Modeling spectral lags in active galactic nucleus flares in the context of Lorentz invariance violation searches
| Autor: | Bolmont Julien, Sol Hélène, Perennes Cédric |
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| Přispěvatelé: | Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Univers et Théories (LUTH (UMR_8102)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut national des sciences de l'Univers (INSU - CNRS), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Active galactic nucleus
Astrophysics::High Energy Astrophysical Phenomena non-thermal -galaxies active -BL Lacertae objects FOS: Physical sciences Astrophysics Lorentz covariance 01 natural sciences law.invention general -astroparticle physics law 0103 physical sciences 010306 general physics Blazar 010303 astronomy & astrophysics Physics [PHYS]Physics [physics] High Energy Astrophysical Phenomena (astro-ph.HE) [SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] Computer Science::Information Retrieval [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE] Astronomy and Astrophysics Cherenkov Telescope Array Redshift Particle acceleration radiation mechanisms Space and Planetary Science [SDU]Sciences of the Universe [physics] Astrophysics - High Energy Astrophysical Phenomena Phenomenology (particle physics) Flare |
| Popis: | High-energy photons emitted by flaring active galactic nuclei (AGNs) have been used for many years to constrain modified dispersion relations in vacuum encountered in the context of quantum gravity phenomenology. In such studies, done in the GeV-TeV range, energy-dependent delays (spectral lags) are searched for, usually neglecting any source-intrinsic time delay. With the aim being to distinguish lorentz invariance violation (LIV) effects from lags generated at the sources themselves, a detailed investigation into intrinsic spectral lags in flaring AGNs above 100 GeV is presented in the frame of synchrotron-self-Compton (SSC) scenarios for their very-high-energy (VHE) emission. A simple model of VHE flares in blazars is proposed, allowing to explore the influence of the main physical parameters describing the emitting zones on intrinsic delays. For typical conditions expected in TeV blazars, significant intrinsic lags are obtained, which can dominate over LIV effects, especially at low redshifts, and should therefore be carefully disentangled from any extrinsic lags. Moreover, two main regimes are identified with characteristic spectral lags, corresponding to long-lasting and fast particle acceleration. Such intrinsic spectral lags should be detected with new-generation instruments at VHE such as the Cherenkov Telescope Array which begins operation in a few years. This will provide original constraints on AGN flare models and open a new era for LIV searches in the photon sector. Comment: 14 pages, 13 figures, 1 appendix. Accepted by A&A |
| Databáze: | OpenAIRE |
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