2024MNRAS.529.1472C

Query : 2024MNRAS.529.1472C

2024MNRAS.529.1472C - Mon. Not. R. Astron. Soc., 529, 1472-1492 (2024/April-1)

The nature of compact radio-loud AGN: a systematic look at the LOFAR AGN population.

CHILUFYA J., HARDCASTLE M.J., PIERCE J.C.S., CROSTON J.H., MINGO B., ZHENG X., BALDI R.D. and ROTTGERING H.J.A.

Abstract (from CDS):

We investigate the nature of low-luminosity radio-loud active galactic nuclei (RLAGN) selected from the LOFAR Two-metre Sky Survey (LoTSS) first data release (DR1). Using optical, mid-infrared, and radio data, we have conservatively selected 55 radiative AGN candidates from DR1 within the redshift range 0.03 < z < 0.1. We show using high-frequency Karl G. Jansky Very Large Array (VLA) observations that 10 out of 55 objects show radio emission on scales >1-3 kpc, 42 are compact at the limiting resolution of 0.35 arcsec (taking an upper limit on the projected physical size, this corresponds to less than 1 kpc), and three are undetected. The extended objects display a wide range of radio morphologies: two-jet (5), one-jet (4), and double-lobed (1). We present the radio spectra of all detected radio sources which range from steep to flat/inverted and span the range seen for other compact radio sources such as compact symmetric objects (CSOs), compact steep spectrum (CSS) sources, and gigahertz peaked-spectrum (GPS) sources. Assuming synchrotron self-absorption (SSA) for flat/inverted radio spectrum sources, we predict small physical sizes for compact objects to range between 2 and 53 pc. Alternatively, using free-free absorption (FFA) models, we have estimated the free electron column depth for all compact objects, assuming a homogeneous absorber. We find that these objects do not occupy a special position on the power/linear size (P - D) diagram but some share a region with radio-quiet quasars (RQQs) and the so-called 'FR0' sources in terms of radio luminosity and linear size.

Abstract Copyright: © 2024 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): galaxies: active - galaxies: jets - radio continuum: galaxies

