Abstract
We have investigated the differences in apparent opening angles between
the parsec-scale jets of the active galactic nuclei (AGN) detected by
the Fermi Large Area Telescope (LAT) during its first 24 months of
operations and those of non-LAT-detected AGN. We used 15.4 GHz VLBA
observations of 215 sources from the 2 cm VLBA MOJAVE program. The
apparent opening angles were determined by analyzing transverse jet
profiles from the data in the image plane by using stacked images
constructed from all available MOJAVE epochs for a given source. We
confirm our earlier result based on the first three months of scientific
operations of the LAT. The apparent opening angles of \gamma-ray bright
AGN are preferentially larger than those of \gamma-ray weak sources,
suggesting smaller viewing angles to the \gamma-ray bright AGN.
Intrinsic opening angles for BL Lacs are wider than those in quasars.
| Original language | English |
|---|---|
| Title of host publication | Fermi & Jansky Proceedings - eConf |
| Number of pages | 4 |
| Volume | C1111101 |
| Publication status | Published - 2012 |
| MoE publication type | A4 Conference publication |
Keywords
- Astrophysics - High Energy Astrophysical Phenomena