47
47

Sep 23, 2013
09/13

by
P. G. Tinyakov

texts

#
eye 47

#
favorite 0

#
comment 0

In many supersymmetric extensions of the Standard Model the spectrum of states contains stable non-topological solitons, Q-balls. If formed in the Early Universe in sufficient amounts, Q-balls now contribute to cold dark matter. We discuss their experimental signatures and astrophysical implications.

Source: http://arxiv.org/abs/hep-ph/9806247v1

51
51

Sep 23, 2013
09/13

by
P. G. Tinyakov

texts

#
eye 51

#
favorite 0

#
comment 0

It is argued that if extragalactic magnetic fields are smaller than 2x10^{-12} G the flux of ultra-high energy photons of (a few)x10^{-1} eV cm^{-2}s^{-1}sr^{-1} predicted in the top-down models of UHE CR implies similar flux of the diffuse photons in the energy range 10^{15}-10^{17} eV, which is close to the existing experimental limit.

Source: http://arxiv.org/abs/astro-ph/9909244v1

36
36

Sep 22, 2013
09/13

by
S. L. Dubovsky; P. G. Tinyakov

texts

#
eye 36

#
favorite 0

#
comment 0

The observed clustering of ultra-high energy cosmic rays suggests the existence of a neutral component. The models with violation of Lorentz invariance may explain this component by neutrons becoming stable above some threshold energy E_0. The protons, in turn, may become unstable above some energy E_1>E_0. We calculate the dependence of the threshold energies E_0 and E_1 on the parameters of the model and find E_1/E_0\gsim 1.5. We argue that the characteristic threshold behavior of charged...

Source: http://arxiv.org/abs/astro-ph/0106472v1

45
45

Sep 19, 2013
09/13

by
P. G. Tinyakov; I. I. Tkachev

texts

#
eye 45

#
favorite 0

#
comment 0

We calculate the angular two-point correlation function of ultra-high energy cosmic rays (UHECR) observed by AGASA and Yakutsk experiments. In both data sets, there is a strong signal at highest energies, which is concentrated in the first bin of the size of the angular resolution of the experiment. For the uniform distribution of sources, the probability of a chance clustering is 4 x 10^{-6}. Correlations are absent or not significant at larger angles. This favors the models with compact...

Source: http://arxiv.org/abs/astro-ph/0102101v2

53
53

Sep 19, 2013
09/13

by
Yu. A. Kubyshin; P. G. Tinyakov

texts

#
eye 53

#
favorite 0

#
comment 0

The propagator in the instanton background in the $(- \lambda \phi^{4})$ scalar model in four dimensions is studied.Leading and sub-leading terms of its asymptotics for large momenta and its on-shell double residue are calculated analytically. These results are applied to the analysis of the initial-state and initial-final-state corrections and the calculation of the next-to-leading (propagator) correction to the exponent of the cross section of instanton induced multiparticle scattering...

Source: http://arxiv.org/abs/hep-ph/0010226v1

49
49

Sep 23, 2013
09/13

by
P. G. Tinyakov; I. I. Tkachev

texts

#
eye 49

#
favorite 0

#
comment 0

We express the mean square deflections of the ultra-high energy cosmic rays (UHECR) caused by the random component of the Galactic magnetic field (GMF) in terms of the GMF power spectrum. We use recent measurements of the GMF spectra in several sky patches to estimate the deflections quantitatively. We find that deflections due to the random field constitute $0.03-0.3$ of the deflections which are due to the regular component and depend on the direction on the sky. They are small enough not to...

Source: http://arxiv.org/abs/astro-ph/0411669v2

43
43

Jul 20, 2013
07/13

by
S. L. Dubovsky; P. G. Tinyakov

texts

#
eye 43

#
favorite 0

#
comment 0

We show that the deep expected in the diffuse photon spectrum above the threshold of e+e- pair production, i.e., at energies 10^15 - 10^17 eV, may be absent due to the synchrotron radiation by the electron component of the extragalactic Ultra-High Energy Cosmic Rays (UHE CR) in the Galactic magnetic filed. The mechanism we propose requires small (less than 2x10^-12 G) extragalactic magnetic fields and large fraction of photons in the UHE CR. For a typical photon flux expected in top-down...

