The Structure of the Strongly Lensed Gamma-ray Source B2 0218+35
Autor: | Adi Zitrin, Margaret J. Geller, Anna Barnacka, Ian P. Dell'Antonio |
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Rok vydání: | 2015 |
Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
media_common.quotation_subject Astrophysics::High Energy Astrophysical Phenomena Strong gravitational lensing FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences law.invention Radio telescope symbols.namesake law 0103 physical sciences Angular resolution Planck 010303 astronomy & astrophysics media_common Physics High Energy Astrophysical Phenomena (astro-ph.HE) 010308 nuclear & particles physics Astronomy and Astrophysics Universe Space and Planetary Science Temporal resolution symbols Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics Hubble's law Flare |
DOI: | 10.48550/arxiv.1511.02891 |
Popis: | Strong gravitational lensing is a powerful tool for resolving the high energy universe. We combine the temporal resolution of Fermi-LAT, the angular resolution of radio telescopes, and the independently and precisely known Hubble constant from Planck, to resolve the spatial origin of gamma-ray flares in the strongly lensed source B2 0218+35. The lensing model achieves 1 milliarcsecond spatial resolution of the source at gamma-ray energies. The data imply that the gamma-ray flaring sites are separate from the radio core: the bright gamma-ray flare (MJD: 56160 - 56280) occurred $51\pm8$ pc from the 15 GHz radio core, toward the central engine. This displacement is significant at the $\sim3\sigma$ level, and is limited primarily by the precision of the Hubble constant. B2 0218+35 is the first source where the position of the gamma-ray emitting region relative to the radio core can be resolved. We discuss the potential of an ensemble of strongly lensed high energy sources for elucidating the physics of distant variable sources based on data from Chandra and SKA. Comment: accepted for publication, ApJ |
Databáze: | OpenAIRE |
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