2005A&A...442L..39H


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.08CET13:58:29

2005A&A...442L..39H - Astronomy and Astrophysics, volume 442, L39-43 (2005/11-2)

Spitzer IRS spectroscopy of 3CR radio galaxies and quasars: testing the unified schemes.

HAAS M., SIEBENMORGEN R., SCHULZ B., KRUEGEL E. and CHINI R.

Abstract (from CDS):

With the Spitzer Space Telescope Infrared Spectrograph (IRS) we have observed seven powerful FR2 radio galaxies and seven quasars. Both samples, the galaxies and the quasars, are comparable in isotropic 178MHz luminosity (1026.5W/Hz≲P178MHz≲1029.5W/Hz) and in redshift range (0.05≲z≲1.5). We find for both samples similar distributions in the luminosity ratios of high- to low-excitation lines ([NeV]14.3µm/[NeII]12.8µm) and of high-excitation line to radio power ([NeV]24.3µm/P178MHz). This solves the long debate about the apparent difference of quasars and radio galaxies in favor of the orientation-dependent unified schemes. Furthermore, the luminosity ratio [OIII]500.7nm/[OIV]25.9µm of most galaxies is by a factor of ten lower than that of the quasars. This suggests that the optical emission from the central NLR is essentially absorbed (AV>3) in the powerful FR2 galaxies and that the [OIII]500.7nm luminosity does not serve as isotropic tracer for testing the unified schemes.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: nuclei - galaxies: quasars: general - infrared: galaxies

Simbad objects: 14

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Number of rows : 14

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 2E 437 Sy1 01 36 24.4206016519 +20 57 27.523115842   18.15 18.10     ~ 342 2
2 3C 79.0 Sy2 03 10 00.0932580214 +17 05 58.593728115   19.54 18.75     ~ 240 3
3 ICRF J041340.3+111214 Sy1 04 13 40.3430536536 +11 12 14.788657086   18.96 18.01     ~ 292 2
4 7C 110025.60+771511.00 Sy1 11 04 13.8613944317 +76 58 58.192391742   15.70 15.72 15.40   ~ 506 1
5 3C 295 Sy2 14 11 20.467 +52 12 09.52   22.34 20.80 18.54   ~ 881 5
6 3C 298.0 QSO 14 19 08.1804677481 +06 28 34.803573057   17.12 16.79     ~ 364 1
7 8C 1443+773 Sy2 14 43 14.0 +77 07 28   19   18.730   ~ 137 1
8 3C 321 Sy2 15 31 43.473 +24 04 18.93   16.0   15.40   ~ 303 1
9 2MASX J15474353+2052167 Sy1 15 47 43.5377678391 +20 52 16.613895999   16.80 16.69 15.70   ~ 438 0
10 6C 170404+604844 Sy1 17 04 41.3742389551 +60 44 30.522600868   15.65 15.40 15.30   ~ 718 1
11 3C 356 QSO 17 24 20.2 +50 57 14   21.5 21.5     ~ 215 1
12 2MASX J18334627+4727027 Sy1 18 33 46.2946109378 +47 27 02.568353862   18.64 17.24     ~ 193 1
13 LEDA 68751 Sy1 22 23 49.7 -02 06 13   16.93 15.77 16.02   ~ 426 2
14 2C 1883 Sy2 23 16 35.1925435787 +04 05 18.292942690   17.54 16.68 17.220   ~ 271 1

    Equat.    Gal    SGal    Ecl

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2019.12.08-13:58:29

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