Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey
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 pr...
| Main Authors: | , , , , , , , , |
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| Format: | Journal article |
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2011
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| _version_ | 1797076415100747776 |
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| author | Linford, J Taylor, G Romani, R Healey, SE Helmboldt, J Readhead, A Reeves, R Richards, J Cotter, G |
| author_facet | Linford, J Taylor, G Romani, R Healey, SE Helmboldt, J Readhead, A Reeves, R Richards, J Cotter, G |
| author_sort | Linford, J |
| collection | OXFORD |
| description | 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 γ-ray emission. At lower flux levels, radio flux density does not directly correlate with γ-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 γ-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 γ-ray loud FSRQs are fundamentally different from the γ-ray quiet FSRQs. Strong polarization at the base of the jet appears to be a signature for γ-ray loud AGNs. © 2011. The American Astronomical Society. All rights reserved. Printedin the U.S.A. |
| first_indexed | 2024-03-07T00:03:25Z |
| format | Journal article |
| id | oxford-uuid:76bed047-88e1-49b0-842c-79ce25c846d6 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T00:03:25Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | oxford-uuid:76bed047-88e1-49b0-842c-79ce25c846d62022-03-26T20:18:18ZCharacteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry SurveyJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:76bed047-88e1-49b0-842c-79ce25c846d6Symplectic Elements at Oxford2011Linford, JTaylor, GRomani, RHealey, SEHelmboldt, JReadhead, AReeves, RRichards, JCotter, GThe 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 γ-ray emission. At lower flux levels, radio flux density does not directly correlate with γ-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 γ-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 γ-ray loud FSRQs are fundamentally different from the γ-ray quiet FSRQs. Strong polarization at the base of the jet appears to be a signature for γ-ray loud AGNs. © 2011. The American Astronomical Society. All rights reserved. Printedin the U.S.A. |
| spellingShingle | Linford, J Taylor, G Romani, R Healey, SE Helmboldt, J Readhead, A Reeves, R Richards, J Cotter, G Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey |
| title | Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey |
| title_full | Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey |
| title_fullStr | Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey |
| title_full_unstemmed | Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey |
| title_short | Characteristics of Gamma-ray loud blazars in the VLBA Imaging and Polarimetry Survey |
| title_sort | characteristics of gamma ray loud blazars in the vlba imaging and polarimetry survey |
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