# TeVPA 2018

27-31 August 2018
LVH, Luisenstraße 58, 10117 Berlin
Europe/Berlin timezone
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# Cosmic Rays

## Place

Location: LVH, Luisenstraße 58, 10117 Berlin
Address: LANGENBECK VIRCHOW HAUS Luisenstraße 58, 10117 Berlin
Date: from 27 Aug 14:00 to 30 Aug 15:25

## Description

Chair 1: Don Ellison | Chair 2: Denise Boncioli | Chair 3: Andrew Taylor | Chair 4: Daniele Gaggero | Chair 5: Tony Bell | Chair 6: Markus Ahlers

## Conveners

• 27 Aug 14:00 - 3:42 PM 1
• Dr. Casanova, Sabrina (IFJ PAN & MPIK HD)
• Dr. boncioli, denise (DESY)
• Bykov, Andrei (Ioffe Physico-Technical Institute)
• 28 Aug 14:00 - 3:45 PM 2
• Dr. Casanova, Sabrina (IFJ PAN & MPIK HD)
• Dr. boncioli, denise (DESY)
• Bykov, Andrei (Ioffe Physico-Technical Institute)
• 28 Aug 16:45 - 6:30 PM 3
• Dr. Casanova, Sabrina (IFJ PAN & MPIK HD)
• Dr. boncioli, denise (DESY)
• Bykov, Andrei (Ioffe Physico-Technical Institute)
• 29 Aug 16:15 - 6:00 PM 4
• Dr. Casanova, Sabrina (IFJ PAN & MPIK HD)
• Dr. boncioli, denise (DESY)
• Bykov, Andrei (Ioffe Physico-Technical Institute)
• 30 Aug 14:00 - 3:25 PM 5
• Dr. Casanova, Sabrina (IFJ PAN & MPIK HD)
• Dr. boncioli, denise (DESY)
• Bykov, Andrei (Ioffe Physico-Technical Institute)

