2000ApJ...541..112T

Query : 2000ApJ...541..112T

2000ApJ...541..112T - Astrophys. J., 541, 112-119 (2000/September-3)

Kinematic age estimates for four compact symmetric objects from the Pearson-Readhead survey.

TAYLOR G.B., MARR J.M., PEARSON T.J. and READHEAD A.C.S.

Abstract (from CDS):

Based on multiepoch observations at 15 and 43 GHz with the Very Long Baseline Array (VLBA), we detect significant angular expansions between the two hot spots of four compact symmetric objects (CSOs). From these relative motions we derive kinematic ages of between 300 and 1200 yr for the radio emission. These ages lend support to the idea that CSOs are produced in a recent phase of activity. These observations also allow us to study the evolution of the hot spots dynamically in individual sources. In all four sources the hot spots are separating along the source axis, but in 1031+567 the tip of the hot spot appears to be moving almost orthogonally to the source axis. Jet components, seen in three of the four sources observed, are found to be moving relativistically outward from the central engines toward the more slowly moving hot spots.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Active - Galaxies: Nuclei - Radio Continuum: Galaxies - techniques: interferometric

Nomenclature: Table 5, Fig.2: [PR88] 0710+439 AN (Nos A2-A3, B3-B5, C2) added. Table 6, Fig.4: [PR88] 1031+567 WN (Nos E1-E2, W1-W2). Table 7, Fig.5: [PR88] 2352+495 AN (Nos D, B3-B5) added.

Simbad objects: 36

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Number of rows : 36
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 B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 266 1
2 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
3 QSO B0710+439 QSO 07 13 38.16413557 +43 49 17.2072102   20.7       ~ 256 0
4 ICRF J103507.0+562846 Sy2 10 35 07.03998083 +56 28 46.7956247   20.2 21.244 20.200   ~ 205 1
5 3C 395 Bla 19 02 55.93889653 +31 59 41.7016439     17.5     ~ 281 2
6 4C 73.18 BLL 19 27 48.4947009120 +73 58 01.572558816     16.06 15.11   ~ 562 2
7 6C 235239+493337 BLL 23 55 09.45814429 +49 50 08.3394994   21.101   18.400   ~ 284 1
8 [PR88] 2352+495 B1 Rad ~ ~           ~ 4 0
9 [PR88] 2352+495 B2 Rad ~ ~           ~ 4 0
10 [PR88] 0108+388 C1 Rad ~ ~           ~ 5 0
11 [PR88] 0108+388 C2 Rad ~ ~           ~ 4 0
12 [PR88] 0108+388 C3 Rad ~ ~           ~ 4 0
13 [PR88] 0108+388 C4 Rad ~ ~           ~ 3 0
14 [PR88] 0108+388 C5 Rad ~ ~           ~ 5 0
15 [PR88] 0108+388 C6 Rad ~ ~           ~ 4 0
16 [PR88] 0108+388 C7 Rad ~ ~           ~ 5 0
17 [PR88] 2352+495 D Rad ~ ~           ~ 3 0
18 [PR88] 0710+439 C2 Rad ~ ~           ~ 1 0
19 [PR88] 0710+439 B5 Rad ~ ~           ~ 1 0
20 [PR88] 0710+439 B4 Rad ~ ~           ~ 1 0
21 [PR88] 0710+439 B2 Rad ~ ~           ~ 1 0
22 [PR88] 0710+439 A3 Rad ~ ~           ~ 1 0
23 [PR88] 0710+439 A2 Rad ~ ~           ~ 1 0
24 [PR88] 1031+567 E1 Rad ~ ~           ~ 1 0
25 [PR88] 1031+567 E2 Rad ~ ~           ~ 1 0
26 [PR88] 1031+567 W1 Rad ~ ~           ~ 1 0
27 [PR88] 1031+567 W2 Rad ~ ~           ~ 1 0
28 [PR88] 2352+495 B3 Rad ~ ~           ~ 2 0
29 [PR88] 2352+495 B4 Rad ~ ~           ~ 2 0
30 [PR88] 2352+495 B5 Rad ~ ~           ~ 2 0
31 [PR88] 2352+495 A Rad ~ ~           ~ 4 0
32 [PR88] 0710+439 C Rad ~ ~           ~ 3 0
33 [PR88] 0710+439 B Rad ~ ~           ~ 3 0
34 [PR88] 2352+495 B Rad ~ ~           ~ 2 0
35 [PR88] 0710+439 A Rad ~ ~           ~ 3 0
36 [PR88] 2352+495 C Rad ~ ~           ~ 4 0

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