2017MNRAS.469.1883M

Query : 2017MNRAS.469.1883M

2017MNRAS.469.1883M - Mon. Not. R. Astron. Soc., 469, 1883-1896 (2017/August-1)

Investigating the unification of LOFAR-detected powerful AGN in the Bootes field.

MORABITO L.K., WILLIAMS W.L., DUNCAN K.J., ROTTGERING H.J.A., MILEY G., SAXENA A., BARTHEL P., BEST P.N., BRUGGEN M., BRUNETTI G., CHYZY K.T., ENGELS D., HARDCASTLE M.J., HARWOOD J.J., JARVIS M.J., MAHONY E.K., PRANDONI I., SHIMWELL T.W., SHULEVSKI A. and TASSE C.

Abstract (from CDS):

Low radio frequency surveys are important for testing unified models of radio-loud quasars and radio galaxies. Intrinsically similar sources that are randomly oriented on the sky will have different projected linear sizes. Measuring the projected linear sizes of these sources provides an indication of their orientation. Steep-spectrum isotropic radio emission allows for orientation-free sample selection at low radio frequencies. We use a new radio survey of the Bootes field at 150 MHz made with the Low-Frequency Array (LOFAR) to select a sample of radio sources. We identify 60 radio sources with powers P > 1025.5 W Hz–1 at 150 MHz using cross-matched multiwavelength information from the AGN and Galaxy Evolution Survey, which provides spectroscopic redshifts and photometric identification of 16 quasars and 44 radio galaxies. When considering the radio spectral slope only, we find that radio sources with steep spectra have projected linear sizes that are on average 4.4 ± 1.4 larger than those with flat spectra. The projected linear sizes of radio galaxies are on average 3.1 ± 1.0 larger than those of quasars (2.0 ± 0.3 after correcting for redshift evolution). Combining these results with three previous surveys, we find that the projected linear sizes of radio galaxies and quasars depend on redshift but not on power. The projected linear size ratio does not correlate with either parameter. The LOFAR data are consistent within the uncertainties with theoretical predictions of the correlation between the quasar fraction and linear size ratio, based on an orientation-based unification scheme.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

