25-27 September 2019
HU Berlin
Europe/Berlin timezone
Home > Contribution List

Contribution List

Displaying 56 contributions out of 56
Type: Poster Session: Postersession
The IceCube collaboration reported a $\sim 3.5\sigma$ excess of $13\pm5$ neutrino events in the direction of the blazar TXS 0506+056 during a $\sim$6 month period in 2014-2015, as well as the multi-messenger flare of neutrinos and gamma rays with $\sim3\sigma$ in 2017. We explore the possibility that both events are explained in the context of the neutral beam model of blazar jets. We demonstrate ... More
Presented by Dr. Maria Petropoulou PETROPOULOU
Presented by Derek Brindley FOX on 27 Sep 2019 at 11:20 AM
Type: Poster Session: Postersession
With the first measured correlation of an extremely high-energy neutrino event and a flaring gamma-ray source in September 2017, multimessenger astronomy has become more important than ever. The stereoscopic IACT system MAGIC, located at La Palma, Canary Islands, is in- volved in neutrino follow-up campaigns since 2012. The MAGIC telescopes are sensitive for gamma events with energies from ... More
Presented by Alicia FATTORINI
Presented by Mary Hall RENO on 27 Sep 2019 at 10:10 AM
Presented by Teppei KATORI on 27 Sep 2019 at 11:40 AM
Presented by Bair SHAYBONOV on 27 Sep 2019 at 12:40 PM
Presented by Dr. denise BONCIOLI on 25 Sep 2019 at 5:00 PM
Presented by Amy CONNOLLY on 27 Sep 2019 at 10:30 AM
Presented by Stefano MORISI on 26 Sep 2019 at 12:10 PM
Type: Poster Session: Postersession
The origin of neutrino flux observed in IceCube is still mainly unknown. Typically two flux components are assumed, namely: atmospheric neutrinos and an unknown astrophysical term. In principle the latter could also contain a top-down contribution coming for example from decaying dark matter. In this case one should also expect prompt and secondary gammas as well. This leads to the possibility of ... More
Presented by Damiano Francesco Giuseppe FIORILLO
Type: Invited speaker Session: Overview of neutrino sources, 2
Active galactic nuclei (AGN) with relativistic jets powered by accretion onto their central supermassive black hole are the most powerful persistent sources of electromagnetic radiation in the Universe, with bolometric luminosities of $\sim 10^{43}-10^{48}$ erg s$^{-1}$. Jetted AGN are promising cosmic ray accelerators and have abundant radiation fields for the production of high-energy neutrinos. ... More
Presented by Dr. Maria Petropoulou PETROPOULOU on 26 Sep 2019 at 11:30 AM
Presented by Andrea DONINI on 27 Sep 2019 at 9:50 AM
Presented by Dr. Rafael ALVES BATISTA on 26 Sep 2019 at 3:10 PM
Presented by Dr. Mauricio BUSTAMANTE on 27 Sep 2019 at 9:00 AM
Presented by Mr. Jonas HEINZE on 26 Sep 2019 at 2:50 PM
Presented by Shin'ichiro ANDO on 26 Sep 2019 at 11:00 AM
Type: Poster Session: Postersession
Blazar gamma-ray flares are ideal periods for high-energy neutrino production in many theoretical models. The detection of the high-energy neutrino IC-170922A in the direction of the blazar TXS 0506+056 during a gamma-ray flare in 2017, is the first association of a high-energy neutrino with an astrophysical source inconsistent with arising by chance at the 3 sigma level. To better understand how ... More
Presented by Dr. Foteini OIKONOMOU
Type: Invited speaker Session: The TXS 0506+056
Active Galactic Nuclei (AGN) have long been suggested among the candidate sources of cosmic high-energy neutrinos. If hadronic processes operate in the AGN jets, a lot can be learnt by combining neutrino observations with the putative accompanying electromagnetic information. This is motivated by the fact that both radiations may be pictured in the same astrophysical particle-cascades scenario, ca ... More
Presented by Dr. Sara BUSON on 26 Sep 2019 at 9:00 AM
Presented by Joeran STENNER
After the discovery of high-energy cosmic neutrinos and the likely observation of a first neutrino source with the IceCube neutrino telescope, the realization of a next generation neutrino telescope at the South Pole, IceCube-Gen2, is progressing. As a first step, the IceCube detector will be upgraded with seven new strings to be deployed near the center of the existing detector during during the ... More
Presented by Alexander KAPPES on 26 Sep 2019 at 4:00 PM
Type: Poster Session: Postersession
