SIMBAD references

1999MNRAS.307..725G - Mon. Not. R. Astron. Soc., 307, 725-736 (1999/August-2)

The lambda = 6cm VLBI polarization structure of nine BL Lacertae objects.


Abstract (from CDS):

VLBI total intensity (I) and linear polarization (P) images at λ=6cm have been obtained for nine radio-bright BL Lacertae objects. These are the first VLBI P images for these sources, and, in a number of cases, the first I images as well. They confirm the previously noted tendency for the jet magnetic fields of BL Lacertae objects to be transverse to the local jet direction, but also provide new evidence that a sizeable minority of BL Lacertae objects have VLBI jet components with longitudinal magnetic fields. In addition, two sources have VLBI jet components in which the direction of the electric vector χ bears no obvious relation to the apparent local jet direction; the origin of these arbitrary χ offsets is unclear. A new tentative superluminal speed of β=6.3h–1 has been determined for 0828+493; tentative speeds for two knots in 1418+546 are β=4.3 and 2.5h–1. This work is part of an ongoing programme to determine the VLBI I and P structure of all 34 sources in the 1-Jy sample of northern BL Lacertae objects defined by Kühr & Schmidt.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): polarization - BL Lacertae objects: general - radio continuum: galaxies MNRAS..88..115

Status at CDS:  

Simbad objects: 9

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