2011A&A...527L...2C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:06:58

2011A&A...527L...2C - Astronomy and Astrophysics, volume 527, L2-2 (2011/3-1)

An optical spectroscopic survey of the 3CR sample of radio galaxies with z < 0.3. IV. Discovery of the new spectroscopic class of relic radio galaxies.

CAPETTI A., BUTTIGLIONE S., AXON D.J., ROBINSON A., CELOTTI A., BALDI R.D., CHIABERGE M., MACCHETTO F.D. and SPARKS W.B.

Abstract (from CDS):

From an optical spectroscopic survey of 3CR radio galaxies with z<0.3, we discovered a new spectroscopic class of powerful radio-loud AGN. The defining characteristics of these galaxies are that compared with radio galaxies of similar radio luminosity they have: a [OIII]/Hβ ratio of ∼0.5, indicative of an extremely low level of gas excitation; a large deficit of [OIII] emission; and radio core power. We interpret these objects as relic AGN, i.e. sources that experienced a large drop in their level of nuclear activity, causing a decrease in their nuclear and line luminosity. This class opens a novel approach to investigating lifetimes and duty cycles of AGN.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: jets - galaxies: elliptical and lenticular, cD

Simbad objects: 8

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Number of rows : 8

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 87GB 005314.6+260945 BiC 00 55 50.583 +26 24 36.68   18.63   16.26   ~ 196 1
2 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 856 1
3 3C 132 rG 04 56 42.922 +22 49 23.06   18.5       ~ 143 1
4 NGC 5252 Sy2 13 38 15.8711551761 +04 32 33.525903711   15.21 14.21     ~ 419 0
5 3C 314.1 rG 15 10 23.1 +70 45 54   17       ~ 89 0
6 2MASX J16434862+1715489 Sy2 16 43 48.605 +17 15 49.43   17.2       ~ 246 0
7 NAME Hercules A BiC 16 51 08.024 +04 59 34.91     18.25     ~ 432 1
8 LEDA 68751 Sy1 22 23 49.7 -02 06 13   16.93 15.77 16.02   ~ 431 2

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:06:58

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