The origin of high energy astrophysical neutrinos is connected to interactions of Ultra-High Energy Cosmic Rays (UHECRs) with low energy photons. For UHECRs nuclei it is often assumed a quasi free interaction between the photon and a nucleon in the nucleus, which implies the yield of mesons (and therefore neutrinos) in nuclei scales with the mass number A. However, pion production in nuclei near t ... More
Presented by Leonel MOREJON
Presented by Piera SAPIENZA on 27 Sep 2019 at 12:10 PM
Type: Poster Session: Postersession
The origin of Ultra-High Energy Cosmic Rays (UHECRs) is still unknown. Gamma-Ray Bursts (GRBs) are considered as potential sources as they belong to the most energetic events observed to date. However, conventional GRB scenarios are strongly constrained by the non-observation of associated astrophysical neutrinos. On the other hand, hidden accelerators such as low-luminosity GRBs (LLGRBs) can amel ... More
Presented by Daniel BIEHL
Type: Invited speaker Session: Presentation of recent results
The IceCube Neutrino Observatory has established the measurement of a flux of high-energy astrophysical neutrinos in several detection channels. Here, we present an update to the analysis of through-going muon-neutrinos from the Northern Hemisphere. It was extended to almost ten years of data which have been re-processed (Pass-2) applying consistent event-selections and reconstructions. Additional ... More
Presented by Joeran STETTNER on 25 Sep 2019 at 2:10 PM
Type: Poster Session: Postersession
Based on the origin of the high-energy (X ray to TeV gamma ray) emission from blazars, the models describing their broadband spectral energy distribution (SED) can be broadly classified into three categories - leptonic, hadronic and mixed lepto-hadronic. One of the key advantages of hadronic and lepto-hadronic SED models is their ability to interpret multi-messenger photon and neutrino observation ... More
Presented by Mr. Wrijupan BHATTACHARYYA
Type: Poster Session: Postersession
Following the multi-messenger observations triggered by the IceCube telescope in September 2017, the blazar TXS 0506+056 has become a key object to study the connection between the high-energy neutrino and photon emission in active galactic nuclei. Accurate and contemporaneous multiwavelenght spectral measurements are essential to achieve this goal. After the TXS 0506+056 discovery at very-high-en ... More
Presented by Konstancja SATALECKA
Type: Poster Session: Postersession
Due to the large amounts of energy they release, the extremely luminous transients called Gamma-Ray Bursts (GRBs) are of great interest for high energy astroparticle physics. In the fireball internal shock scenario, particle acceleration occurs in collisions between regions of the jet with different Lorentz factors. Usually, the observed prompt emission is attributed to synchrotron emission fro ... More
Presented by Annika RUDOLPH
Type: Poster Session: Postersession
We discuss possible interpretations of the neutrinos observed from the AGN blazar TXS0506+056 in the multi-messenger and multi-wavelength context, including both the 2014-15 and2017 neutrino flares. While the neutrino observed in September 2017 has to describe contemporary data ine.g.the X-ray and VHE gamma-ray ranges, data at the 2014-15 excess are much sparser. We demonstrate that ... More
Presented by Mr. Xavier RODRIGUES, Dr. Shan GAO
Type: Poster Session: Postersession
The measurement of an astrophysical flux of high-energy neutrinos by IceCube is an important step towards finding the long-sought sources of cosmic rays. Nevertheless, the long exposure neutrino sky map shows no significant indication of point sources so far. This may point to a large population of faint, steady sources or flaring objects as origins of this flux. The most compelling evidence for a ... More
Presented by Konstancja SATALECKA
Presented by Dr. Philipp ELLER on 27 Sep 2019 at 9:30 AM
Presented by Dr. Daniele GAGGERO on 25 Sep 2019 at 5:30 PM
Presented by Dr. Shigeo KIMURA
Type: Invited speaker Session: Multi-messenger physics
The mergers of neutron stars are expected to produce high-energy neutrinos through particle acceleration inside the relativistic jets. In this talk, I will discuss future prospects for high-energy neutrino detection coincident with gravitational waves. We consider two neutrino production scenarios. One is the late-time engine activity of the short gamma-ray bursts. High-energy neutrinos are effici ... More