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

Simbad objects: 61

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Number of rows : 61
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 SDSS J142456.30+352841.8 QSO 14 24 56.3045885376 +35 28 41.747232900       20.54 19.79 ~ 5 1
2 6C 142310+350605 QSO 14 25 16.5184785456 +34 52 46.553885328       21.06 20.53 ~ 18 1
3 SDSS J142524.22+340935.9 QSO 14 25 24.2200019784 +34 09 35.883047160       19.68 19.38 ~ 10 1
4 NVSS J142531+353341 rG 14 25 31.669 +35 33 41.75       20.24 18.94 ~ 3 1
5 SDSS J142532.83+330124.9 QSO 14 25 32.8282560528 +33 01 24.956047740   20.74 20.48 20.34 20.07 ~ 28 1
6 SDSS J142541.44+345827.3 rG 14 25 41.454 +34 58 27.09       18.74 17.97 ~ 3 0
7 CXOXB J142543.9+335534 AGN 14 25 43.927 +33 55 33.44       22.61 21.46 ~ 6 0
8 [KEC2012] 216.585801+34.671437 rG 14 26 20.5983626664 +34 40 17.002704540       18.63 17.89 ~ 2 0
9 NVSS J142633+333214 rG 14 26 33.5989072536 +33 32 12.204939912       19.17 19.06 ~ 14 1
10 NVSS J142701+330524 rG 14 27 01.644 +33 05 24.96       19.93 18.89 ~ 5 1
11 ELAISR J142701+331222T rG 14 27 02.046 +33 12 22.55       20.73 19.35 ~ 3 0
12 [VV2006] J142744.4+333828 QSO 14 27 44.4415767024 +33 38 28.602947220   19.23 18.91 18.79 19.01 ~ 37 1
13 SDSS J142752.23+353032.1 QSO 14 27 52.2364828632 +35 30 32.197424976       20.29 20.05 ~ 10 1
14 NVSS J142805+351328 rG 14 28 05.197 +35 13 28.49       21.78 19.94 ~ 3 1
15 NVSS J142825+345547 rG 14 28 25.5 +34 55 47       20.25 19.41 ~ 8 1
16 [KEC2012] 217.129795+33.152579 rG 14 28 31.151 +33 09 09.28       19.05 18.04 ~ 2 0
17 SDSS J142834.04+342030.5 QSO 14 28 34.0409834664 +34 20 30.457914612       20.58 20.20 ~ 5 1
18 NVSS J142842+354326 rG 14 28 42.556 +35 43 26.60       20.91 19.88 ~ 6 1
19 NVSS J142852+345200 rG 14 28 52.198 +34 52 00.05       20.84 19.93 ~ 3 0
20 [VV2006] J142910.3+352946 QSO 14 29 10.2224077896 +35 29 46.891301280   19.66 19.35 18.76 18.35 ~ 48 1
21 [KEC2012] 217.299772+33.443868 rG 14 29 11.9238039984 +33 26 37.590457632       18.64 17.81 ~ 2 0
22 [VV2006] J142915.2+343819 QSO 14 29 15.1932642144 +34 38 20.260935996   19.17 19.02 18.32 17.94 ~ 46 0
23 2MASS J14294041+3258010 rG 14 29 40.410 +32 58 01.05   22.50   19.66 18.56 ~ 3 0
24 SDSS J142942.64+335654.7 QSO 14 29 42.6387620664 +33 56 54.803243004   19.60 19.26 18.58 18.43 ~ 38 0
25 [KEC2012] 217.453219+35.296439 rG 14 29 48.773 +35 17 47.18         19.02 ~ 2 0
26 NVSS J143008+344714 rG 14 30 08.885 +34 47 13.75       22.13 21.90 ~ 10 1
27 SDSS J143011.54+350020.5 QSO 14 30 11.5444991400 +35 00 20.559687516       19.34 18.90 ~ 11 0
28 NVSS J143012+331438 rG 14 30 12.6 +33 14 34       21.73 20.54 ~ 8 1
29 CXOXB J143052.3+331323 rG 14 30 52.378 +33 13 22.80       19.71 18.78 ~ 6 0
30 B-HiZELS stV 12 rG 14 30 58.3 +33 31 07       22.87 22.28 ~ 5 1
31 FIRST J143059.8+352209 rG 14 30 59.855 +35 22 09.71       20.32 18.96 ~ 2 0
32 NVSS J143109+335301 rG 14 31 09.858 +33 53 01.67       21.64 20.43 ~ 5 1
33 NDWFS J143127.8+343741 QSO 14 31 27.864 +34 37 40.92       21.61 21.25 ~ 8 1
34 CXOXB J143138.6+353535 rG 14 31 38.7 +35 35 37       22.59 21.88 ~ 8 1
35 FIRST J143149.1+330956 rG 14 31 49.1397458064 +33 09 56.852522244       20.86 20.57 ~ 4 1
36 NAME NOAO Deep Wide Field reg 14 32 05.75 +34 16 47.5           ~ 430 0
37 SDSS J143230.56+343450.2 QSO 14 32 30.5 +34 34 51       21.07 20.20 ~ 5 1
38 B-HiZELS NBH 272 rG 14 32 32.629 +33 59 03.67       22.79 22.10 ~ 3 0
39 NVSS J143233+334304 rG 14 32 33.624 +33 43 05.91       20.27 19.47 ~ 3 1
40 [KEC2012] 218.291313+35.255040 rG 14 33 09.915 +35 15 18.14       19.99 19.13 ~ 2 0
41 2MASS J14331029+3346043 rG 14 33 10.3101472320 +33 46 04.305080100       17.18 16.96 ~ 14 1
42 NVSS J143310+335828 rG 14 33 11.0816196672 +33 58 28.547385672       19.00 18.03 ~ 9 1
43 FIRST J143315.7+332858 rG 14 33 15.763 +33 28 58.98       22.62 21.92 ~ 8 0
44 [KEC2012] 218.318430+34.856913 rG 14 33 16.423 +34 51 24.89       19.25 18.63 ~ 2 0
45 NVSS J143340+334423 rG 14 33 40.9 +33 44 23       19.90 18.90 ~ 4 1
46 NVSS J143355+340930 rG 14 33 55.1296203504 +34 09 33.908358960       20.94 20.58 ~ 8 1
47 SDSS J143431.42+350104.5 QSO 14 34 31.4275516632 +35 01 04.563959736       20.94 20.65 ~ 4 0
48 SDSS J143434.21+351009.4 QSO 14 34 34.2222124680 +35 10 09.429805920       19.90 18.90 ~ 20 1
49 NVSS J143514+332148 rG 14 35 14.8850110104 +33 21 50.336588124       20.02 18.64 ~ 5 1
50 SDSS J143528.39+331931.4 QSO 14 35 28.3945149456 +33 19 31.464962868       18.83 18.73 ~ 15 1
51 NVSS J143529+343422 rG 14 35 29.161 +34 34 22.94       20.75 19.87 ~ 5 1
52 SDSS J143547.62+335309.6 QSO 14 35 47.6187730512 +33 53 09.637774944   21.17 20.83 20.01 19.57 ~ 33 1
53 NVSS J143559+344501 rG 14 35 59.1064117920 +34 45 04.502797920       20.16 19.56 ~ 12 1
54 [KEC2012] 219.013513+33.730146 rG 14 36 03.243 +33 43 48.53       20.77 19.52 ~ 2 0
55 FIRST J143651.2+333910 rG 14 36 51.3043436448 +33 39 10.101364668       20.10 19.82 ~ 11 1
56 SDSS J143713.56+350554.8 QSO 14 37 13.5684717408 +35 05 54.832526520       19.33 19.15 ~ 13 1
57 NVSS J143723+350734 rG 14 37 23.715 +35 07 34.69       20.97 20.16 ~ 9 2
58 NVSS J143730+345746 QSO 14 37 30.376 +34 57 46.81       22.27 21.94 ~ 4 1
59 NVSS J143731+345003 rG 14 37 31.376 +34 50 04.68       20.44 19.04 ~ 3 1
60 7C 1436+3418 QSO 14 38 11.063 +34 04 59.46       20.87 20.52 ~ 7 1
61 [KEC2012] 219.610882+33.843789 rG 14 38 26.612 +33 50 37.64       19.35 18.52 ~ 2 0

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