Exploring the Magnetic Field Configuration in BL Lac Using GMVA
| Autor: | Alan P. Marscher, J. Hodgson, Lars Fuhramnn, Svetlana G. Jorstad, Thomas P. Krichbaum, Bindu Rani, Anton Zensus, Shoko Koyama |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
jets
Active galactic nucleus 010504 meteorology & atmospheric sciences high-resolution VLBI lcsh:Astronomy Astrophysics::High Energy Astrophysical Phenomena magnetic field Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences active galaxies BL Lacertae object: BL Lac GMVA polarization lcsh:QB1-991 0103 physical sciences Very-long-baseline interferometry Blazar 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics 0105 earth and related environmental sciences Physics Solar mass Supermassive black hole Astronomy Astronomy and Astrophysics Polarization (waves) Redshift BL Lac object |
| Zdroj: | Galaxies; Volume 4; Issue 3; Pages: 32 Galaxies, Vol 4, Iss 3, p 32 (2016) |
| ISSN: | 2075-4434 |
| DOI: | 10.3390/galaxies4030032 |
| Popis: | The high radio frequency polarization imaging of non-thermal emission from active galactic nuclei (AGN) is a direct way to probe the magnetic field strength and structure in the immediate vicinity of supermassive black holes (SMBHs) and is crucial in testing the jet-launching scenario. To explore the the magnetic field configuration at the base of jets in blazars, we took advantage of the full polarization capabilities of the Global Millimeter VLBI Array (GMVA). With an angular resolution of ∼50 micro-arcseconds (μas) at 86 GHz, one could resolve scales up to ∼450 gravitational radii (for a 10 9 solar mass black hole at a redshift of 0.1). We present here the preliminary results of our study on the blazar BL Lac. Our results suggest that on sub-mas scales the core and the central jet of BL Lac are significantly polarized with two distinct regions of polarized intensity. We also noted a great morphological similarity between the 7 mm/3 mm VLBI images at very similar angular resolution. |
| Databáze: | OpenAIRE |
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