2015A&A...579A.109K


Query : 2015A&A...579A.109K

2015A&A...579A.109K - Astronomy and Astrophysics, volume 579A, 109-109 (2015/7-1)

A VLBI survey of compact broad absorption line quasars with balnicity index BI > 0.

KUNERT-BAJRASZEWSKA M., CEGLOWSKI M., KATARZYNSKI K. and ROSKOWINSKI C.

Abstract (from CDS):

Outflows manifest as broad absorption lines (BALs) in the quasars spectra. Although outflows are one of the most common astrophysical processes in the Universe, the BAL quasars are rare. Radio emission is another tool that can help to understand the phenomenon of BAL quasars. The aim of this paper is to study their orientation and age by very long baseline interferometry (VLBI) imaging and radio-loudness parameter distribution. We performed high resolution radio observations of a new sample of ten BAL quasars using both the Very Long Baseline Array (VLBA) and the European VLBI Network (EVN) at 5GHz. All the selected sources have balnicity indices (BI) more than 0 and radio flux densities less than 80mJy at 1.4GHz. They are very compact with linear sizes of the order of a few tens of parsecs and radio luminosities at 1.4GHz above the FRI-FRII luminosity threshold. Most of the observed objects have been resolved at 5GHz showing one-sided, probably core-jet structures, typical for quasars. We discuss in detail their age and orientation based on the radio observations. We then used the largest available sample of BAL quasars to study the relationships between the radio and optical properties in these objects. We found that (1) the strongest absorption (high values of the balnicity index BI) is connected with the lower values of the radio-loudness parameter, logRI<1.5, and thus probably with large viewing angles; (2) the large span of the BI values in each bin of the radio-loudness parameter indicates that the orientation is only one of the factors influencing the measured absorption; (3) most of the radio-loud BAL quasars are compact, low luminosity objects with a wide range of jet power (although the highest values of BI seem to be associated with the lower values of jet power). In addition, we suggest that the short lifetime postulated for some compact active galactic nuclei could also explain the scarcity of the large-scale radio sources among BAL quasars.

Abstract Copyright:

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

Simbad objects: 29

goto Full paper

goto View the reference in ADS

Number of rows : 29
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 SDSS J004022.40+005939.6 QSO 00 40 22.4062897209 +00 59 39.697576724   20.65 20.06     ~ 23 0
2 SDSS J004444.06+001303.6 QSO 00 44 44.0666315025 +00 13 03.547878463   20.83 20.32     ~ 22 0
3 [VV2006] J075310.4+210244 QSO 07 53 10.4236017475 +21 02 44.395608736   20.52 19.91     ~ 31 0
4 QSO J0811+5007 QSO 08 11 02.9134445507 +50 07 24.306040587   19.65 19.39     ~ 42 0
5 FIRST J082817.2+371853 QSO 08 28 17.2579683210 +37 18 53.763134670   21.94 20.90     ~ 18 0
6 [VV2006] J084224.4+063116 QSO 08 42 24.3777354940 +06 31 16.797138265   20.88 20.55     ~ 25 0
7 [VV2006] J085641.5+424254 QSO 08 56 41.5653582201 +42 42 53.996218984   19.47 19.07     ~ 31 0
8 [VV2006] J090552.5+025931 QSO 09 05 52.4049204285 +02 59 31.509624988   17.74 17.34     ~ 32 0
9 SDSS J093348.37+313335.2 QSO 09 33 48.3713808931 +31 33 35.251215450   20.38 19.87     ~ 18 0
10 [VV2006] J093804.5+120011 QSO 09 38 04.5219099614 +12 00 11.433798950   19.60 19.12     ~ 23 0
11 [VV2006] J103424.4+493221 QSO 10 34 24.4202482777 +49 32 20.979957023   20.40 20.07     ~ 17 0
12 [VV2006] J104059.8+055524 QSO 10 40 59.7972009086 +05 55 24.456593243   20.33 19.87     ~ 29 0
13 2MASS J10431988+1327488 QSO 10 43 19.8856188162 +13 27 48.682593485   20.04 19.26     ~ 13 0
14 [VV2006] J104452.4+104005 QSO 10 44 52.4158362862 +10 40 05.960243877   18.45 18.12     ~ 24 0
15 7C 104545.79+351316.00 QSO 10 48 34.2444010963 +34 57 24.883240735           ~ 51 1
16 QSO J1122+3124 QSO 11 22 20.4521255284 +31 24 41.004228021   18.21 17.75     ~ 27 0
17 SDSS J133002.50+510303.6 QSO 13 30 02.5072393488 +51 03 03.614890980   19.45 19.23     ~ 19 0
18 [VV2006] J133325.1+472935 QSO 13 33 25.0729100276 +47 29 35.381036097   19.15 18.88     ~ 25 1
19 [VV2006] J140126.2+520835 QSO 14 01 26.1471421377 +52 08 34.601001007   18.80 18.57     ~ 26 0
20 [VV2006] J144136.5+632519 QSO 14 41 36.5430238730 +63 25 19.386919009   19.20 18.99     ~ 25 0
21 [VV2006] J144434.8+003305 QSO 14 44 34.8059892919 +00 33 05.373438748   19.60 19.30     ~ 33 0
22 [VV2006] J145506.8+354749 QSO 14 55 06.7673295235 +35 47 49.554694633   21.11 20.83     ~ 19 0
23 7C 145637.50+575640.00 QSO 14 57 56.2607506779 +57 44 46.875173242   19.96 19.68     ~ 22 1
24 QSO J1459+4931 QSO 14 59 26.3297403539 +49 31 36.835012347   20.41 19.59 18.71   ~ 28 0
25 QSO J1556+3517 QSO 15 56 33.7770938780 +35 17 57.387199648   21.39 20.68 19.07   ~ 81 1
26 SDSS J170558.99+243532.6 QSO 17 05 59.0080575361 +24 35 32.685584492   20.56 20.13     ~ 16 0
27 QSO J2107-0620 QSO 21 07 57.6703577106 -06 20 10.626078411   17.78 17.45     ~ 39 0
28 QSO J2238+0016 Sy1 22 38 43.5709169615 +00 16 47.952179312   20.65 19.74     ~ 37 0
29 [VV2006] J224800.7-090745 QSO 22 48 00.7001684724 -09 07 44.841193832   20.13 19.63     ~ 21 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...579A.109K and select 'bookmark this link' or equivalent in the popup menu


2021.07.27-08:13:03

© Université de Strasbourg/CNRS

    • Contact