2016A&A...589L...3M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST23:05:38

2016A&A...589L...3M - Astronomy and Astrophysics, volume 589, L3-3 (2016/5-1)

Compact radio cores in radio-quiet active galactic nuclei.

MAINI A., PRANDONI I., NORRIS R.P., GIOVANNINI G. and SPITLER L.R.

Abstract (from CDS):

Context. The mechanism of radio emission in radio-quiet (RQ) active galactic nuclei (AGNs) is still debated and might arise from the central AGN, from star formation activity in the host, or from either of these sources. A direct detection of compact and bright radio cores embedded in sources that are classified as RQ can unambiguously determine whether a central AGN significantly contributes to the radio emission.
Aims. We search for compact, high-surface-brightness radio cores in RQ AGNs that are caused unambiguously by AGN activity.
Methods. We used the Australian Long Baseline Array to search for compact radio cores in four RQ AGNs located in the Extended Chandra Deep Field South (ECDFS). We also targeted four radio-loud (RL) AGNs as a control sample.
Results. We detected compact and bright radio cores in two AGNs that are classified as RQ and in one that is classified as RL. Two RL AGNs were not imaged because the quality of the observations was too poor.
Conclusions. We report on a first direct evidence of radio cores in RQ AGNs at cosmological redshifts. Our detections show that some of the sources that are classified as RQ contain an active AGN that can contribute significantly (∼50% or more) to the total radio emission.

Abstract Copyright: © ESO, 2016

Journal keyword(s): galaxies: active - galaxies: high-redshift - radio continuum: galaxies

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0208-512 BLL 02 10 46.2000629834 -51 01 01.893312084   17.10 16.93 14.82   ~ 379 1
2 [KFM2008] RID 5 AGN 03 31 14.47 -27 55 46.9       23.40   ~ 10 0
3 [LBA2005] 47 EmG 03 31 25.31 -27 59 59.4       22.96   ~ 16 0
4 [DSS2017] 243 G 03 31 30.750 -27 57 34.66       23.86   ~ 14 0
5 [HKS2013] ALESS 070.1 G 03 31 44.03 -27 38 35.8 25.19 23.87 23.78 23.41 23.61 ~ 27 0
6 ATCDFS J033146.08-280027.2 Rad 03 31 46.08 -28 00 27.2       24.45   ~ 11 0
7 ATCDFS J033202.83-275612.6 Rad 03 32 02.84 -27 56 12.6           ~ 11 0
8 NAME Extended Chandra Deep Field South reg 03 32 30.0 -27 48 20           ~ 613 0
9 [LBA2005] 609 AGN 03 33 11.80 -27 41 38.2       23.96   ~ 18 0
10 ATCDFS J033336.45-274354.3 G 03 33 36.46 -27 43 54.3       25.22   ~ 19 0
11 QSO B0346-279 QSO 03 48 38.14457723 -27 49 13.5655526   20.08 18.63 17.72   ~ 143 1
12 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5332 6
13 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2066 0

    Equat.    Gal    SGal    Ecl

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2020.07.06-23:05:38

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