2007A&A...469..437K


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET02:42:05

2007A&A...469..437K - Astronomy and Astrophysics, volume 469, 437-450 (2007/7-2)

FIRST-based survey of compact steep spectrum sources. V. Milliarcsecond-scale morphology of CSS objects.

KUNERT-BAJRASZEWSKA M. and MARECKI A.

Abstract (from CDS):

Multifrequency VLBA observations of the final group of ten objects in a sample of FIRST-based compact steep spectrum (CSS) sources are presented. The sample was selected to investigate whether objects of this kind could be relics of radio-loud AGNs switched off at very early stages of their evolution or possibly to indicate intermittent activity. Initial observations were made using MERLIN at 5GHz. The sources have now been observed with the VLBA at 1.7, 5 and 8.4GHz in a snapshot mode with phase-referencing. The resulting maps are presented along with unpublished 8.4-GHz VLA images of five sources. Some of the sources discussed here show a complex radio morphology and therefore a complicated past that, in some cases, might indicate intermittent activity. One of the sources studied - 1045+352 - is known as a powerful radio and infrared-luminous broad absorption line (BAL) quasar. It is a young CSS object whose asymmetric two-sided morphology on a scale of several hundred parsecs, extending in two different directions, may suggest intermittent activity. The young age and compact structure of 1045+352 is consistent with the evolution scenario of BAL quasars. It has also been confirmed that the submillimetre flux of 1045+352 can be seriously contaminated by synchrotron emission.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: evolution - quasars: absorption lines

Simbad objects: 18

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Number of rows : 18

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 7C 093818.10+395820.00 Sy2 09 41 24.0272828657 +39 44 41.806341013   16.36 16.4     ~ 180 2
2 4C 13.41 Sy1 10 07 26.0965727406 +12 48 56.188170981   15.81 15.68     ~ 378 2
3 6C 101301+522412 QSO 10 16 14.2582543065 +52 09 15.445788406     20.20     ~ 28 1
4 7C 104545.79+351316.00 QSO 10 48 34.2444010963 +34 57 24.883240735           ~ 51 1
5 7C 1049+3827 Sy2 10 52 11.8 +38 11 44   20.9 20.9     ~ 29 1
6 NVSS J105943+312420 Rad 10 59 43.23505 +31 24 20.5213           ~ 5 1
7 4C 35.24 G 11 02 08.7 +34 55 11   19.5       ~ 26 1
8 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2428 1
9 4C 29.42 Rad 11 29 21.7 +29 05 06           ~ 8 1
10 NVSS J113505+370840 rG 11 35 05.9 +37 08 41           ~ 17 1
11 LBQS 1138-0126 QSO 11 41 11.6165811654 -01 43 06.659283647   18.37 17.98     ~ 53 0
12 6C 114419+401458 QSO 11 46 58.29791629 +39 58 34.3045026   18.80 18.45 18.58   ~ 185 1
13 NVSS J130434+352332 Rad 13 04 34.49503 +35 23 33.5313           ~ 15 1
14 87GB 140702.1+365616 QSO 14 09 09.5084379948 +36 42 08.153940776           ~ 12 1
15 4C 28.35 Rad 14 27 40.3 +28 33 26   16.7       ~ 23 1
16 NVSS J162912+285134 Rad 16 29 12.3 +28 51 34           ~ 5 1
17 3C 403.0 Sy2 19 52 15.7997953344 +02 30 24.235518851   15.42 16.5     ~ 300 1
18 NGC 7027 PN 21 07 01.8 +42 14 10   9.1 10.9     ~ 2353 1

    Equat.    Gal    SGal    Ecl

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2021.03.08-02:42:05

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