Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)最新文献_第4页

Constraints to axion-like particles with the Perseus Galaxy Cluster with MAGIC 英仙座星系团对类轴子粒子的约束

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1442

Giacomo D’Amico, H. Abe, Shotaro Abe, Jayant Abhir, V. Acciari, I. Agudo, T. Aniello, S. Ansoldi, L. Antonelli, A. Arbet Engels, C. Arcaro, M. Artero, K. Asano, D. Baack, A. Babić, A. Baquero, U. Barres de Almeida, J. A. Barrio, I. Batković, J. Baxter, J. Becerra González, W. Bednarek, E. Bernardini, M. Bernardos, J. Bernete, A. Berti, J. Besenrieder, C. Bigongiari, A. Biland, O. Blanch, G. Bonnoli, Ž. Bošnjak, I. Burelli, G. Busetto, A. Campoy-Ordaz, A. Carosi, R. Carosi, M. Carretero-Castrillo, A. Castro-Tirado, G. Ceribella, Yating Chai, A. Chilingarian, A. Cifuentes, S. Cikota, E. Colombo, J. Contreras, J. Cortina, S. Covino, V. D’Elia, P. Da Vela, F. Dazzi, A. De Angelis, B. De Lotto, A. Del Popolo, M. Delfino, J. Delgado, C. Delgado Mendez, D. Depaoli, F. Di Pierro, L. Di Venere, D. Dominis Prester, A. Donini, D. Dorner, M. Doro, D. Elsaesser, G. Emery, J. Escudero, Luis Fariña, A. Fattorini, L. Foffano, L. Font, S. Fröse, S. Fukami, Y. Fukazawa, R. Garcia Lopez, M. Garczarczyk, S. Gasparyan, M. Gau

引用次数: 1

Gamma-ray emission from young supernova remnants in dense environments 稠密环境中年轻超新星残骸的伽马射线发射

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0855

R. Brose, I. Sushch, J. Mackey

{"title":"Gamma-ray emission from young supernova remnants in dense environments","authors":"R. Brose, I. Sushch, J. Mackey","doi":"10.22323/1.444.0855","DOIUrl":"https://doi.org/10.22323/1.444.0855","url":null,"abstract":"Supernova remnants are known to accelerate cosmic rays on account of their non-thermal emission in different wavebands. However, evidence that SNRs do indeed accelerate cosmic rays to PeV-energies is elusive. The idea emerged that PeV-energies might only be reached during the very initial stages of a remnant’s evolution. Unfortunately, early gamma-ray emission is strongly attenuated by 𝛾𝛾 -absorption. Here, we investigate how the interaction of SNR-shocks with dense structures in the medium around luminous blue variable (LBV) and Red Supergiant (RSG) stars can boost the gamma-ray emission later. We use the time-dependent acceleration code RATPaC to study the acceleration of cosmic rays in supernovae expanding into dense environments around massive stars. We investigated typical parameters of the circumstellar medium (CSM) in the freely expanding winds and added dense structures that arise from episodes of highly-enhanced mass-loss of LBVs and photoionized shells around RSGs. We find that the interactions with the dense structures happens typically after a few months for LBV progenitors and a few years for RSG progenitors. During the interaction stage, the 𝛾𝛾 -absorption by photons emitted from the Supernova’s photosphere became negligible. The gamma-ray luminosity of the interacting SNRs can surpass the internal/unabsorbed peak-luminosity that arises shortly after the explosion. Further, the change of the shock-speed during the shock-shell interaction boosts the achievable maximum energy beyond a PeV for LBVs, where early interactions yield higher peak-energies. The later","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"1 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":"129288361","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

Constraining Cosmic-Ray Transport through Synthetic Observations of the Circumgalactic Medium 通过环银河系介质的综合观测约束宇宙射线输运

