Multi-wavelength modeling of the high-redshift BL Lac Object 3FGL J2146.6-1344
Abstract
High synchrotron peaked (HSP) BL Lacs (with synchrotron peak frequency above 1015 Hz) are some of the most powerful accelerators in the Universe. At high redshifts (z > 1), they challenge our understanding of the blazar evolution models as well as prove to be a crucial tool for cosmological measurements of the extragalactic background light. Here, we studied the properties of a high-redshift BL Lac object, 3FGL J2146.6-1344, detected to be at z = 1.34. Its SED reveals that the source, despite being classified as an HSP BL Lac object, is likely a "masquerading BL Lac", a class of objects that comprises of FSRQs appearing as disguised BL Lacs. As the recent detection of high-energy neutrinos by IceCube in the direction of TXS 0506+056 shows, these masquerading BL Lacs may be responsible for the astrophysical IceCube neutrino flux.
- Publication:
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American Astronomical Society Meeting Abstracts #235
- Pub Date:
- January 2020
- Bibcode:
- 2020AAS...23540502R