ZEU-THAT

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2019-08-07
17:48
[PUBDB-2019-02938] Journal Article
et al
Preliminary Study for the Laboratory Experiment of Cosmic-Rays driven Magnetic Field Amplification
To understand astrophysical magnetic-field amplification, we conducted a feasibility study for a laboratory experiment of a non-resonant streaming instability at the Photo Injector Test Facility at DESY, Zeuthen site (PITZ). This non-resonant streaming instability, also known as Bell’s instability, is generally regarded as a candidate for the amplification of interstellar magnetic field in the upstream region of supernova-remnant shocks, which is crucial for the efficiency of diffusive shock acceleration. [...]
ddc:530
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2019-07-29
14:43
OpenAccess [PUBDB-2019-02862] Report/Journal Article
et al
Conservative dynamics of binary systems to fourth Post-Newtonian order in the EFT approach II: Renormalized Lagrangian
[arXiv:1903.05113]
We complete the derivation of the conservative dynamics of binary systems to fourth Post-Newtonian (4PN) order in the effective field theory (EFT) approach. We present a self-contained (ambiguity-free) computation of the renormalized Lagrangian, entirely within the confines of the PN expansion. [...]
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2019-07-15
16:44
OpenAccess [PUBDB-2019-02725] Journal Article
et al
Open Questions in Cosmic-Ray Research at Ultrahigh Energies
We review open questions and prospects for progress in ultrahigh-energy cosmic ray (UHECR) research, based on a series of discussions that took place during the “The High-Energy Universe: Gamma-Ray, Neutrino, and Cosmic-ray Astronomy” MIAPP workshop in 2018. Specifically, we overview open questions on the origin of the bulk of UHECRs, the UHECR mass composition, the origin of the end of the cosmic-ray spectrum, the transition from Galactic to extragalactic cosmic rays, the effect of magnetic fields on the trajectories of UHECRs, anisotropy expectations for specific astrophysical scenarios, hadronic interactions, and prospects for discovering neutral particles as well as new physics at ultrahigh energies [...]
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ddc:620
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2019-07-15
16:34
OpenAccess [PUBDB-2019-02724] Preprint/Report
et al
Fundamental Physics with High-Energy Cosmic Neutrinos
[arXiv:1903.04333]
 GO
High-energy cosmic neutrinos can reveal new fundamental particles and interactions, probing energy and distance scales far exceeding those accessible in the laboratory. This white paper describes the outstanding particle physics questions that high-energy cosmic neutrinos can address in the coming decade. [...]
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2019-07-15
14:44
OpenAccess [PUBDB-2019-02713] Journal Article
et al
A Search for Pulsed Very High-energy Gamma-Rays from 13 Young Pulsars in Archival VERITAS Data
We conduct a search for periodic emission in the very high-energy (VHE) gamma-ray band (E > 100 GeV) from a total of 13 pulsars in an archival VERITAS data set with a total exposure of over 450 hr. The set of pulsars includes many of the brightest young gamma-ray pulsars visible in the Northern Hemisphere. [...]
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ddc:520
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2019-07-15
13:56
OpenAccess [PUBDB-2019-02711] Journal Article
et al
GeV Observations of the Extended Pulsar Wind Nebulae Constrain the Pulsar Interpretations of the Cosmic-Ray Positron Excess
It has long been suggested that nearby pulsars within ~1 kpc are the leading candidate of the 10–500 GeV cosmic-ray positron excess measured by PAMELA and other experiments. The recent measurement of the surface brightness profile of TeV nebulae surrounding Geminga and PSR B0656+14 by the High-Altitude Water Cherenkov Observatory (HAWC) suggests inefficient diffusion of particles from the sources, giving rise to a debate on the pulsar interpretation of the cosmic-ray positron excess. [...]
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2019-06-13
11:33
OpenAccess [PUBDB-2019-02473] Preprint/Report
et al
Non-thermal emission from the reverse shock of the youngest galactic Supernova remnant G1.9+0.3
[arXiv:1906.02725]
 GO
Context. The youngest Galactic supernova remnant G1.9+0.3 is an interesting target for next generation gamma-ray observatories. [...]
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2019-05-20
16:18
OpenAccess [PUBDB-2019-02318] Report/Journal Article
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Constraining the Magnetic Field in the TeV Halo of Geminga with X-Ray Observations
[arXiv:1904.11438]
Recently, the High Altitude Water Cherenkov (HAWC) collaboration reported the discovery of a TeV halo around the Geminga pulsar. The TeV emission is believed to originate from the inverse Compton scattering of pulsar-injected electrons/positrons off cosmic microwave background photons. [...]
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2019-05-20
16:09
Embargoed OpenAccess [PUBDB-2019-02317] Report/Journal Article
et al
Secondary neutrino and gamma-ray fluxes from SimProp and CRPropa
[DESY-19-008; arXiv:1901.01244]
The interactions of ultra-high energy cosmic rays (UHECRs) with background photons in extragalactic space generate high-energy neutrinos and photons. Simulating UHECR propagation requires assumptions about physical quantities such as the spectrum of the extragalactic background light (EBL) and photodisintegration cross sections. [...]
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ddc:530
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2019-05-07
16:21
OpenAccess [PUBDB-2019-02175] Journal Article
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Leptohadronic Blazar Models Applied to the 2014–2015 Flare of TXS 0506+056
We investigate whether the emission of neutrinos observed in 2014–2015 from the direction of the blazar TXS 0506+056 can be accommodated with leptohadronic multiwavelength models of the source commonly adopted for the 2017 flare. While multiwavelength data during the neutrino flare are sparse, the large number of neutrino events (13 ± 5) challenges the missing activity in gamma-rays [...]
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