2001A&A...377..377S


C.D.S. - SIMBAD4 rel 1.7 - 2020.04.05CEST22:19:12

2001A&A...377..377S - Astronomy and Astrophysics, volume 377, 377-388 (2001/10-2)

VLBA observations of GHz-Peaked-Spectrum radio sources at 15 GHz.

STANGHELLINI C., DALLACASA D., O'DEA C.P., BAUM S.A., FANTI R. and FANTI C.

Abstract (from CDS):

We present VLBA observations at 15GHz of ten GHz Peaked Spectrum (GPS) radio sources. The cores are often difficult or impossible to locate. When likely cores are found, they account for a small fraction of the flux density in GPS galaxies - around or below 2%, while in GPS quasars they can account for more than 20% of the total flux density. We detect low polarization in the GPS sources - i.e., typically less than a few percent and often less than one percent. This establishes that low polarization in the parsec scale structure is an important defining characteristic of the GPS sources. The dichotomy in the radio morphology versus optical identification, i.e., galaxies are symmetric and quasars are not, is basically confirmed from these new data, which also indicate that the radio emission from GPS quasars is dominated by a jet, with often a weak or hidden core, suggesting they are at moderate angles to the line of sight, and so are only moderately beamed.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: general - radio continuum: galaxies

Errata: erratum vol.379, p.870 (2001)

Status at CDS:  

Simbad objects: 13

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Number of rows : 13

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 QSO B0108+388 Bla 01 11 37.31680 +39 06 28.1039     22 22.000   ~ 232 1
2 ICRF J050321.1+020304 Sy2 05 03 21.19717510 +02 03 04.6763382   22.500 21.350 20.682   ~ 172 1
3 ICRF J074110.7+311200 Sy1 07 41 10.7033434 +31 12 00.231016   17.02 16.89 16.322   ~ 406 1
4 QSO B0742+103 QSO 07 45 33.05952141 +10 11 12.6923363       23.72   ~ 173 1
5 4C -00.28 QSO 07 45 54.08232111 -00 44 17.5398546   18 17.1 16.69   ~ 172 1
6 QSO B1143-245 QSO 11 46 08.1038916032 -24 47 32.896655354   17.97 18.0 17.20   ~ 110 1
7 ICRF J134733.3+121724 Sy2 13 47 33.36161542 +12 17 24.2402572   19.28 18.44 15.718   ~ 523 3
8 QSO B1404+286 BLL 14 07 00.3933203928 +28 27 14.695133019   16.13 15.35 10.29   ~ 669 2
9 QSO B2126-15 QSO 21 29 12.17589777 -15 38 41.0413097   17.61 17.3 17.3   ~ 460 1
10 ICRF J213032.8+050217 G 21 30 32.87739291 +05 02 17.4741657     23.4     ~ 138 1
11 QSO B2134+0028 QSO 21 36 38.5862648232 +00 41 54.210724774   17.30 17.08 17.02   ~ 520 2
12 87GB 221004.9+013803 AGN 22 12 37.9679 +01 52 51.267     21.7     ~ 74 1
13 ICRF J235509.4+495008 Sy2 23 55 09.45814510 +49 50 08.3395036   21.101   18.400   ~ 244 1

    Equat.    Gal    SGal    Ecl

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2020.04.05-22:19:12

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