Source: http://arxiv.org/abs/astro-ph/9906092v2

57
57

Sep 22, 2013
09/13

by
Yu. A. Kubyshin; P. G. Tinyakov

texts

#
eye 57

#
favorite 0

#
comment 0

The propagator in the instanton background in the -lambda phi^4 scalar model in four dimensions is studied. Leading and sub-leading terms of its asymptotics for large momenta and its on-shell double residue are calculated. These results are applied to the analysis of the initial state and initial-final state corrections and the calculation of the next-to-leading (propagator) correction to the exponent of the cross section of multiparticle scattering processes.

Source: http://arxiv.org/abs/hep-ph/0001156v1

50
50

Sep 19, 2013
09/13

by
D. T. Son; P. G. Tinyakov

texts

#
eye 50

#
favorite 0

#
comment 0

Two-parameter sets of solutions to the classical field equations in the massless $\phi^4$ model and SU(2) gauge theory are found, each solution presumably describing a multi-particle instanton-like transition at high energy. In the limit of small number of initial particles, the probability of the transition is suppressed by $\exp(-2S_0)$, where $S_0$ is the instanton action.

Source: http://arxiv.org/abs/hep-ph/9309332v1

46
46

Sep 19, 2013
09/13

by
A. N. Kuznetsov; P. G. Tinyakov

texts

#
eye 46

#
favorite 0

#
comment 0

The semiclassical formalism for numerical calculation of the rate of tunneling transitions induced by N particles with total energy E of order or higher than the height of the barrier is developed. The formalism is applied to the induced false vacuum decay in the massive four-dimensional $-\lambda\phi^4$ model. The decay rate, as a function of E and N, is calculated numerically in the range $0.4\lsim E/E_{sph}\lsim 3.5$ and $0.25 \lsim N/N_{sph}\lsim 1.0$, where $E_{sph}$ and $N_{sph}$ are the...

Source: http://arxiv.org/abs/hep-ph/9703256v1

40
40

Sep 22, 2013
09/13

by
P. G. Tinyakov; I. I. Tkachev

texts

#
eye 40

#
favorite 0

#
comment 0

We reconstruct the trajectories of ultra-high energy cosmic rays (UHECR) - observed by the AGASA experiment - in the Galactic magnetic field assuming that all particles have the same charge. We then study correlations between the reconstructed events and BL Lacs. The correlations have significance below 10^{-3} in the case of particles with charge +1. In the case of charge -1 the correlations are absent. We interpret this as evidence that protons are present in the flux of UHECR. Observed...

Source: http://arxiv.org/abs/astro-ph/0111305v1

4
4.0

Jun 30, 2018
06/18

by
P. G. Tinyakov; F. R. Urban

texts

#
eye 4

#
favorite 0

#
comment 0

The full-sky multipole coefficients of the ultra-high energy cosmic ray (UHECR) flux have been measured for the first time by the Pierre Auger and Telescope Array collaborations using a joint data set with E > 10 EeV. We calculate these harmonic coefficients in the model where UHECR are protons and sources trace the local matter distribution, and compare our results with observations. We find that the expected power for low multipoles (dipole and quadrupole, in particular) is sytematically...

Topics: High Energy Astrophysical Phenomena, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1411.2486

39
39

Sep 19, 2013
09/13

by
Yu. A. Kubyshin; P. G. Tinyakov

texts

#
eye 39

#
favorite 0

#
comment 0

The cross section of the multiparticle scattering processes in the non-perturbative sector of the scalar -lambda * phi^4 model is studied within the semiclassical approximation. For this purpose the exact formula for the residue of the propagator in the instanton background is derived. The exponent of the cross section is calculated at small energies both analytically and numerically in the leading and next-to-leading orders in energy. The results are in agreement with the numerical...

Source: http://arxiv.org/abs/hep-ph/9812321v2

54
54

Sep 19, 2013
09/13

by
P. G. Tinyakov; I. I. Tkachev

texts

#
eye 54

#
favorite 0

#
comment 0

We calculate angular correlation function between ultra-high energy cosmic rays (UHECR) observed by Yakutsk and AGASA experiments, and most powerful BL Lacertae objects. We find significant correlations which correspond to the probability of statistical fluctuation less than $10^{-4}$, including penatly for selecting the subset of brightest BL Lacs. We conclude that some of BL Lacs are sources of the observed UHECR and present a list of most probable candidates.

