Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)最新文献_第3页

Effects of environmental factors on the LHAASO-ED array 环境因素对LHAASO-ED阵列的影响

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0472

Xiaopeng Zhang, Yue Fu, Junlei Qiao, Xiangdong Sheng

引用次数: 0

On Why the 10-TeV Cosmic Ray Bump Originates in the Local Interstellar Medium 关于为什么10-TeV宇宙射线碰撞起源于本地星际介质

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0143

M. Malkov, Patrick H. Diamond, Mingyun Cao, Igor Moskalenko

{"title":"On Why the 10-TeV Cosmic Ray Bump Originates in the Local Interstellar Medium","authors":"M. Malkov, Patrick H. Diamond, Mingyun Cao, Igor Moskalenko","doi":"10.22323/1.444.0143","DOIUrl":"https://doi.org/10.22323/1.444.0143","url":null,"abstract":"Recent measurements of primary and secondary CR spectra, their arrival directions, and our improved knowledge of the magnetic field geometry around the heliosphere allow us to set a bound on the distance beyond which a puzzling 10-TeV\"bump\"cannot originate. The sharpness of the spectral breaks associated with the bump, the abrupt change of the CR intensity across the local magnetic equator ($90^{circ}$ pitch angle), and the similarity between the primary and secondary CR spectral patterns point to a local reacceleration of the bump particles out of the background CRs. We argue that a nearby shock may generate such a bump by increasing the rigidity of the preexisting CRs below 50 TV by a mere factor of ~1.5. Reaccelerated particles below ~0.5 TV are convected with the interstellar medium flow and do not reach the Sun, thus creating the bump. This single universal process is responsible for the observed spectra of all CR species in the rigidity range below 100 TV. We propose that one viable candidate is the system of shocks associated with Epsilon Eridani star at 3.2 pc of the Sun, which is well aligned with the direction of the local magnetic field. Other shocks, such as old supernova shells, may produce a similar effect. We provide a simple formula that reproduces the spectra of all CR species with only three parameters uniquely derived from the CR proton data. We show how our formalism predicts helium and carbon spectra and the B/C ratio.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127791196","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

First results of LHC neutrinos with FASERnu 使用FASERnu的LHC中微子的第一个结果

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1224

O. Sato

引用次数: 0

MeV gamma-ray all-sky simulation MeV伽马射线全天模拟

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0664

N. Tsuji

引用次数: 0

Neutrino emission from NGC1068: looking at the contribution of the kiloparsec jet NGC1068的中微子发射:观察千秒差距喷流的贡献

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1221

A. Marinelli, David Raudales, A. Ambrosone, M. Chianese, D. Fiorillo, P. Grandi, G. Miele, José Rodrigo Sacahui, E. Torresi

{"title":"Neutrino emission from NGC1068: looking at the contribution of the kiloparsec jet","authors":"A. Marinelli, David Raudales, A. Ambrosone, M. Chianese, D. Fiorillo, P. Grandi, G. Miele, José Rodrigo Sacahui, E. Torresi","doi":"10.22323/1.444.1221","DOIUrl":"https://doi.org/10.22323/1.444.1221","url":null,"abstract":"The IceCube telescope recently found an excess of 79 track-like neutrino events at TeV energies correlated with NCG1068 position (equivalent to a signiﬁcance of 4.2 sigmas). Considering that NGC1068 presents a core with a high star-formation rate and hosts an active galactic nucleus, these observations can be the result of diﬀerent emitting regions. A recent work based on Atacama Large Millimeter Array (ALMA) data describes the characteristics of the kiloparsec jet associated to this AGN identifying 4 major blobs on its head. In this proceeding we describe the possible non-thermal emission associated with this jet and the bright blobs obtaining their physical parameters from the ALMA observations as well as from the electromagnetic spectral energy distribution (SED). Moreover a lepto-hadronic and a hadronic scenarios have been explored: for the former we associate the electromagnetic SED with the leptonic emission from the blobs, using the synchrotron radiation as the target for the cosmic rays accelerated in the jet or in the observed blobs; for the latter we consider the gas environment around the head of the jet as the molecular target for the accelerated cosmic rays (CRs). We compute neutrino emission implied by these two scenarios and compared it with the IceCube observations for this Seyfert galaxy. We show that a multi-component description of non-thermal emission can’t exclude the observed kiloparsec jet from the main emitting regions.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"284 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125031775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The SENSEI Experiment: sub-GeV dark matter searches with skipper-CCDs SENSEI实验:用skip - ccd搜索亚gev暗物质

