2025ApJ...987...26S

Query : 2025ApJ...987...26S

2025ApJ...987...26S - Astrophys. J., 987, 26 (2025/July-1)

Exploring Compact Symmetric Objects with Complex Morphologies.

SHELDAHL E.E., TAYLOR G.B., TREMBLAY S.E., PETERS W., KIEHLMANN S., BLANDFORD R.D., LISTER M.L., PEARSON T.J., READHEAD A.C.S., SCHINZEL F., SIEMIGINOWSKA A. and SKALIDIS R.

Abstract (from CDS):

Compact symmetric objects (CSOs) are a unique class of jetted active galactic nuclei defined by subkiloparsec radio emission, showing radio structure on both sides of the central engine. CSOs tend to exhibit little to no relativistic beaming, thereby allowing us to determine their physical characteristics, such as the magnetic field strength and particle energy density. Selected with a literature search, we describe very long baseline interferometry observations, imaging, and analyses of 167 CSO candidates. We identified 65 new bona fide CSOs, thus almost doubling the number of known bona fide CSOs to 144. With our greater breadth of sources, we confirm that edge-dimmed CSOs (CSO-1s) may represent a more diverse population than originally expected. We highlight a number of CSOs with complex morphologies, including candidates for supermassive binary black holes and CSOs that appear to have morphologies akin to wide-angle tail galaxies, which could perhaps indicate that some CSOs are experiencing a galactic merger.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Active galactic nuclei - Active galaxies - Relativistic jets

Simbad objects: 50

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Number of rows : 50
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 PMN J0015-1807 rG 00 15 34.32453078 -18 07 25.5865304           ~ 14 0
2 QSO B0034-220 QSO 00 37 14.8262749944 -21 45 24.709587336     19.0     ~ 23 1
3 NGC 262 Bla 00 48 47.14147900 +31 57 25.0845702 14.04 13.90 13.06 8.53   ~ 778 2
4 QSO B0131-001 QSO 01 34 12.70415461 +00 03 45.1386194   23.34 22.50 20.780   ~ 43 1
5 NVSS J020537+752207 Rad 02 05 37.81 +75 22 07.9           ~ 6 0
6 QSO B0240-217 QSO 02 42 35.90987284 -21 32 25.9348722   17       ~ 58 1
7 NVSS J034729+200453 Rad 03 47 29.55919451 +20 04 53.0434600           ~ 18 1
8 ICRF J040549.2+380332 SyG 04 05 49.26287155 +38 03 32.2348497   18.5 18.5     ~ 187 3
9 ICRF J042805.8+325952 Bla 04 28 05.80875891 +32 59 52.0442031       21.39   ~ 50 1
10 NGC 2110 Sy2 05 52 11.3768668776 -07 27 22.507465392   14.77 13.51 11.86   ~ 712 1
11 NVSS J062019+210229 Rad 06 20 19.52849260 +21 02 29.5454909           ~ 26 1
12 QSO B0646+600 Bla 06 50 31.25435548 +60 01 44.5549353   18.9 18.6 19.65   ~ 125 1
13 ICRF J075654.6+634759 Bz? 07 56 54.6107 +63 47 59.022       22.45   ~ 27 1
14 ICRF J083216.0+183212 Sy2 08 32 16.0416 +18 32 12.124   18       ~ 60 1
15 6C 090251+464619 Bla 09 06 15.53979871 +46 36 19.0241852   16.80 16.08     ~ 63 1
16 ICRF J090752.9+681544 QSO 09 07 52.9483459368 +68 15 44.914420908           ~ 18 0
17 Z 91-10 LIN 09 09 37.4414 +19 28 08.297   15.7       ~ 61 1
18 4C 39.25 Bla 09 27 03.01394144 +39 02 20.8518067   17.17 17.00 16.486   ~ 1036 1
19 ICRF J093501.0+071918 Sy1 09 35 01.07598017 +07 19 18.6101555           ~ 28 1
20 NVSS J105218+831727 Rad 10 52 18.20732792 +83 17 26.6320214           ~ 5 0
21 6C 114419+401458 Bla 11 46 58.29791724 +39 58 34.3043988   18.80 18.45 18.58   ~ 261 1
22 NVSS J120331+463255 rG 12 03 31.7958 +46 32 55.562           ~ 23 1
23 NGC 4093 LIN 12 05 51.4765188962 +20 31 19.053573291   15.3       ~ 59 1
24 4C 17.54 QSO 12 15 14.72006420 +17 30 02.2543564   20.0       ~ 26 1
25 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3205 2
26 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
27 NVSS J125815+542152 rG 12 58 15.6094 +54 21 52.125           ~ 16 1
28 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
29 SDSS J131253.19+554813.2 QSO 13 12 53.1977917080 +55 48 13.115320488           ~ 25 2
30 NVSS J132650+571207 Rad 13 26 50.57234169 +57 12 06.7458645           ~ 24 1
31 ICRF J134013.3-033520 BLL 13 40 13.30446530 -03 35 20.8029609   18.0       ~ 18 0
32 Mrk 668 BLL 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 826 3
33 QSO B1413+135 BLL 14 15 58.81751033 +13 20 23.7128587   21.055 20.000 18.461   ~ 476 1
34 87GB 144033.7+305506 AG? 14 42 41.5312 +30 42 32.941           ~ 10 1
35 NVSS J150747+585728 rG 15 07 47.38610 +58 57 27.6481           ~ 15 1
36 NVSS J163231+354738 rG 16 32 31.2544 +35 47 37.736           ~ 12 1
37 NVSS J163925+863153 Rad 16 39 25.01524568 +86 31 53.1321853           ~ 15 1
38 NGC 6521 Bla 17 55 48.4316054256 +62 36 44.129200428   14.3   9.3   ~ 75 1
39 7C 1815+6125 BLL 18 15 36.79225624 +61 27 11.6475505   21.272   19.122   ~ 44 1
40 QSO B1826+796 Bla 18 23 14.10855195 +79 38 49.0018505   19.269 16.70 17.415   ~ 74 1
41 NVSS J184535+354116 rG 18 45 35.10883099 +35 41 16.7264948   19.830   21.900   ~ 68 0
42 SNR G031.9+00.0 SNR 18 49 16.3 -00 55 01           ~ 368 2
43 ICRF J185527.7+374256 Bla 18 55 27.70681096 +37 42 56.9655757       20.20   ~ 41 1
44 ICRF J193522.7+813014 Bz? 19 35 22.72304452 +81 30 14.5529784     21.1 20.90   ~ 22 0
45 ICRF J213750.0-204231 Sy1 21 37 50.00785656 -20 42 31.6728477   20.400 19.4 19.286   ~ 102 1
46 NAME SMM J21536+1741 BiC 21 53 36.82670 +17 41 43.7260     19.58     ~ 49 2
47 6C 224248+820906 QSO 22 42 43.63860891 +82 24 47.0138065           ~ 9 1
48 ICRF J224435.1+260020 Bla 22 44 35.1469745568 +26 00 20.700117468       18.83   ~ 33 0
49 NGC 7674 Sy1 23 27 56.6973043968 +08 46 44.253707772 13.84 13.92 13.23 12.64   ~ 738 2
50 NVSS J233046+315533 Rad 23 30 46.15996000 +31 55 33.5078419           ~ 19 1

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