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.1596

S. Ponnada, Iryna S. Butsky, P. Hopkins

{"title":"Constraining Cosmic-Ray Transport through Synthetic Observations of the Circumgalactic Medium","authors":"S. Ponnada, Iryna S. Butsky, P. Hopkins","doi":"10.22323/1.444.1596","DOIUrl":"https://doi.org/10.22323/1.444.1596","url":null,"abstract":"Cosmic-rays have been found to be potentially of great importance in galaxy formation in recent theoretical work. By establishing a substantial source of non-thermal pressure support in the circum-galactic medium (CGM), cosmic-rays alter the phase structure and spatial distribution of gas in the CGM, with notable ensuing effects on the star formation histories of galaxies. However, these effects rely heavily on the transport rate of cosmic-rays from the interstellar medium (ISM) into the CGM, and there remain order-of-magnitude uncertainties in the value of the macroscopic cosmic-ray diffusion coefficient from different plausible physical models. To place constraints on these theoretical models, we use high-resolution, magneto-hydrodynamic, cosmological simulations of galaxy formation from the Feedback in Realistic Environments (FIRE) project, and post process them with a novel code to compute the expected non-thermal synchrotron emission from the inner halo of these galaxies. By forward modeling the emission from simulations of galaxy formation which self-consistently evolve cosmic-rays, we are able to explore differences between models in non-thermal emission and place new constraints on models for cosmic-ray transport which may be investigated via future radio continuum observing missions.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"1 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":"114154564","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

Detector Simulation Studies for the proposed Gamma-Ray and AntiMatter Survey (GRAMS) 伽玛射线和反物质巡天(GRAMS)探测器模拟研究

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0795

Mihir Shetty

引用次数: 0

Cosmic-ray air-shower simulations across the ankle: Combining mixed Galactic composition with new Physics above 50 TeV 宇宙射线空气阵雨模拟横跨脚踝:结合混合星系成分与新物理高于50 TeV

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0495

S. Romanopoulos

{"title":"Cosmic-ray air-shower simulations across the ankle: Combining mixed Galactic composition with new Physics above 50 TeV","authors":"S. Romanopoulos","doi":"10.22323/1.444.0495","DOIUrl":"https://doi.org/10.22323/1.444.0495","url":null,"abstract":"Cosmic rays (CRs) with energies below 10 18 electron volts (eV) are believed to be atomic nuclei originating from within our Galaxy, while there is a transition to extragalactic cosmic rays occurring around 10 18 eV. The characterization of this transition is important for understanding new physics phenomena proposed for Ultra-High Energy Cosmic Rays (UHECRs) with center-of-mass energies above 50 TeV. In this study, we conducted air-shower simulations using CORSIKA to investigate the energy range from just below the ankle (10 17 eV) up to the highest energies (10 20 eV), and compared our results with observations of the energy spectrum and composition obtained from the Auger experiment. To determine the flux and elemental ratios just below the ankle, we used data on the abundances and flux of low-energy cosmic ray components obtained from the KASCADE experiment. Due to confinement arguments, heavier nuclei exhibit greater bending in a given source and Galactic magnetic field, allowing them to reach higher energies for a given accelerator class. To account for this, we incorporated an exponential suppression term in the flux of heavier nuclei, which depends on their atomic number. Regarding extragalactic cosmic rays, we assumed a composition dominated by lighter elements; however, we also considered the presence of \"new physics\" effects at energies above 50 TeV, as discussed in our previous work Romanopoulos, Pavlidou, and Tomaras (2022) . Our analysis demonstrates that the observed penetration depth ( 𝑋 max ) and its standard deviation ( 𝜎 𝑋 max ) align well with our modeling of a Galactic CR composition below the ankle. Additionally, we found that the proposed new physics at a center-of-mass energy of 140 TeV requires a cross-section in the range of 752-836 mb and a multiplicity factor 1.7-3.6 times higher than predicted by the standard model","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"7 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":"127653377","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