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1398

A. Botti

引用次数: 1

The Compton Pair telescope: A prototype for a next-generation MeV gamma-ray observatory 康普顿对望远镜:下一代MeV伽玛射线天文台的原型

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0857

J. Valverde, N. Kirschner, Z. Metzler, L. Smith, N. Cannady, R. Caputo, C. Kierans, I. Liceaga-Indart, A. Moiseev, L. Parker, M. Sasaki, A. Schoenwald, D. Shy, S. Wasti, R. Woolf, A. Bolotnikov, G. Carini, A. W. Crosier, T. Caligure, A. Dellapenna, J. Fried, P. Ghosh, S. Griffin, J. Grove, E. Hays, S. Herrmann, E. Kong, J. Mcenery, J. Mitchell, J. Perkins, B. Phlips, C. Sleator, E. Wulf, A. Zajczyk

{"title":"The Compton Pair telescope: A prototype for a next-generation MeV gamma-ray observatory","authors":"J. Valverde, N. Kirschner, Z. Metzler, L. Smith, N. Cannady, R. Caputo, C. Kierans, I. Liceaga-Indart, A. Moiseev, L. Parker, M. Sasaki, A. Schoenwald, D. Shy, S. Wasti, R. Woolf, A. Bolotnikov, G. Carini, A. W. Crosier, T. Caligure, A. Dellapenna, J. Fried, P. Ghosh, S. Griffin, J. Grove, E. Hays, S. Herrmann, E. Kong, J. Mcenery, J. Mitchell, J. Perkins, B. Phlips, C. Sleator, E. Wulf, A. Zajczyk","doi":"10.22323/1.444.0857","DOIUrl":"https://doi.org/10.22323/1.444.0857","url":null,"abstract":"The Compton Pair (ComPair) telescope is a prototype that aims to develop the necessary technologies for future medium energy gamma-ray missions and to design, build, and test the prototype in a gamma-ray beam and balloon flight. The ComPair team has built an instrument that consists of 4 detector subsystems: a double-sided silicon strip detector Tracker, a novel high-resolution virtual Frisch-grid cadmium zinc telluride Calorimeter, and a high-energy hodoscopic cesium iodide Calorimeter, all of which are surrounded by a plastic scintillator anti-coincidence detector. These subsystems together detect and characterize photons via Compton scattering and pair production, enable a veto of cosmic rays, and are a proof-of-concept for a space telescope with the same architecture. A future medium-energy gamma-ray mission enabled through ComPair will address many questions posed in the Astro2020 Decadal survey in both the New Messengers and New Physics and the Cosmic Ecosystems themes. In this contribution, we will give an overview of the ComPair project and steps forward to the balloon flight.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129602816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Light Dark Matter in a Blazar-heated Universe 耀变体热宇宙中的轻暗物质

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1448

Dr Oindrila Ghosh, Sankalan Bhattacharyya

{"title":"Light Dark Matter in a Blazar-heated Universe","authors":"Dr Oindrila Ghosh, Sankalan Bhattacharyya","doi":"10.22323/1.444.1448","DOIUrl":"https://doi.org/10.22323/1.444.1448","url":null,"abstract":"Prompt emissions from TeV blazars pair produce off the extragalactic background light and the highly energetic resulting pair beams then cascade through inverse Compton scattering to give rise to secondary gamma-rays. Such reprocessed cascade emission that can be associated with individual blazar sources has not been detected thus far. The absence of pair halos around these sources, along with the non-observation of isotropic gamma-ray background excess, seems to suggest that collective plasma effects, such as beam-plasma instabilities, can play a crucial role in alleviating this GeV-TeV tension by transferring the energy from the pair beams into the background plasma of the intergalactic medium (IGM). This has profound implications not only for TeV astrophysics, but also the strength of the intergalactic magnetic field and properties of dark matter (DM). A direct consequence of the instability losses and IGM heating is the modification of thermal history at late times, which suppresses structure formation particularly in baryonically underdense regions, potentially holding a clue towards resolving the small-scale crisis in cosmology. In a blazar-heated universe, the observation of dwarf galaxies and Lyman-$alpha$ measurements present a favoured mass range for DM candidates such as light axion-like particles.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"9 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122384641","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Optical-Infrared Searches for Identifying the IceCube High-Energy Neutrino Sources 识别冰立方高能中微子源的光学红外搜索