Presented by Dr. Shigeo KIMURA on 26 Sep 2019 at 2:30 PM
Presented by Andrew TAYLOR on 25 Sep 2019 at 4:30 PM
Type: Invited speaker Session: Overview of neutrino sources 1
IceCube has recently reported the discovery of high-energy neutrinos of astrophysical origin, opening up the PeV sky. These observations are challenging to interpret on the astronomical side and have triggered a fruitful collaboration across particle and astro-physics. I will present our work on blazars as possible neutrino sources, discuss briefly the association of some very high-energy IceCub ... More
Presented by Dr. Paolo PADOVANI on 25 Sep 2019 at 4:00 PM
Presented by Dr. Paolo PADOVANI
Presented by Susumu INOUE on 25 Sep 2019 at 5:50 PM
Type: Invited speaker Session: Overview of neutrino sources, 2
Since the detection of high-energy cosmic neutrinos at the IceCube Neutrino Observatory in 2013, there has been an on-going search to find suitable transient or variable source candidates. Despite recent evidence identifying a flaring blazar as a likely neutrino source, the vast majority of the diffuse neutrino flux measured by IceCube remains unexplained. The latest IceCube results testing time-d ... More
Presented by Mr. Robert STEIN on 26 Sep 2019 at 11:50 AM
Session: The TXS 0506+056
Presented by Chad FINLEY on 26 Sep 2019 at 10:10 AM
Presented by Dr. Kumiko KOTERA
Presented by Anna NELLES on 26 Sep 2019 at 4:30 PM
Type: Poster Session: Postersession
When ultrahigh-energy cosmic rays (UHECRs) interact with extragalactic photon backgrounds they can create neutrinos. Protons, compared with heavier nuclei, are especially efficient in producing such cosmogenic neutrinos. In our recent paper [1], we show that the expected cosmogenic neutrino flux at an energy of ~1 EeV mainly depends on the evolution with redshift of UHECR sources and the fraction ... More
Presented by Dr. Arjen VAN VLIET
Presented by Avishay GAL-YAM on 26 Sep 2019 at 2:00 PM
Presented by Veronique VAN ELEWYCK on 25 Sep 2019 at 2:30 PM
Presented by C. WIEBUSCH on 25 Sep 2019 at 1:40 PM
Type: Invited speaker Session: Presentation of recent results
I will summarize results to date from ANITA, a NASA Long Duration Balloon payload that has had four successful flights in Antarctica. ANITA is sensitive to two kinds of radio emission from particle showers: Askaryan emission from ultra-high energy (UHE) neutrinos interacting in the Antarctic ice, and Geomagnetic emission from UHE particles showering in the atmosphere. The latter channel is sensi ... More
Presented by Abigail VIEREGG on 25 Sep 2019 at 3:00 PM
Type: Poster Session: Postersession
MAGIC is a stereoscopic system of two Imaging Atmospheric Cherenkov Telescopes, designed for the measurement of very high energy gamma rays above 30 GeV. MAGIC can also be used as a detector of PeV-EeV tau neutrinos: an optimal region of pointing is accessible through the Earth-skimming technique. This region is located towards the Atlantic Ocean, a few degrees below the horizon. In this work, a ... More
Presented by Dr. Dariusz GORA
Type: Poster Session: Postersession
We propose a new scaling ansatz in the neutrino Dirac mass matrix to explain the low energy neutrino oscillations data, baryon number asymmetry and neutrinoless double beta decay. In this work, a full reconstruction of the neutrino Dirac mass matrix has been realized from the low energy neutrino oscillations data based on type-I seesaw mechanism. A concrete model based on A4 flavor symmetry has be ... More
Presented by Mrs. Salwa SHAGLEL
Type: Invited speaker Session: Future perspective 1
The Giant Radio Array for Neutrino Detection (GRAND) project aims to detect ultra-high-energy cosmic neutrinos, cosmic rays, and gamma rays with a radio antenna array deployed over a total area of 200 000 km2 in mountainous regions, in several favorable locations around the world. The strategy of GRAND is to detect air showers above 10^17 eV that are induced by the interaction of high-energy parti ... More
Presented by Dr. Kumiko KOTERA on 26 Sep 2019 at 5:00 PM
Session: The TXS 0506+056
Presented by Mr. Xavier RODRIGUES on 26 Sep 2019 at 9:30 AM
Session: The TXS 0506+056
Presented by Matteo CERRUTI on 26 Sep 2019 at 9:50 AM
Presented by Prof. Nepomuk OTTE on 26 Sep 2019 at 5:30 PM