2015A&A...579A..89C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST08:17:52

2015A&A...579A..89C - Astronomy and Astrophysics, volume 579A, 89-89 (2015/7-1)

Defying jet-gas alignment in two radio galaxies at z ∼ 2 with extended light profiles: Similarities to brightest cluster galaxies.

COLLET C., NESVADBA N.P.H., DE BREUCK C., LEHNERT M.D., BEST P., BRYANT J.J., DICKEN D., JOHNSTON H., HUNSTEAD R. and WYLEZALEK D.

Abstract (from CDS):

We report the detection of extended warm ionized gas in two powerful high-redshift radio galaxies, NVSS J210626-314003 at z=2.10 and TXS 2353-003 at z=1.49, that does not appear to be associated with the radio jets. This is contrary to what would be expected from the alignment effect, a characteristic feature of distant, powerful radio galaxies at z≥0.6. The gas also has smaller velocity gradients and line widths than most other high-z radio galaxies with similar data. Both galaxies are part of a systematic study of 50 high-redshift radio galaxies with SINFONI, and are the only two that are characterized by the presence of high surface-brightness gas not associated with the jet axis and by the absence of such gas aligned with the jet. Both galaxies are spatially resolved with ISAAC broadband imaging covering the rest-frame R band, and have extended wings that cannot be attributed to line contamination. We argue that the gas and stellar properties of these galaxies are more akin to gas-rich brightest cluster galaxies in cool-core clusters than the general population of high-redshift radio galaxies at z>2. In support of this interpretation, one of our sources, TXS 2353-003, for which we have Hα narrowband imaging, is associated with an overdensity of candidate Hα emitters by a factor of ∼8 relative to the field at z=1.5. We discuss possible scenarios of the evolutionary state of these galaxies and the nature of their emission line gas within the context of cyclical AGN feedback.

Abstract Copyright:

Journal keyword(s): Galaxy: formation - galaxies: active - quasars: emission lines - galaxies: high-redshift - galaxies: clusters: general - galaxies: jets

Nomenclature: Table 2: [CND2015] a N=7 (Nos a-g).

Simbad objects: 20

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Number of rows : 20

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 PKS 0128-264 Rad 01 30 28.7 -26 10 06           ~ 6 0
2 ACO 262 ClG 01 52 50.4 +36 08 46           ~ 652 1
3 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 1939 1
4 ZwCl 0335+0956 ClG 03 38 35.3 +09 57 54           ~ 343 1
5 4C 60.07 rG 05 12 54.80 +60 30 51.7           ~ 87 1
6 NAME Hya A LIN 09 18 05.651 -12 05 43.99   14.38 14.8     ~ 908 1
7 NAME Spiderweb Galaxy AGN 11 40 48.3 -26 29 09     22.00     ~ 249 1
8 3C 265.0 Sy1 11 45 29.0 +31 33 50   20.0       ~ 237 0
9 NGC 4696 BiC 12 48 49.277 -41 18 39.92   11.21   10.7   ~ 455 3
10 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1154 0
11 NVSS J210626-314003 rG 21 06 25.92 -31 40 01.9           ~ 5 0
12 LEDA 2830749 rG 21 06 58.16 -24 05 11.3   23.0       ~ 70 1
13 [CND2015] g G? 23 55 30.72 -00 01 45.7           ~ 1 0
14 [CND2015] f G? 23 55 31.92 -00 01 33.8           ~ 1 0
15 [CND2015] c G? 23 55 32.56 -00 01 59.2           ~ 1 0
16 [CND2015] a G? 23 55 35.58 -00 02 46.2           ~ 1 0
17 NAME TXS J2355-0002 rG 23 55 36.7 -00 02 58           ~ 20 2
18 [CND2015] d G? 23 55 37.64 -00 03 23.9           ~ 1 0
19 [CND2015] e G? 23 55 37.74 -00 01 35.3           ~ 1 0
20 [CND2015] b G? 23 55 37.95 -00 01 36.8           ~ 1 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-08:17:52

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