A Search for Proper Motion in the Parsec-Scale Radio Jet Components of High-Energy Peaked BL Lacs

Details A Search for Proper Motion in the Parsec-Scale Radio Jet Components of High-Energy Peaked BL Lacs A Search for Proper Motion in the Parsec-Scale Radio Jet Components of High-Energy Peaked BL Lacs

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aas...201.8609p&link_type=abstract

American Astronomical Society, 201st AAS Meeting, #86.09; Bulletin of the American Astronomical Society, Vol. 34, p.1246

Astronomy and Astrophysics

Astronomy

Scientific paper

In the standard unified model, BL Lacs are believed to be low-luminosity FR-1 radio galaxies viewed at small angles to their jet axes. However, the relationship between high-energy peaked BL Lacs (HBLs) and low-energy peaked BL Lacs (LBLs) is still unclear. Studying BL Lacs with VLBI techniques is promising because the properties of their parsec-scale jets are strongly dependent on the orientation and Lorentz factor of the jet. Due to their relative radio-faintness, HBLs have not been as well studied on VLBI scales as LBLs. We present results of a 2-epoch VLBI survey of 12 HBLs, the first search for proper motion in the parsec-scale radio jets of HBLs. Based on the measured positions of jet components in two epochs, velocities are consistent with no motion, but we are able to place upper limits of approximately 2c on the apparent motions. We present these results and their implications for the HBL jet orientation angles and Lorentz factors, important parameters in BL Lac unification models. This research was carried out as part of the NSF's Research Experience for Undergraduates (REU) program at the NRAO in Socorro, New Mexico.

Affiliated with

Also associated with

No associations

Rating

A Search for Proper Motion in the Parsec-Scale Radio Jet Components of High-Energy Peaked BL Lacs 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 A Search for Proper Motion in the Parsec-Scale Radio Jet Components of High-Energy Peaked BL Lacs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Search for Proper Motion in the Parsec-Scale Radio Jet Components of High-Energy Peaked BL Lacs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1890763