| タイトル | Characteristics of Gamma-Ray Loud Blazars in the VLBA Imaging and Polarimetry Survey |
| 著者（英） | Richards, J. L.; Reeves, R.; Helmboldt, J. F.; Readhead, A. C.; Cotter, G.; Healey, S. E.; Romani, R. W.; Taylor, G. B.; Linford, J. D. |
| 著者所属（英） | New Mexico Univ. |
| 発行日 | 2010-01-01 |
| 言語 | eng |
| 内容記述 | The radio properties of blazars detected by the Large Area Telescope (LAT) on board the Fermi Gamma-ray Space Telescope have been observed as part of the VLBA Imaging and Polarimetry Survey. This large, flux-limited sample of active galactic nuclei (AGNs) provides insights into the mechanism that produces strong gamma-ray emission. At lower flux levels, radio flux density does not directly correlate with gamma-ray flux. We find that the LAT-detected BL Lac objects tend to be similar to the non-LAT BL Lac objects, but that the LAT-detected FSRQs are often significantly different from the non-LAT FSRQs. The differences between the gamma-ray loud and quiet FSRQS can be explained by Doppler boosting; these objects appear to require larger Doppler factors than those of the BL Lac objects. It is possible that the gamma-ray loud FSRQs are fundamentally different from the gamma-ray quiet FSRQs. Strong polarization at the base of the jet appears to be a signature for gamma-ray loud AGNs. |
| NASA分類 | Astronomy |
| レポートNO | AD-A554848 |
| 権利 | Copyright |
|