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1559

T. Morokuma

{"title":"Optical-Infrared Searches for Identifying the IceCube High-Energy Neutrino Sources","authors":"T. Morokuma","doi":"10.22323/1.444.1559","DOIUrl":"https://doi.org/10.22323/1.444.1559","url":null,"abstract":"We present our follow-up observations in optical and infrared wavelengths to identify electro-magnetic (EM) counterparts of high-energy neutrinos detected with the IceCube experiment. Our observing facilities include a wide range of telescope apertures from small-size ( ∼ 0 . 5m) to the largest-size ( ∼ 8m) in the world. Unique wide-field instruments are also utilized; Hyper Suprime-Cam (1.8 deg 2 field-of-view) on the 8.2-m Subaru telescope and Tomo-e Gozen (20 deg 2 field-of-view) on the 1.05-m Kiso Schmidt telescope. We first aim for searching for candidates of highly variable blazars (including those with red optical colors dominated by their host galaxies rather than blazar components), peculiar supernovae (SNe), and tidal disruption events (TDEs). We also conduct follow-up spectroscopic observations to identify the nature and determine the redshift of the candidates to claim the coincidence of the source with the neutrino detection. We successfully identified the EM counterpart of the high-energy neutrino IceCube-170922A, TXS 0506+056, with quick detection of the rapid near-infrared brightness change with HONIR on the 1.5-m Kanata telescope. After this variability detection in addition to the Fermi/LAT flux increase, world-wide follow-up observations were intensively conducted and the coincidence with the neutrino detection was found. We found that TXS 0506+056 showed a large-amplitude ( ∼ 1 . 0 mag) variability in >several-day time scale or longer with the bluer-when-brighter trend, although no significant variability was detected in a time scale of < 1-day. Structure function analyses indicate that TXS 0506+056 is not","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125447005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Galactic cosmic-rays and habitable planets 银河宇宙射线和宜居行星

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0441

R. Brose, M. Filipović

{"title":"Galactic cosmic-rays and habitable planets","authors":"R. Brose, M. Filipović","doi":"10.22323/1.444.0441","DOIUrl":"https://doi.org/10.22323/1.444.0441","url":null,"abstract":"The question if there is life on other planets has fueled a decade full of exciting discoveries in the field of exo-planet research. The number of known exoplanets has grown beyond 5,000 till today and with the launch of the James Webb Space Telescope, we are now able to probe the atmospheres of the most nearby systems directly, allowing to search for tracers of life. However, most of the current approaches of finding life are based on a “follow-the-water” strategy. Here, we present a different approach by studying the impact of Galactic cosmic-rays (CRs) on potentially habitable planets around Sun-like stars. Most of the CRs that interact with the Earth’s atmosphere originate directly from the Sun. Due to their low-energy they get absorbed high in the atmosphere and contribute little to the radiation-dose we receive at the surface. On the other hand, the Galactic CR spectrum extends to much higher energies allowing the particle-induced cascades to reach ground level and directly impact life. The detection of very-high energy gamma-ray emission from stellar clusters has increased number of source classes known to accelerate cosmic-rays at least up into the TeV domain to four. We use observational data of the gamma-ray emission from Supernova remnants, colliding-wind binaries, young and massive stellar clusters and the Galactic center to infer the CR density around these sources and determine distances up too which life gets affected by the produced CRs for a “twin” of our solar system.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129363693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0