## Timetable | Contribution List

Displaying 30 contributions out of 30
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The origin and nature of ultrahigh-energy cosmic rays (UHECRs) are one of the most intriguing mysteries in Astroparticle Physics. The two giant observatories, Telescope Array Experiment and Pierre Auger Observatory, are steadily observing UHECRs in both hemispheres. We highlight their latest results and address the requirements for a next-generation observatory. The Fluorescence detector Array o ... More
Presented by Dr. Toshihiro FUJII on 28/8/2018 at 13:15
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The Pierre Auger Observatory with its exposure provides us with a large set of excellent data. The analysis of these data has led to major breakthroughs in the last decade, but a coherent interpretation has not yet been achieved. New questions have emerged, including that of the composition of cosmic rays in the energy region of the flux suppression, which is of key importance for making progress. ... More
Presented by Prof. Daniele MARTELLO on 28/8/2018 at 13:00
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The Cosmic Ray (CR) physics has entered a new era driven by high precision measurements coming from direct detection (especially AMS-02 and PAMELA) as well as gamma-ray observations (Fermi-LAT) which requires the development of more refined models for the CR acceleration and propagation. In this talk I will present a model for the generation of the Galactic magnetic halo where Cosmic Rays propagat ... More
Presented by Dr. Giovanni MORLINO on 29/8/2018 at 14:15
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
An excess of cosmic positrons above 10 GeV with respect to the spallation reaction of cosmic rays (CRs) with the interstellar medium has been measured by Pamela, Fermi-LAT and with unprecedented precision by the AMS-02 experiment. Various interpretations have been invoked to interpret this excess, such as production from supernova remnants, pulsar wind nebulae (PWNe) and dark matter. A dominant co ... More
Presented by Dr. Mattia DI MAURO on 30/8/2018 at 13:08
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Diffusive shock acceleration (DSA) at supernova remnant (SNR) shock fronts is thought to accelerate galactic cosmic rays (CRs) to energies below the knee, while an extragalactic origin is presumed for CRs with energies beyond the ankle. CRs with energies between $3 \times 10^{15}$ and $10^{18}$ eV, which we dub the shin," have an unknown origin. In this talk, I will outline our recent theoretica ... More
Presented by Chad BUSTARD on 29/8/2018 at 15:23
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
IceTop is the surface component of the IceCube Observatory at the South pole and consists of ice-cherenkov detector stations at the top of IceCube's strings. The air shower data are analyzed to study the cosmic ray spectrum and composition in the energy range from PeV to EeV. The shower size $S_{125}$ from IceTop alone can be used as a proxy for estimating the primary energy, and unfolded with ... More
Presented by Dr. Matthias PLUM on 28/8/2018 at 12:45
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Experimental observations of Galactic and extragalactic cosmic rays in the last decade challenge the theoretical description of both the sources and the transport of cosmic rays. The latest version of the publicly available simulation framework CRPropa 3.2 aims at a consistent solution of the cosmic-ray transport problem, including the production and propagation of secondary neutrinos and elec ... More
Presented by Mr. Lukas MERTEN on 29/8/2018 at 15:06
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
We present a new parametrisation of the cosmic-ray flux and its mass composition over an energy range from 1 GeV to 10^11 GeV. We combine measurements of the flux of individual elements from high-precision satellites and balloon experiments with indirect measurements of mass groups from the leading air shower experiments. We provide the first fit of this kind that consistently takes both statistic ... More
Presented by Dr. Hans DEMBINSKI on 28/8/2018 at 14:45
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Electrons and positrons play a special role among cosmic ray (CR) species. Most strikingly, their strong energy losses in the Galactic magnetic and radiation fields severely limit their propagation distances. Therefore electrons and positrons offer invaluable insights into the local properties of CR acceleration and propagation. In this talk we present our model for their interstellar spectra over ... More
Presented by Dr. Andrea VITTINO on 30/8/2018 at 12:51
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
In this work, the photon horizon including LIV is studied by correcting the pair-production interaction of gamma-ray with the Cosmic Background Light. The derived scenarios are used to predict important changes in the propagation of photons with energy greater than 10 ^ 18 eV. We have computed the GZK photon flux on Earth for several ultra high energy cosmic ray source (UHECR) models and we compar ... More
Presented by Dr. Humberto MARTÍNEZ-HUERTA on 29/8/2018 at 15:40
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The Pierre Auger Observatory in Argentina is the world's largest observatory for measuring ultra-high energy cosmic rays with an observation area of 3000 km2. The atomic nuclei arriving from outer space reach the highest energies observed in nature. Clues to their origin come from studying the distribution of their arrival directions. We discuss an anisotropy observed at more than the 5 sigma leve ... More
Presented by Prof. Martin ERDMANN on 28/8/2018 at 12:00
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The inclusive flux of cosmic electrons and positrons is now known with unprecedented precision up to few tens of TeV. Very recent data from AMS-02, DAMPE, CALET, FERMI and HESS suggest that the flux starts deviating from a single power law at TeV energies, with the presence of a break at around 1 TeV. In addition, new stringent upper bounds on the dipole anisotropy of the inclusive flux have been ... More
Presented by Silvia MANCONI on 30/8/2018 at 12:17
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Recent results from the Pierre Auger Collaboration have shown that the composition of ultrahigh- energy cosmic rays (UHECRs) becomes gradually heavier with increasing energy. Although gamma- ray bursts (GRBs) have been promising sources of UHECRs, it is still unclear whether they can account for the Auger results because of their unknown nuclear composition of ejected UHECRs. In this work, we revi ... More
Presented by Mr. Bing Theodore ZHANG on 28/8/2018 at 15:19
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The Dark Matter Particle Explorer (DAMPE) is a high energy astroparticle satellite launched on the 17th December 2015 into a sun-synchronous orbit at an altitude of 500 km. The DAMPE detector consists of a double layer of Plastic Scintillator strips Detector (PSD), followed by a Silicon-tungsten TracKer-converter (STK), a Bismuth Germanium Oxide electromagnetic calorimeter (BGO) and a NeUtron Dete ... More
Presented by Ms. Stefania VITILLO on 27/8/2018 at 12:00
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The new approach to investigations of inclined muon bundles, based on the local muon density spectra (LMDS) phenomenology allows to study primary cosmic rays in a wide energy interval from 10^15 up to 10^19 eV. The features of the proposed method for studying EAS are discussed. The transverse dimensions of EAS rapidly increase with increasing of the zenith angle and, hence, EAS in a wide energy in ... More
