The University of Michigan radio astronomy data base. I - Structure function analysis and the relation between BL Lacertae objects and quasi-stellar objects

Details The University of Michigan radio astronomy data base. I - Structure function analysis and the relation between BL Lacertae objects and quasi-stellar objects The University of Michigan radio astronomy data base. I - Structure function analysis and the relation between BL Lacertae objects and quasi-stellar objects

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396..469h&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 396, no. 2, Sept. 10, 1992, p. 469-486.

Astronomy and Astrophysics

Astronomy

148

Bl Lacertae Objects, Data Bases, Quasars, Radio Astronomy, Magnetic Field Configurations, Radio Jets (Astronomy), Radio Spectra, Red Shift, Very Long Base Interferometry

Scientific paper

Results are presented of a structure function analysis on a well-observed group of variable extragalactic sources monitored in total and polarized flux in the centimeter waveband since 1965. The analysis provides a good estimate of characteristic time scales of variability for the two types of object: there is a very broad distribution of time scales for both BL Lac objects and QSOs, with mean time scales of 1.95 and 2.35 yr, respectively. A structure function analysis applied to the Stokes parameters in a frame of reference related to the VLBI jet structure suggests that variations of the polarized flux occur in an orientation related to the underlying jet direction. The derived time scales for Q and U variations and the relative amplitude of these variations are interpreted in terms of emission from shocked jets with a well-defined magnetic field direction, contaminated by a significant but randomly polarized core emission for BL Lacs, and in similar terms, but with a magnetic field less strongly correlated with the jet direction, and a weakly polarized core, for QSOs.

Affiliated with

Also associated with

No associations

Rating

The University of Michigan radio astronomy data base. I - Structure function analysis and the relation between BL Lacertae objects and quasi-stellar objects does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The University of Michigan radio astronomy data base. I - Structure function analysis and the relation between BL Lacertae objects and quasi-stellar objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The University of Michigan radio astronomy data base. I - Structure function analysis and the relation between BL Lacertae objects and quasi-stellar objects will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1765843