988538 -01 59 14.2564557   19.1 18.06 19.04   ~ 624 1
17 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 1004 1
18 7C 064253.00+445430.00 Bla 06 46 32.02599653 +44 51 16.5901185   19.57 18.49 18.64   ~ 370 1
19 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
20 QSO B0736+01 Bla 07 39 18.03389906 +01 37 04.6177501   16.90 16.47 16.19   ~ 738 1
21 QSO B0754+10 BLL 07 57 06.64295154 +09 56 34.8522544   15.43 15.00 15.99   ~ 461 1
22 QSO B0805-077 Bla 08 08 15.53603763 -07 51 09.8865298     19.80 16.71   ~ 291 1
23 ICRF J081749.7-093330 BLL 08 17 49.7493705648 -09 33 30.523860972 18.38 17.96 17.61 17.51   ~ 82 1
24 7C 082754.29+242103.00 Bla 08 30 52.08619250 +24 10 59.8202919   17.62 17.26 16.30   ~ 563 1
25 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
26 4C 39.25 Bla 09 27 03.01394144 +39 02 20.8518067   17.17 17.00 16.486   ~ 1036 1
27 4C 40.24 Bla 09 48 55.33815103 +40 39 44.5869471   18.31 18.02 17.85   ~ 379 1
28 4C 01.28 BLL 10 58 29.60520810 +01 33 58.8237454   18.74 18.28 16.68   ~ 828 2
29 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 739 1
30 Z 334-43 BLL 11 36 26.4090783600 +70 09 27.309071232   15.16 14.49 10.51   ~ 394 1
31 NGC 3862 Sy2 11 45 05.00904503 +19 36 22.7409909   14.98 13.97     ~ 646 1
32 Ton 599 Bla 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 989 1
33 NGC 4261 LIN 12 19 23.2160630 +05 49 29.700024   13.92 12.87     ~ 1290 0
34 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 6022 1
35 NAME Knot in M87 Jet PoG 12 30 49.355 +12 23 28.32           ~ 233 0
36 NAME M87 Jet Rad 12 30 49.423 +12 23 28.04           ~ 315 1
37 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
38 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
39 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
40 NAME Centaurus A BLL 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4774 3
41 QSO B1413+135 BLL 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 476 1
42 QSO B1502+1041 Bla 15 04 24.97978391 +10 29 39.1985309   18.97 18.56 18.94   ~ 634 1
43 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1409 1
44 Z 21-63 BLL 15 16 40.21905672 +00 15 01.9090936   17.28 16.64 10.53   ~ 217 1
45 4C 14.60 BLL 15 40 49.49151924 +14 47 45.8846989   17.72 17.30 17.240   ~ 448 1
46 6C 161147+342017 Bla 16 13 41.06424322 +34 12 47.9088535   17.98 17.46 17.07   ~ 673 1
47 NGC 6251 Bla 16 32 31.96989253 +82 32 16.3999044 15.24 14.66 12.89 7.62   ~ 772 1
48 4C 38.41 Bla 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 906 1
49 6C 163718+572618 Bla 16 38 13.45629995 +57 20 23.9789828     16.90 16.94   ~ 381 1
50 3C 345 Bla 16 42 58.80997043 +39 48 36.9939552   16.81 16.59 16.84   ~ 1808 3
51 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
52 QSO B1730-130 Bla 17 33 02.70578907 -13 04 49.5482119   18 19.50 18.78 17.39 ~ 1198 1
53 4C 09.57 BLL 17 51 32.81857326 +09 39 00.7284066   17.46 16.78 15.57   ~ 1007 1
54 1RXS J180043.6+782806 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 15.90 16.134   ~ 793 1
55 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
56 2C 1569 Bla 18 29 31.7809732968 +48 44 46.160168892   17.05 16.81 16.860   ~ 713 1
57 6C 184914+670207 Bla 18 49 16.07228484 +67 05 41.6802599     16.90 17.45   ~ 305 2
58 4C 73.18 BLL 19 27 48.4947009120 +73 58 01.572558816     16.06 15.11   ~ 562 2
59 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
60 QSO B2136+1410 Bla 21 39 01.30926630 +14 23 35.9921774     18.90 18.22   ~ 264 1
61 4C 06.69 Bla 21 48 05.45866779 +06 57 38.6041877   16.85 16.47 15.06   ~ 703 1
62 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
63 4C 31.63 BLL 22 03 14.9756830008 +31 45 38.269473228   15.85 15.58 14.33   ~ 523 1
64 QSO B2201+1711 BLL 22 03 26.89368237 +17 25 48.2477620     19.50 14.76   ~ 221 1
65 3C 446 BLL 22 25 47.25929101 -04 57 01.3907626   18.83 18.39 16.3   ~ 863 1
66 QSO B2227-0848 Bla 22 29 40.08433313 -08 32 54.4355294   17.80 17.41 17.81   ~ 391 1
67 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1205 2
68 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 3004 2

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