Limits to Quantum Gravity Effects on Energy Dependence of the Speed of Light from Observations of TeV Flares in Active Galaxies

Biller, S. D.; Breslin, A. C.; Buckley, J. H.; Catanese, M.; Carson, M.; Carter‐Lewis, D. A.; Cawley, M. F.; Fegan, D. J.; Finley, J. P.; Gaidos, J. A.; Hillas, A. M.; Krennrich, F.; Lamb, R. C.; Lessard, R. W.; Masterson, C.; McEnery, J. E.; McKernan, Barry; Moriarty, P.; Quinn, J.; Rose, H. J.; Samuelson, F. W.; Sembroski, G. H.; Skelton, P.L.I.; Weekes, T. C.

doi:10.1103/physrevlett.83.2108

Cited by 257 publications

(308 citation statements)

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“…[8]. In this way, consistency requires that the phase of the Green function (39) reduces to ω (r −n · r ′ ).…”

Section: Discussionmentioning

confidence: 99%

“…On the phenomenological side the main emphasis has been set on the determination of observational bounds for the LIV parameters appearing in the MDR. A partial list of references is given in [8,9]. Additionally, effective field theories, not necessarily related to quantum gravity, have been put forward to analyze the possible consequences of LIV [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Synchrotron radiation in Myers–Pospelov effective electrodynamics

Montemayor

Urrutia

2005

Physics Letters B

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In the framework of the classical effective Lorentz invariance violating (LIV) model of MyersPospelov, we present a complete calculation of the synchrotron radiation produced by a circularly moving charge in the rest frame of the model. Within the full far-field approximation we compute exact expressions for the electric and magnetic fields, the angular distribution of the power spectrum and the total emitted power in the m-th harmonic. We also perform an expansion of the latter quantity in terms of the electromagnetic LIV parameter and calculate the average degree of circular polarization to first order in such a parameter. In both cases we find, under adequate circumstances, the appearance of rather unexpected and large amplifying factors, which go together with the otherwise negligible naive expansion parameter. This opens up the possibility of selecting astrophysical sources where these amplifying factors are important, to explore further constraints imposed upon the LIV parameters by synchrotron radiation measurements.

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“…[8]. In this way, consistency requires that the phase of the Green function (39) reduces to ω (r −n · r ′ ).…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synchrotron radiation in Myers–Pospelov effective electrodynamics

Montemayor

Urrutia

2005

Physics Letters B

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“…Over the last decade the search for experimental manifestations of Planck-scale effects has been reenergized by the realization that certain types of observations in astrophysics do provide indirect access to certain Planck-scale effects [2,3,4,5,6,7]. Several authors have already argued that cosmological observations may soon also help in the efforts of searching for hints on the realm of quantum gravity.…”

Section: Introductionmentioning

confidence: 99%

A constraint on Planck-scale modifications to electrodynamics with CMB polarization data

Gubitosi

Pagano

Amelino‐Camelia

et al. 2009

J. Cosmol. Astropart. Phys.

100

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Abstract. We show that the Cosmic Microwave Background (CMB) polarization data gathered by the BOOMERanG 2003 flight and WMAP provide an opportunity to investigate in-vacuo birefringence, of a type expected in some quantum pictures of space-time, with a sensitivity that extends even beyond the desired Planck-scale energy. In order to render this constraint more transparent we rely on a well studied phenomenological model of quantumgravity-induced birefringence, in which one easily establishes that effects introduced at the Planck scale would amount to values of a dimensionless parameter, denoted by ξ, with respect to the Planck energy which are roughly of order 1. By combining BOOMERanG and WMAP data we estimate ξ ≃ −0.110 ± 0.076 at the 68% c.l. Moreover, we forecast on the sensitivity to ξ achievable by future CMB polarization experiments (PLANCK, Spider, EPIC), which, in the absence of systematics, will be at the 1-σ confidence of 8.5 × 10 −4 (PLANCK), 6.1 × 10 −3 (Spider), and 1.0 × 10 −5 (EPIC) respectively. The cosmic variance-limited sensitivity from CMB is 6.1 × 10 −6 . † giulia

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“…Among the others the large distance propagation of photons with energy dependent velocity [8,9] and modifications induced in the standard synchrotron radiation emission process have been considered to put limits on possible Lorentz Invariance (LI) breaking [10,11,12].…”

Section: From Quantum Gravity To Lorentz Invariance Breakingmentioning

confidence: 99%