The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon

Fairbairn, Malcolm; Nilsson, Nils Åke; Ellis, John; Hinton, J. A.

doi:10.1088/1475-7516/2014/06/005

Cited by 45 publications

(66 citation statements)

References 56 publications

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“…Murase et al 2012a). Opportunity would arise for tests of non standard physics such as violations of the Lorentz invariance (Fairbairn et al 2014) or the speculated existence of axion-like particles (Meyer & Conrad 2014), once the number of these multi-TeV photon factories should become greater than now. Therefore EHBL will be very interesting targets for challenging hot topics in fundamental physics, both with the ASTRI/CTA MiniArray (improving the current H.E.S.S.…”

Section: Discussionmentioning

confidence: 99%

An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?

Bonnoli

Tavecchio

Ghisellini

et al. 2015

Monthly Notices of the Royal Astronomical Society

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High energy observations of extreme BL Lac objects, such as 1ES 0229+200 or 1ES 0347-121, recently focused interest both for blazar and jet physics and for the implication on the extragalactic background light and intergalactic magnetic field estimate. However, the number of these extreme highly peaked BL Lac objects (EHBL) is still rather small. Aiming at increase their number, we selected a group of EHBL candidates starting from the BL Lac sample of Plotkin et al. (2011), considering those undetected (or only barely detected) by the Large Area Telescope onboard Fermi and characterized by a high X-ray vs. radio flux ratio. We assembled the multi-wavelength spectral energy distribution of the resulting 9 sources, profiting of publicly available archival observations performed by Swift, Galex, and Fermi satellites, confirming their nature. Through a simple one-zone synchrotron self-Compton model we estimate the expected VHE flux, finding that in the majority of cases it is within the reach of present generation of Cherenkov arrays or of the forthcoming Cherenkov Telescope Array (CTA).

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Section: Discussionmentioning

confidence: 99%

An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?

Bonnoli

Tavecchio

Ghisellini

et al. 2015

Monthly Notices of the Royal Astronomical Society

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“…In the literature, expressions for the optical depth, derived with two alternative assumptions, are given by Jacob & Piran (2008) and Fairbairn et al (2014). In both works, the modified dispersion relation that is given in Eq.…”

Section: Gamma-ray Absorption With LIVmentioning

confidence: 99%

“…The treatments of Jacob & Piran (2008) and Fairbairn et al (2014) differ from the assumptions made to further derive the expression for the optical depth τ γγ (see the Appendix for more details). Jacob & Piran (2008) assume the standard formula (e.g., Dweck & Krennrich 2012) and that the functional form of the cross-section, which in the standard case can be expressed as a function of the ratio / min , still holds at energies where LIV effects begin to be significant.…”

Section: Gamma-ray Absorption With LIVmentioning

confidence: 99%

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On the detectability of Lorentz invariance violation through anomalies in the multi-TeVγ-ray spectra of blazars

Tavecchio

Bonnoli

2015

A&A

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Context. Cosmic opacity for very high energy γ rays (E > 10 TeV) that result from the interaction with the extragalactic background light can be strongly reduced. This is because of possible Lorentz-violating terms in the dispersion relations for particles expected for several versions of quantum gravity theories. Aims. We discuss the possibility of using very high-energy observations of blazars to detect anomalies in the cosmic opacity that are induced by Lorentz invariance violation (LIV), taking the possibility of using extreme BL Lacertae (BL Lac) objects into particular consideration, as well as the bright and nearby BL Lac Mkn 501. Methods. We derive the modified expression for the optical depth of γ rays by also taking redshift dependence into consideration and, by applying this, we derive the expected high-energy spectrum above 10 TeV of Mkn 501, in high and low states, and of the extreme BL Lac 1ES 0229+200. Results. Along with the nearby and well studied BL Lac Mkn 501 especially in high state, other suitable targets are extreme BL Lac objects, characterized by quite hard TeV intrinsic spectra which probably extend at the energies relevant when detecting LIV features.

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“…Astroparticle physics has been proposed as an appropriate test environment for possible Lorentz Invariance Violation (LIV) given the large energy of the particles, the large propagation distances, the accumulation of small interaction effects and recently the precision of the measurements (Liberati & Maccione (2009) ;Stecker & Scully (2005; Amelino-Camelia et al (1998); Jacobson et al (2003); Galaverni & Sigl (2008a,b); Xu & Ma (2016); Chang et al (2016); Ellis & Mavromatos (2013); The MAGIC Collaboration (2008); Ellis et al (2006Ellis et al ( , 2008; Fairbairn et al (2014); Biteau & Williams (2015); Tavecchio & Bonnoli (2016); Rubtsov et al (2017)). …”

Section: Introductionmentioning

confidence: 99%

Limits on the Lorentz Invariance Violation from UHECR Astrophysics

Lang

Martínez-Huerta

Souza

2018

ApJ

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In this paper, Lorentz Invariance Violation (LIV) is introduced in the calculations of photon propagation in the Universe. LIV is considered in the photon sector and the mean free path of the γγ → e + e − interaction is calculated. The corresponding photon horizon including LIV effects is used to predict major changes in the propagation of photons with energy above 10 18 eV. The flux of GZK photons on Earth considering LIV is calculated for several source models of ultra-high energy cosmic ray (UHECR). The predicted flux of GZK gamma-rays is compared to the new upper limits on the photon flux obtained by the Pierre Auger Observatory in order to impose upper limits on the LIV coefficients of order n = 0, 1 and 2. The limits on the LIV coefficients derived here are more realistic than previous works and in some cases more restrictive. The analysis resulted in LIV upper limits in the photon sector of δ limit γ,0

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The CTA sensitivity to Lorentz-violating effects on the gamma-ray horizon

Cited by 45 publications

References 56 publications

An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?

An emerging population of BL Lacs with extreme properties: towards a class of EBL and cosmic magnetic field probes?

On the detectability of Lorentz invariance violation through anomalies in the multi-TeVγ-ray spectra of blazars

Limits on the Lorentz Invariance Violation from UHECR Astrophysics

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