Simbad objects: 63

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Number of rows : 63
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 ICRF J103507.0+562846 Sy2 10 35 07.03998083 +56 28 46.7956247   20.2 21.244 20.200   ~ 205 1
2 Z 241-17 Sy2 10 48 52.9227011112 +48 03 14.762526804   16.0       ~ 38 1
3 LEDA 2282001 rG 10 55 35.8172598926 +46 29 03.363091930           ~ 4 0
4 2MASX J11023365+5131248 rG 11 02 33.6420299160 +51 31 24.359864628           ~ 10 0
5 LEDA 2518865 rG 11 11 56.6 +55 54 47           ~ 3 0
6 Z 242-17 G 11 17 12.0913729680 +46 51 35.508788172   15.4       ~ 32 0
7 2MASX J11174592+4733280 LIN 11 17 45.9257787000 +47 33 27.625923360           ~ 8 0
8 NVSS J112625+520502 rG 11 26 25.1909341248 +52 05 03.586863444           ~ 16 0
9 2MASX J11354528+4916198 rG 11 35 45.3161270376 +49 16 20.190484776           ~ 8 0
10 2MASX J11375723+5542071 rG 11 37 57.1686321336 +55 42 07.691365836           ~ 9 0
11 Z 242-73 rG 11 40 47.3544936984 +46 32 25.711606428   15.2       ~ 42 1
12 LEDA 2496550 Sy2 11 43 16.2761794800 +55 16 39.616545396           ~ 22 0
13 6C 114405+541331 Bla 11 46 44.20434354 +53 56 43.0826910   20.5 20.5 19.82   ~ 72 1
14 MCG+09-19-182 BiC 11 47 21.3814927776 +55 43 48.542981664   16.55       ~ 31 0
15 LEDA 2491113 LIN 11 51 13.4656213200 +55 06 59.180513832       15.74   ~ 20 0
16 SDSS J115157.90+532845.6 rG 11 51 57.9053754288 +53 28 45.644189916           ~ 4 0
17 NVSS J115205+545814 rG 11 52 05.7679388016 +54 58 16.975150140           ~ 9 0
18 LEDA 3401316 LIN 11 53 30.5792847288 +52 41 21.942816756           ~ 25 0
19 MCG+08-22-034 rG 11 54 38.1038098152 +49 18 51.391797984   18       ~ 6 0
20 MCG+09-20-030 SyG 11 55 31.3920328872 +54 52 00.440508756   17       ~ 28 0
21 LEDA 2505536 rG 11 59 52.1720363880 +55 32 05.518652712           ~ 21 1
22 MCG+09-20-074 rG 12 03 28.3665282504 +51 42 56.042215200   16       ~ 18 0
23 ILT J120801.00+523635.3 AG? 12 08 01.0143106332 +52 36 35.169099427           ~ 1 0
24 NGC 4187 Bla 12 13 29.2778975688 +50 44 29.374130220   14.18       ~ 78 2
25 6C 121638+484640 Bla 12 19 06.41475008 +48 29 56.1647529   21.22 20.49 19.90   ~ 146 1
26 Z 244-25 QSO 12 30 11.8521285960 +47 00 22.654126404   15.6       ~ 49 1
27 LEDA 2527933 rG 12 33 01.23288 +56 10 13.9296           ~ 6 0
28 LEDA 2305745 rG 12 40 21.5 +47 51 44           ~ 4 0
29 LEDA 2481304 rG 12 43 43.5 +54 49 02           ~ 3 0
30 LEDA 2368343 rG 12 58 27.2954921232 +50 16 50.203626708           ~ 5 0
31 SDSS J130325.88+523522.3 rG 13 03 25.88088 +52 35 22.3260           ~ 2 0
32 MCG+08-24-032 G 13 04 04.6052691528 +49 27 28.082052360   16       ~ 20 0
33 LEDA 3087035 rG 13 04 10.8120472728 +55 28 39.102414996           ~ 8 0
34 FIRST J130535.9+540142 rG 13 05 35.9080070520 +54 01 42.198221028           ~ 6 0
35 SDSS J131002.05+540005.1 rG 13 10 02.05768 +54 00 05.1010           ~ 2 0
36 LEDA 3087095 rG 13 10 15.2045289240 +54 40 04.544479092           ~ 8 0
37 FIRST J131024.9+512017 rG 13 10 24.8773556832 +51 20 17.541253140           ~ 7 0
38 Z 271-42 LIN 13 27 45.7025842992 +54 47 56.826573540   15.7       ~ 31 0
39 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
40 SDSS J133430.03+502718.4 rG 13 34 30.031 +50 27 18.39           ~ 5 0
41 LEDA 2515693 rG 13 42 27.932 +55 49 39.91           ~ 4 0
42 NVSS J134233+485314 rG 13 42 33.8543568120 +48 53 16.228992804           ~ 3 0
43 LEDA 2509027 rG 13 43 45.0143091696 +55 38 01.591418328           ~ 14 0
44 4C 53.28 Bla 13 49 34.65661554 +53 41 17.0400909   17.95 17.67 17.06   ~ 151 1
45 NVSS J135632+493712 rG 13 56 32.6373278976 +49 37 10.970672988           ~ 6 0
46 LEDA 2281095 rG 14 00 13.1996985504 +46 25 55.931566872           ~ 12 0
47 Mrk 668 BLL 14 07 00.39441712 +28 27 14.6901341   16.13 15.35 10.29   ~ 826 3
48 LEDA 2441793 LIN 14 09 06.8735312544 +53 27 48.738288492   18.4 17.2     ~ 18 0
49 MCG+09-23-051 LIN 14 11 18.5128174320 +55 10 53.143487616   15       ~ 19 0
50 FIRST J141149.5+545733 rG 14 11 49.5818639472 +54 57 33.265292256           ~ 6 0
51 NVSS J141234+494606 rG 14 12 34.8610749504 +49 46 11.417462796           ~ 2 0
52 LEDA 2507467 rG 14 14 22.35910 +55 35 20.6402           ~ 4 0
53 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 630 1
54 LEDA 2476565 rG 14 20 25.2481051584 +54 40 16.081988700           ~ 5 0
55 NVSS J142125+482933 rG 14 21 25.5146744976 +48 29 33.331842600           ~ 11 0
56 NVSS J142251+474712 rG 14 22 55.5508302576 +47 47 13.910259876           ~ 5 0
57 FIRST J142707.2+525001 rG 14 27 07.2721375824 +52 50 01.457543832           ~ 5 0
58 IC 1027 LIN 14 29 48.4973920728 +53 57 54.001978272   15.4       ~ 32 0
59 LEDA 3087204 rG 14 33 34.7046641136 +52 43 10.319128176           ~ 18 0
60 6C 143339+510410 LIN 14 35 21.6699085551 +50 51 22.922806306           ~ 24 1
61 LEDA 2459124 rG 14 53 50.1 +54 04 41           ~ 4 0
62 LEDA 3087398 LIN 14 54 15.1000647600 +49 25 49.885686336           ~ 25 0
63 NVSS J150422+474110 rG 15 04 22.2131670504 +47 41 12.149060640   15.4       ~ 20 0

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