Source: http://arxiv.org/abs/astro-ph/0102476v2

43
43

Sep 20, 2013
09/13

by
P. G. Tinyakov; I. I. Tkachev

texts

#
eye 43

#
favorite 0

#
comment 0

The recently observed correlation between HiRes stereo cosmic ray events with energies E ~ 10 EeV and BL Lacs occurs at an angle which strongly suggests that the primary particles are neutral. We analyze whether this correlation, if not a statistical fluctuation, can be explained within the Standard Model, i.e., assuming only known particles and interactions. We have not found a plausible process which can account for these correlations. The mechanism which comes closest -- the conversion of...

Source: http://arxiv.org/abs/astro-ph/0612359v1

84
84

Sep 22, 2013
09/13

by
A. N. Kuznetsov; P. G. Tinyakov

texts

#
eye 84

#
favorite 0

#
comment 0

It is shown that periodic instanton solutions may have bifurcations which qualitatively change the behaviour of the finite temperature transition rate. These bifurcations are studied numerically in a quantum mechanical model and in the massive two-dimensional sigma model with the Skyrme term. General rules which determine the behaviour of periodic instantons near bifurcations are derived and applied to the Electroweak Theory.

Source: http://arxiv.org/abs/hep-ph/9704242v1

45
45

Sep 20, 2013
09/13

by
V. A. Rubakov; P. G. Tinyakov

texts

#
eye 45

#
favorite 0

#
comment 0

We review some theoretical and phenomenological aspects of massive gravities in 4 dimensions. We start from the Fierz--Pauli theory with Lorentz-invariant mass terms and then proceed to Lorentz-violating masses. Unlike the former theory, some models with Lorentz-violation have no pathologies in the spectrum in flat and nearly flat backgrounds and lead to interesting phenomenology.

Source: http://arxiv.org/abs/0802.4379v1

42
42

Sep 20, 2013
09/13

by
S. L. Dubovsky; P. G. Tinyakov

texts

#
eye 42

#
favorite 0

#
comment 0

We briefly review current theoretical and experimental status of Ultra-High Energy Cosmic Rays. We show that ``top-down'' mechanisms of UHE CR which involve heavy relic particle-like objects predict Galactic anisotropy of highest energy cosmic rays at the level of minimum $\sim 20%$. This anisotropy is large enough to be either observed or ruled out in the next generation of experiments.

Source: http://arxiv.org/abs/hep-ph/9810401v1

59
59

Sep 18, 2013
09/13

by
A. N. Kuznetsov; P. G. Tinyakov

texts

#
eye 59

#
favorite 0

#
comment 0

We calculate numerically the probability $\exp[ {1\over\lambda} F(E/E_{sph},N/N_{sph})]$ of the false vacuum decay in the massive four-dimensional $-\lambda\phi^4$ model from multiparticle initial states with fixed number of particles $N$ and energy $E$ greater than the height of the barrier $E_{sph}$. We find that at $E\lsim 3E_{sph}$ and $N\lsim 0.4N_{sph}$ the decay is classically forbidden and thus is exponentially suppressed. We argue that the classically forbidden region extends at small...

Source: http://arxiv.org/abs/hep-ph/9510310v3

99
99

Jul 20, 2013
07/13

by
V. A. Rubakov; P. G. Tinyakov

texts

#
eye 99

#
favorite 0

#
comment 0

We consider the modification of Newton's gravity law in Dolgov's higher spin models designed to compensate the cosmological constant. We find that the effective Planck mass is unacceptably large in these models. We also point out that the properties of gravitational waves are entirely different in these models as compared to general relativity.

Source: http://arxiv.org/abs/hep-ph/9906239v1

39
39

Sep 20, 2013
09/13

by
S. L. Dubovsky; P. G. Tinyakov

texts

#
eye 39

#
favorite 0

#
comment 0

We show that ``top-down'' mechanisms of Ultra-High Energy Cosmic Rays which involve heavy relic particle-like objects predict Galactic anisotropy of highest energy cosmic rays at the level of minimum $\sim 20%$. This anisotropy is large enough to be either observed or ruled out in the next generation of experiments.

Source: http://arxiv.org/abs/hep-ph/9802382v2

41
41

Sep 19, 2013
09/13

by
Alexander Kusenko; Mikhail Shaposhnikov; P. G. Tinyakov

texts

#
eye 41

#
favorite 0

#
comment 0

We formulate a set of simple sufficient conditions for the existence of Q-balls in gauge theories.