Presented by Prof. Igor YASHIN on 28/8/2018 at 13:30
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Over the years, significant efforts have been devoted to the understanding of the radio emission of extensive air shower (EAS) in the range [20-80] MHz but, despite some studies led until the nineties, the [1-10] MHz band has remained unused for nearly 30 years. At that time it has been measured by some pioneering experiments but also suggested by theoretical calculations that EAS could produce a ... More
Presented by Mr. Antony ESCUDIE on 27/8/2018 at 13:08
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The injection problem is a key and still unresolved issue of diffusive shock acceleration theory. Electron injection mechanisms at high Mach-number nonrelativistic perpendicular shocks are under consideration here for parameters that are applicable to young SNR shocks. Using high-resolution large-scale two-dimensional fully kinetic particle-in-cell (PIC) simulations we explore the production of hi ... More
Presented by Dr. Artem BOHDAN on 29/8/2018 at 14:49
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Air showers can be detected by the short radio pulses they emit. The LOFAR radio telescope contains a dense core region where 384 antennas are located within a circle of 320 m diameter. Here, the properties of radio emission from air showers have been measured in unprecedented detail. The complicated radiation patterns on the ground have been shown to agree with modern theory, including the full S ... More
Presented by Stijn BUITINK on 27/8/2018 at 13:25
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Despite significant progress over more than 100 years, no cosmic ray accelerator has been unambiguously identified as the source of the locally measured flux. High-energy electrons and positrons are of particular relevance in the search for sources as radiative energy losses constrain their propagation to distances of about 1 kpc. At the highest energies, the measured spectrum is dominated and sha ... More
Presented by Philipp MERTSCH on 30/8/2018 at 12:00
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Telescope Array (TA) is a cosmic ray detector in the Northern hemisphere that measures cosmic rays of energies from 1 PeV to 100 EeV and higher. TA is a hybrid detector that consists of a ground array of scintillation counters, covering 700 km$^2$ on the ground, and overlooked by the three fluorescence detector stations. Sensitivity of TA has been extended by the TA low energy extension (TALE) t ... More
Presented by Dr. Dmitri IVANOV on 28/8/2018 at 12:15
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Telescope Array observes ultra-high-energy cosmic rays in the Northern hemisphere for 10 years, and the statistics starts to allow for studies of the cosmic-ray flux not only averaged over the field of view, but direction-dependent. I review recent Telescope Array results and future plans related to anisotropy of arrival directions and direction-dependent studies of the energy spectrum and primary ... More
Presented by Prof. Sergey TROITSKY on 28/8/2018 at 12:30
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The CALorimetric Electron Telescope (CALET) space experiment, which has been developed by Japan in collaboration with Italy and the United States, is a high-energy astroparticle physics mission installed on the International Space Station (ISS). The primary goals of the CALET mission include investigating possible nearby sources of high-energy electrons, studying the details of galactic particle p ... More
Presented by Yoichi ASAOKA on 27/8/2018 at 12:51
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Multi-TeV cosmic-ray electrons carry unique information about local accelerators because of their severe radiative energy losses and the associated short propagation distances. The very low fluxes and the large background of hadronic cosmic rays however impose severe challenges to both space-born and ground-based measurements. The next generation satellite experiments are just starting to probe th ... More
Presented by Dr. Daniel KERSZBERG on 30/8/2018 at 12:34
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Large High Altitude Air Shower Observation (LHAASO), located in Daocheng Haizishan, 4300m a.s.l., Sichuan Province, Chain, is under construction now and is expected to be completely operated by 2021. One of the main science objects of LHAASO is to precisely measure the cosmic rays energy spectrum of individual components from 1014 eV to 1018 eV. LHAASO is consist of four types of detectors: the Wa ... More
Presented by Dr. Li.Qiao YIN on 27/8/2018 at 12:17
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The origin of ultra-high energy cosmic rays (UHECRs) is still one of the biggest unsolved questions in astrophysics. We present a novel approach combining the knowledge about neutrinos and cosmic rays at the highest energies to give an alternative, joint solution to this question with Tidal Disruption Events (TDEs). TDEs are processes where stars are torn apart by the strong gravitational force cl ... More
Presented by Daniel BIEHL on 28/8/2018 at 15:53
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Non-linear diffusive shock acceleration (NDSA) is believed to be the mechanism responsible for the acceleration of cosmic-rays in supernova remnants. But current steady-state models fail to reproduce spectral features observed in supernova remnants, like spectral breaks or soft spectra at the highest energies. We present a fully time-dependent NDSA-model in which we simultaneously solve the tra ... More
Presented by Robert BROSE on 29/8/2018 at 14:32
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Charged particles of extraterrestial origin with energies in excess of 10<sup>18</sup>&nbsp;eV (known as ultra-high-energy cosmic rays, UHECR) were first observed in the 1960s, and current-generation UHECR detectors have collected over 10<sup>5</sup> such events. Nevertheless, the interpretation of these data is not straightforward, and the sources of such particles are still unknown (but widely ... More
Presented by Dr. Armando DI MATTEO on 28/8/2018 at 15:02
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
In addition to the emergence of time domain astronomy, the advent of multi-messenger astronomy opens up a new window on transient high-energy sources. Through the multi-messenger study of the most energetic objects in our universe, two fundamental questions can be addressed: what are the sources of ultra-high energy cosmic rays (UHECRs) and the sources of very-high energy neutrinos? Jetted Tida ... More
Presented by Ms. Claire GUÉPIN on 28/8/2018 at 15:36
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
Radio galaxies are intensively discussed as the sources of cosmic rays observed above about 3 EeV, called ultra-high energy cosmic rays (UHECRs). The talk presents a first, systematic study that takes the individual characteristics of these sources into account, as well as the impact of the galactic magnetic field, as well as the extragalactic magnetic-field structures up to a distance of 120 Mpc ... More
Presented by Dr. Björn EICHMANN on 28/8/2018 at 16:10
Type: Talk Session: Cosmic Rays
Track: Cosmic Rays
The origin of very high energy (VHE) cosmic rays is one of the oldest and deepest puzzles of astrophysics. Understanding particle production and acceleration in astrophysical sources, and the mechanisms of propagation of cosmic rays through the interstellar medium is paramount to solving this fundamental problem. Cosmic rays produced in nearby accelerators can be observed directly through measurem ... More
Presented by Mr. Andrii PETRASHYK on 27/8/2018 at 12:34
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