2008MNRAS.384..230K


Query : 2008MNRAS.384..230K

2008MNRAS.384..230K - Mon. Not. R. Astron. Soc., 384, 230-250 (2008/February-2)

Parsec-scale magnetic field structures in HEAO-1 BL Lacs.

KHARB P., GABUZDA D. and SHASTRI P.

Abstract (from CDS):

We present very long baseline interferometry polarization images of an X-ray-selected sample of BL Lacertae objects belonging to the first HEAO-1 and the ROSAT-Green Bank (RGB) surveys. These are primarily high-energy-peaked BL Lacs (HBLs) and exhibit core-jet radio morphologies on pc scales. They show moderately polarized jet components, similar to those of low-energy-peaked BL Lacs (LBLs). The fractional polarization in the unresolved cores of the HBLs is, on average, lower than in the LBLs, while the fractional polarizations in the pc-scale jets of HBLs and LBLs are comparable. However, a difference is observed in the orientation of the inferred jet magnetic fields - while LBL jets are well known to preferentially exhibit transverse magnetic fields, the HBL jets tend to display longitudinal magnetic fields. Although a `spine-sheath' jet velocity structure, along with larger viewing angles for HBLs could produce the observed magnetic field configuration, differences in other properties of LBLs and HBLs, such as their total radio power, cannot be fully reconciled with the different-angle scenario alone. Instead it appears that LBLs and HBLs differ intrinsically, perhaps in the spin rates of their central black holes.

Abstract Copyright: © 2008 The Authors

Journal keyword(s): polarization - BL Lacertae objects: general

Simbad objects: 23

goto Full paper

goto View the references in ADS

Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3805 3
2 QSO B0414+009 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 263 0
3 4C 42.22 BLL 06 56 10.6619011872 +42 37 02.759080584   15.0 16.90 11.1   ~ 64 1
4 6C 070609+591309 BLL 07 10 30.0683697888 +59 08 20.371772544   17.38 16.52 15.1   ~ 202 2
5 4C 54.15 BLL 07 53 01.3847860272 +53 52 59.640135276   18.5   16.77   ~ 138 1
6 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 442 2
7 QSO J0854+2006 BLL 08 54 48.8749846272 +20 06 30.639583620   15.91 15.43 15.56   ~ 2190 1
8 6C 092554+502611 BLL 09 29 15.4401569832 +50 13 35.990913000   17.18 16.80 15.94   ~ 127 2
9 6C 101157+494057 BLL 10 15 04.1396533776 +49 26 00.706055496   16.56 16.15 14.58   ~ 331 2
10 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2540 1
11 6C 113337+702604 BLL 11 36 26.4090783600 +70 09 27.309071232   15.16 14.49 10.51   ~ 339 1
12 7C 1147+2434 BLL 11 50 19.2122083392 +24 17 53.834712576   16.26 15.74 15.80   ~ 260 1
13 Ton 605 HB* 12 16 53.6748432768 +30 04 08.692883544   16.110 15.98     B 221 0
14 6C 121520+302351 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   ~ 438 1
15 ICRF J123014.0+251807 BLL 12 30 14.0893292232 +25 18 07.136022996   15.6 14.5 14.78   ~ 130 1
16 QSO B1235+632 BLL 12 37 39.0753390528 +62 58 42.801146328   18.89 18.25 17   ~ 103 0
17 QSO B1404+286 BLL 14 07 00.3941769384 +28 27 14.692128372   16.13 15.35 10.29   ~ 729 2
18 QSO B1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 493 1
19 4C 39.49 BLL 16 53 52.2160772976 +39 45 36.613228860 14.09 14.15 13.29 8.26   ~ 2037 2
20 6C 172704+501607 BLL 17 28 18.6242294352 +50 13 10.469553996   16.55 15.97 12.95   ~ 344 1
21 QSO B1741+196 BLL 17 43 57.8330083440 +19 35 09.018846384     16.80 12.7   ~ 145 1
22 2MASX J17453776+3951309 BLL 17 45 37.7544298992 +39 51 30.936584340     18.30 15.9   ~ 46 1
23 4C 04.77 BLL 22 04 17.6521146096 +04 40 02.027503020   16.20 15.2 10.2   ~ 188 2

To bookmark this query, right click on this link: simbad:objects in 2008MNRAS.384..230K and select 'bookmark this link' or equivalent in the popup menu


2022.09.26-08:16:45

© Université de Strasbourg/CNRS

    • Contact