Source: http://arxiv.org/abs/hep-th/9801041v1

12
12

Jun 30, 2018
06/18

by
M. S. Pshirkov; P. G. Tinyakov; F. R. Urban

texts

#
eye 12

#
favorite 0

#
comment 0

We re-analyse the subset of the Faraday rotation measures data from the NRAO VLA Sky Survey catalogue for which redshift and spectral index information is available, in order to better elucidate the relations between these observables. We split this subset in two based on their radio luminosity, and find that higher power sources have a systematically higher residual rotation measure, once the regular field of the Milky Way is subtracted. This rotation measure stands well above the variances...

Topics: Astrophysics of Galaxies, Astrophysics, Cosmology and Nongalactic Astrophysics

Source: http://arxiv.org/abs/1407.3909

102
102

Sep 17, 2013
09/13

by
S. L. Dubovsky; V. A. Rubakov; P. G. Tinyakov

texts

#
eye 102

#
favorite 0

#
comment 0

We discuss whether electric charge conservation may not hold in four-dimensional world in models with infinite extra dimensions, i.e., whether escape of charged particles from our brane is consistent with effectively four-dimensional electrodynamics on the brane. We introduce a setup with photon localized on the brane and show that charge leakage into extra dimension is allowed within this setup. The electric field induced on the brane by escaping charge does not obey four-dimensional Maxwell's...

Source: http://arxiv.org/abs/hep-ph/0007179v2

60
60

Sep 21, 2013
09/13

by
G. I. Rubtsov; M. S. Pshirkov; P. G. Tinyakov

texts

#
eye 60

#
favorite 0

#
comment 0

We search the Fermi-LAT photon database for an extended gamma-ray emission which could be associated with any of the 581 previously detected gamma-ray bursts (GRBs) visible to the Fermi-LAT. For this purpose we compare the number of photons with energies E > 100 MeV and E > 1 GeV which arrived in the first 1500 seconds after the burst from the same region, to the expected background. We require that the expected number of false detections does not exceed 0.05 for the entire search and...

Source: http://arxiv.org/abs/1104.5476v2

122
122

Jul 20, 2013
07/13

by
Alexander Kusenko; Vadim Kuzmin; Mikhail Shaposhnikov; P. G. Tinyakov

texts

#
eye 122

#
favorite 0

#
comment 0

Theories with low-energy supersymmetry predict the existence of stable non-topological solitons, Q-balls, that can contribute to dark matter. We discuss the experimental signatures, methods of detection, and the present limits on such dark matter candidates.

Source: http://arxiv.org/abs/hep-ph/9712212v2

58
58

Sep 20, 2013
09/13

by
V. A. Rubakov; D. T. Son; P. G. Tinyakov

texts

#
eye 58

#
favorite 0

#
comment 0

A solution to the classical field equations in the massless (1+1)-dimensional O(3) sigma model is found, which describes a multi-particle instanton-like transition at high energy. In the limit of small number of initial particles, the number of final particles is shown to be also small, and the probability of the transition is suppressed by $\exp(-2S_0)$, where $S_0$ is the instanton action. This solution, however, does not correspond to the maximum transition probability among all states with...

Source: http://arxiv.org/abs/hep-ph/9212309v1

44
44

Sep 22, 2013
09/13

by
S. L. Dubovsky; P. G. Tinyakov; I. I. Tkachev

texts

#
eye 44

#
favorite 0

#
comment 0

Observation of clustering of ultra-high energy cosmic rays (UHECR) suggests that they are emitted by compact sources. Assuming small deflection of UHECR during the propagation, the statistical analysis of clustering allows to estimate the spatial density of the sources, h, including those which have not yet been observed directly. When applied to astrophysical models involving extra-galactic sources, the estimate based on 14 events with energy E>10^{20} eV gives h ~ 6 X 10^{-3} Mps^{-3}....

Source: http://arxiv.org/abs/astro-ph/0001317v2

38
38

Sep 19, 2013
09/13

by
D. S. Gorbunov; P. G. Tinyakov; S. V. Troitsky

texts

#
eye 38

#
favorite 0

#
comment 0

The Z-burst mechanism invoked to explain ultra-high energy cosmic rays is severely constrained by measurements of the cosmic gamma-ray background by EGRET. We discuss the case of optically thick sources and show that jets and hot spots of active galaxies cannot provide the optical depth required to suppress the photon flux. Other extragalactic accelerators (AGN cores and sites of gamma ray bursts), if they are optically thick, could be tested by future measurements of the secondary neutrino...

