2003A&A...399..889G


C.D.S. - SIMBAD4 rel 1.7 - 2020.09.23CEST22:51:59

2003A&A...399..889G - Astronomy and Astrophysics, volume 399, 889-897 (2003/3-1)

Lobe advance velocities in the extragalactic compact symetric object 4C 31.04.

GIROLETTI M., GIOVANNINI G., TAYLOR G.B., CONWAY J.E., LARA L. and VENTURI T.

Abstract (from CDS):

We report on the results of a two epoch study of the low power Compact Symmetric Object 4C 31.04. Observations performed with the VLBA at 5GHz in 1995 and 2000 have yielded images of this source at milliarcsecond angular resolution. A central core is detected, with bright compact hot spots and extended lobes on both sides. Model-fitting and other analysis of the data (brightness profile, difference map) clearly indicate that the source is expanding. We estimate the velocity of this expansion to be (0.085±0.016)mas/yr, i.e. (0.33±0.06)h65–1c in both hot spots. Assuming a constant expansion velocity, we estimate the kinematic age of the source at 550yrs. We also study the spectral index using VLBA observations at 1.3GHz and MERLIN at 22GHz. The derived spectral age is 3000-5000 years in equipartition conditions. The two estimates are discussed and found to be in agreement, given present uncertainties.

Abstract Copyright:

Journal keyword(s): galaxies: active - galaxies: individual: 4C 31.04 - galaxies: nuclei

Nomenclature: Fig.3, Table 1: [GGT2003] 4C 31.04 W (Nos E, W, C), [GGT2003] 4C 31.04 WN (Nos W1-W3, E1-E6).

CDS comments: parag. 2.1: calibrator J0423-1020 not identified.

Simbad objects: 4

goto Full paper

goto View the reference in ADS

Number of rows : 4

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 31.04 rG 01 19 35.0033970 +32 10 50.058043   16 14.5     ~ 217 1
2 QSO B0133+476 QSO 01 36 58.59480585 +47 51 29.1000445     18.0 19.25 15.21 ~ 450 1
3 2MASS J03512857-1429082 Sy1 03 51 28.5672281753 -14 29 08.258414299 15.62 16.55 16.22     ~ 177 1
4 4C 09.57 BLL 17 51 32.81857318 +09 39 00.7284829   17.46 16.78 15.57   ~ 816 1

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2003A&A...399..889G and select 'bookmark this link' or equivalent in the popup menu


2020.09.23-22:51:59

© Université de Strasbourg/CNRS

    • Contact