2010A&A...513A..18F


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST22:49:08

2010A&A...513A..18F - Astronomy and Astrophysics, volume 513, A18-18 (2010/4-1)

The radio-loud active nucleus in the ``dark lens'' galaxy J1218+2953.

FREY S., PARAGI Z., CAMPBELL R.M. and MOOR A.

Abstract (from CDS):

There is a possibility that the optically unidentified radio source J1218+2953 may act as a gravitational lens, producing an optical arc ∼4" away from the radio position. Until now, the nature of the lensing object has been uncertain since it is not detected in any waveband other than the radio. The estimated high mass-to-light ratio could even allow the total mass of this galaxy to be primarily in the form of dark matter. In this case, J1218+2953 could be the first known example of a ``dark lens''. We investigate the nature of J1218+2953 by means of high-resolution radio imaging observations to determine whether there is a radio-loud active galactic nucleus (AGN) in the position of the lensing object. We report on Very Long Baseline Interferometry (VLBI) observations with the European VLBI Network (EVN) at 1.6 and 5GHz. Our images, having angular resolutions of ∼1 to ∼10 milli-arcseconds (mas), reveal a rich and complex radio structure extending to almost 1". Based on its radio spectrum and structure, J1218+2953 can be classified as a compact steep-spectrum (CSS) source, and as a medium-size symmetric object (MSO). The object harbours an AGN. It is also found as an X-ray source in the XMM-Newton EPIC (European Photon Imaging Cameras) instrument serendipitous source catalogue. Rather than being a dark lens, J1218+2953 is most likely a massive, heavily obscured galaxy in which the nuclear activity is currently in an early evolutionary stage.

Abstract Copyright:

Journal keyword(s): radio continuum: galaxies - galaxies: active - galaxies: individual: FIRST J121839.7+295325 - techniques: interferometric - gravitational lensing: strong

CDS comments: Figs. : components are not in Simbad.

Simbad objects: 11

goto Full paper

goto View the reference in ADS

Number of rows : 11

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 CLASS B0128+437 Rad 01 31 +44.0           ~ 55 0
2 ICRF J092703.0+390220 Sy1 09 27 03.0139516273 +39 02 20.847968628   17.17 17.00 16.486   ~ 932 1
3 7C 1007+5559 QSO 10 11 12.2671 +55 44 47.572     21.02     ~ 12 1
4 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 797 1
5 [KGH2007] 6 G 12 17 51 +14 46.5           ~ 44 0
6 6C 121520+302351 BLL 12 17 52.0819140772 +30 07 00.636792927   16.07 15.62 13.47   ~ 406 1
7 NGC 4253 Sy1 12 18 26.5155239433 +29 48 46.518670434   14.34 13.57     ~ 931 1
8 NVSS J121839+295326 X 12 18 39.7 +29 53 25           ~ 4 1
9 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 763 2
10 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5825 0
11 QSO B1404+286 BLL 14 07 00.3933203928 +28 27 14.695133019   16.13 15.35 10.29   ~ 675 2

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2010A&A...513A..18F and select 'bookmark this link' or equivalent in the popup menu


2020.07.14-22:49:08

© Université de Strasbourg/CNRS

    • Contact