Source: http://arxiv.org/abs/astro-ph/0206385v3

51
51

Sep 22, 2013
09/13

by
M. V. Libanov; V. A. Rubakov; P. G. Tinyakov

texts

#
eye 51

#
favorite 0

#
comment 0

We propose a scenario of the beginning of inflation in which the non-vacuum value of the scalar field that drives inflation develops dynamically due to the non-minimal coupling to gravity. In this scenario, inflation emerges as an intermediate stage of the evolution of the Universe, well after the Planck epoch, from a fairly general initial state.

Source: http://arxiv.org/abs/hep-ph/9807553v1

55
55

Sep 18, 2013
09/13

by
S. L. Dubovsky; V. A. Rubakov; P. G. Tinyakov

texts

#
eye 55

#
favorite 0

#
comment 0

In a brane (domain wall) scenario with an infinite extra dimension and localized gravity, bulk fermions and scalars often have bound states with zero 4-dimensional mass. In this way massless matter residing on the brane may be obtained. We consider what happens when one tries to introduce small, but non-vanishing mass to these matter fields. We find that the discrete zero modes turn into quasi-localized states with finite 4-dimensional mass and finite width. The latter is due to tunneling of...

Source: http://arxiv.org/abs/hep-th/0006046v1

42
42

Sep 23, 2013
09/13

by
S. L. Dubovsky; P. G. Tinyakov; I. I. Tkachev

texts

#
eye 42

#
favorite 0

#
comment 0

We construct a consistent model of gravity where the tensor graviton mode is massive, while linearized equations for scalar and vector metric perturbations are not modified. The Friedmann equation acquires an extra dark-energy component leading to accelerated expansion. The mass of the graviton can be as large as $\sim (10^{15}{cm})^{-1}$, being constrained by the pulsar timing measurements. We argue that non-relativistic gravitational waves can comprise the cold dark matter and may be detected...

Source: http://arxiv.org/abs/hep-th/0411158v2

70
70

Jul 20, 2013
07/13

by
M. S. Pshirkov; P. G. Tinyakov; F. R. Urban

texts

#
eye 70

#
favorite 0

#
comment 0

We study the influence of the random part of the Galactic magnetic field on the propagation of ultra high-energy cosmic rays. Within very mild approximations about the properties of the electron density fluctuations in the Galaxy we are able to derive a clear and direct relation between the observed variance of rotation measures and the predicted cosmic ray deflections. Remarkably, this is obtained bypassing entirely the detailed knowledge of the magnetic properties of the turbulent plasma....

Source: http://arxiv.org/abs/1304.3217v1

66
66

Sep 19, 2013
09/13

by
Alexander Kusenko; Mikhail Shaposhnikov; P. G. Tinyakov; Igor I. Tkachev

texts

#
eye 66

#
favorite 0

#
comment 0

Electroweak models with low-energy supersymmetry breaking predict the existence of stable non-topological solitons, Q-balls, that can be produced in the early universe. The relic Q-balls can accumulate inside a neutron star and gradually absorb the baryons into the scalar condensate. This causes a slow reduction in the mass of the star. When the mass reaches a critical value, the neutron star becomes unstable and explodes. The cataclysmic destruction of the distant neutron stars may be the...

Source: http://arxiv.org/abs/hep-ph/9801212v2

53
53

Sep 23, 2013
09/13

by
A. Neronov; D. V. Semikoz; P. G. Tinyakov; I. I. Tkachev

texts

#
eye 53

#
favorite 0

#
comment 0

We analyze the gamma-ray halo around stacked AGNs reported in Ap.J.Lett., 2010, 722, L39. First, we show that the angular distribution of gamma-rays around the stacked AGNs is consistent with the angular distribution of the gamma-rays around the Crab pulsar, which is a point source for Fermi/LAT. This makes it unlikely that the halo is caused by an electromagnetic cascade of TeV photons in the intergalactic space. We then compare the angular distribution of gamma-rays around the stacked AGNs...

Source: http://arxiv.org/abs/1006.0164v2

38
38

Sep 21, 2013
09/13

by
A. A. Penin; V. A. Rubakov; P. G. Tinyakov; S. V. Troitsky

texts

#
eye 38

#
favorite 0

#
comment 0

In many theories with flat directions of scalar potential, static vortex solutions do not exist for a generic choice of vacuum. In two Euclidean dimensions, we find their substitutes --- constrained instantons consisting of compact core formed by Abrikosov--Nielsen--Olesen vortex and long-ranged cloud of modulus field. In (3+1) dimensions, an initial compact configuration of string topology evolves in such a way that at every point in space the modulus relaxes, in a universal manner, to one and...

