2010A&A...523A..34C


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.27CEST11:52:53

2010A&A...523A..34C - Astronomy and Astrophysics, volume 523, A34-34 (2010/11-2)

Radio interferometric observations of two core-dominated triple radio sources at z > 3.

CSEH D., FREY S., PARAGI Z., GURVITS L.I. and GABANYI K.E.

Abstract (from CDS):

We selected two radio quasars (J1036+1326 and J1353+5725) based on their 1.4-GHz radio structure, which is dominated by a bright central core and a pair of weaker and nearly symmetric lobes at ∼10'' angular separation. They are optically identified in the Sloan Digital Sky Survey (SDSS) at spectroscopic redshifts z>3. We investigate the possibility that their core-dominated triple morphology can be a sign of restarted radio activity in these quasars, involving a significant repositioning of the radio jet axis. We present the results of high-resolution radio imaging observations of J1036+1326 and J1353+5725, performed with the European Very Long Baseline Interferometry (VLBI) Network (EVN) at 1.6 GHz. These data are supplemented by archive observations from the Very Large Array (VLA). We study the large- and small-scale radio structures and the brightness temperatures, then estimate relativistic beaming parameters. We show that the central emission region of these two high-redshift, core-dominated triple sources is compact but resolved at ∼10 milli-arcsecond resolution. We find that it is not necessary to invoke large misalignment between the VLBI jet and the large-scale radio structure to explain the observed properties of the sources.

Abstract Copyright:

Journal keyword(s): radio continuum: galaxies - galaxies: active - galaxies: jets - quasars: general - quasars: individual: J1036+1326 - quasars: individual: J1353+5725

Status at CDS:  

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 4C 02.27 QSO 09 35 18.1943431119 +02 04 15.564759828   17.31 17.16     ~ 102 1
2 [VV98] J102556.4+125349 QSO 10 25 56.28536996 +12 53 49.0220104   19.5 18.5 18.96   ~ 47 1
3 QSO B1033+1342 QSO 10 36 26.8848891069 +13 26 51.752372510   18.62 18.31     ~ 44 1
4 UGC 8782 LIN 13 52 17.765 +31 26 46.10   16.10 15.10     ~ 419 3
5 [VV2006] J135326.0+572553 QSO 13 53 26.0333495480 +57 25 52.914786406   20.66 20.10     ~ 21 0
6 3C 294 rG 14 06 44.00 +34 11 25.0           ~ 216 1
7 [VV2006] J140812.9+561332 QSO 14 08 12.9454123099 +56 13 32.489645874   19.12 18.95     ~ 33 0
8 8C 1834+620 Sy2 18 35 10.9 +62 04 08           ~ 42 2

    Equat.    Gal    SGal    Ecl

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2020.05.27-11:52:53

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