Source: http://arxiv.org/abs/hep-ph/9609257v1

37
37

Jul 20, 2013
07/13

by
D. S. Gorbunov; P. G. Tinyakov; I. I. Tkachev; S. V. Troitsky

texts

#
eye 37

#
favorite 0

#
comment 0

A natural interpretation of the correlation between nearby Active Galactic Nuclei (AGN) and the highest-energy cosmic rays observed recently by the Pierre Auger Collaboration is that the sources of the cosmic rays are either AGN or other objects with a similar spatial distribution (the ``AGN hypothesis''). We question this interpretation. We calculate the expected distribution of the arrival directions of cosmic rays under the AGN hypothesis and argue that it is not supported by the data, one...

Source: http://arxiv.org/abs/0804.1088v1

44
44

Sep 21, 2013
09/13

by
D. S. Gorbunov; P. G. Tinyakov; I. I. Tkachev; S. V. Troitsky

texts

#
eye 44

#
favorite 0

#
comment 0

The existing correlation between BL Lacertae objects (BL Lacs) and cosmic-ray events observed by HiRes experiment provide sufficient information to formulate quantitatively the hypothesis about the flux of neutral cosmic-ray particles originated from BL Lacs. We determine the potential of future cosmic ray experiments to test this hypothesis by predicting the number of coincidences between arrival directions of cosmic rays and positions of BL Lacs on the celestial sphere, which should be...

Source: http://arxiv.org/abs/astro-ph/0508329v1

45
45

Sep 18, 2013
09/13

by
D. S. Gorbunov; P. G. Tinyakov; I. I. Tkachev; S. V. Troitsky

texts

#
eye 45

#
favorite 0

#
comment 0

We found significant correlations between the arrival directions of the highest energy photons (E>10 GeV) observed by EGRET and positions of the BL Lac type objects (BL Lacs). The observed correlations imply that not less than three per cent of extragalactic photons at these energies originate from BL Lacs. Some of the correlating BL Lacs have no counterparts in the EGRET source catalog, i.e. do not coincide with strong emitters of gamma-rays at lower energy. The study of correlating BL Lacs...

Source: http://arxiv.org/abs/astro-ph/0505597v1

74
74

Jul 20, 2013
07/13

by
D. S. Gorbunov; P. G. Tinyakov; I. I. Tkachev; S. V. Troitsky

texts

#
eye 74

#
favorite 0

#
comment 0

Previously suggested correlations of BL Lac type objects with the arrival directions of the ultra-high-energy cosmic ray primaries are tested by making use of the HiRes stereoscopic data. The results of the study support the conclusion that BL Lacs may be the cosmic ray sources and suggest the presence of a small (a few percent) fraction of neutral primaries at E>10^{19} eV.

Source: http://arxiv.org/abs/astro-ph/0406654v1

47
47

Sep 22, 2013
09/13

by
M. S. Pshirkov; P. G. Tinyakov; P. P. Kronberg; K. J. Newton-McGee

texts

#
eye 47

#
favorite 0

#
comment 0

We made use of the two latest sets of Rotational Measures (RMs) of extra-galactic radio sources, namely the NRAO VLA Sky Survey otation Measures Catalogue, and a compilation by Kronberg&Newton-McGee(2011), to infer the global structure of the Galactic Magnetic Field (GMF). We have checked that these two data sets are consistent with each other. Motivated by clear patterns in the observed distribution of RMs over the sky, we considered GMF models consisting of the two components: disk...

Source: http://arxiv.org/abs/1103.0814v3

9
9.0

Jun 28, 2018
06/18

by
P. G. Tinyakov; F. R. Urban; D. Ivanov; G. B. Thomson; A. H. Tirone

texts

#
eye 9

#
favorite 0

#
comment 0

We investigate signatures that would be produced in the spectrum and sky distribution of UHECR by a population of the Galactic sources of high-energy protons in the energy range around 1~EeV, i.e., around the diffusive-to-ballistic transition. In this regime, the CR flux has to be calculated numerically. We employ the approach that consists in backtracking anti-protons from Earth through the Galaxy and integrating the source emissivity along the trajectory. This approach makes evident two...

Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, High Energy Astrophysical Phenomena

Source: http://arxiv.org/abs/1511.01333