Particle acceleration at reflected shocks in supernova remnants 超新星残骸中反射激波的粒子加速

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0262

I. Sushch, Jacobus Frederik Le Roux, R. Brose

{"title":"Particle acceleration at reflected shocks in supernova remnants","authors":"I. Sushch, Jacobus Frederik Le Roux, R. Brose","doi":"10.22323/1.444.0262","DOIUrl":"https://doi.org/10.22323/1.444.0262","url":null,"abstract":"Supernovae remnants (SNRs) are widely considered to be the prime sources of Galactic cosmic rays (CRs). The efficient particle acceleration at the shocks of SNRs is indirectly confirmed by the detection of non-thermal emission across the whole electromagnetic spectrum from radio to very-high-energy gamma-rays. About 80% of all SNRs originate from core-collapse events and are expected to expand into a complex environment of the stellar wind bubble blown up by their progenitor stars, where the forward shock might interact with various density inhomogeneities. Such interactions would cause the formation of reflected shocks propagating back into the remnant which can potentially be strong enough to accelerate particles. Current investigations of particle acceleration in SNRs are usually limited to forward and reverse shocks ignoring the complexity of the hydrodynamic picture. Although for most SNRs the observed shell-like morphology generally agrees with an idea that high energy particles originate predominantly from the forward shock, precise spatially resolved measurements do not always agree with this simplified picture. This work is focused on the investigation of particle acceleration at the reflected shocks formed through the interaction of the forward shock with density inhomogeneities and its potential impact on the overall observational properties.","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"123 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":"127057236","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

Fermi GBM Analysis of GRB 221009A GRB 221009A的Fermi GBM分析

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0882

S. Lesage

引用次数: 0

Systematic trends and variety of particle acceleration processes in supernova remnants as promising Galactic cosmic-ray accelerators 作为有希望的银河系宇宙射线加速器的超新星遗迹中粒子加速过程的系统趋势和变化

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0652

Hiromasa Suzuki

引用次数: 0

Observation of TeV gamma ray emissions from 12 UHE γ-ray Galactic sources with the LHAASO-WCDA 用lhaso - wcda观测12个UHE γ射线星系源的TeV γ射线发射

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0913

Chuandong Gao, Min Zha Zhiguo Yao Cunfeng Feng

引用次数: 0

SWGO site environment characterisation activities SWGO现场环境特征活动

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023) Pub Date : 2023-08-18 DOI: 10.22323/1.444.0313

L. Chytka, Abreu, Albert, Alfaro, Alfonso, Álvarez, An, Angüner, Arcaro, Arceo, Arias, Arnaldi, Assis, Ayala Solares, Bakalova, Barres de Almeida, Batković, Bazo, Bellido, Belmont, BenZvi, Bernal, Bian, Bigongiari, Bottacini, Brogueira, Bulik, Busetto, Caballero-Mora, Camarri, Campos, Cao, Capistrán, Cardillo, Carquin, Carramiñana, Castromonte, Chang, Chaparro, Chen, Chianese, Chiavassa, Chytka, Colallillo, Conceição, Consolati, Cordero, Costa, Cotzomi, Dasso, De Angelis’, Desiati, Di Pierro, Di Sciascio, Díaz Vélez, Dib, Dingus, Djuvsland, Dobrigkeit, Domingues Mendes, Dorigo, Doro, dos Reis, Du Vernois, Echiburú, Elsaesser, Engel, Ergin, Espinoza, Fang, Farfán Carreras, Fazzi, Feng, Feroci, Fraija, Franceschini, Franco, Funk, García, García-González, Garfías, Giacinti, Gibilisco, Glombitza, Goksu, Gong, González, Goodman, Gu, Guarino, Gupta, Haist, Hakobyan, Han, Hansen, Harding, Helô, Herzog, d. Hidalgo, Hinton, Hu, Huang, Huentemeyer, Hueyotl-Zahuantitla, Iriarte, Isaković, Isolia, Joshi, Juryšek, Kac

{"title":"SWGO site environment characterisation activities","authors":"L. Chytka, Abreu, Albert, Alfaro, Alfonso, Álvarez, An, Angüner, Arcaro, Arceo, Arias, Arnaldi, Assis, Ayala Solares, Bakalova, Barres de Almeida, Batković, Bazo, Bellido, Belmont, BenZvi, Bernal, Bian, Bigongiari, Bottacini, Brogueira, Bulik, Busetto, Caballero-Mora, Camarri, Campos, Cao, Capistrán, Cardillo, Carquin, Carramiñana, Castromonte, Chang, Chaparro, Chen, Chianese, Chiavassa, Chytka, Colallillo, Conceição, Consolati, Cordero, Costa, Cotzomi, Dasso, De Angelis’, Desiati, Di Pierro, Di Sciascio, Díaz Vélez, Dib, Dingus, Djuvsland, Dobrigkeit, Domingues Mendes, Dorigo, Doro, dos Reis, Du Vernois, Echiburú, Elsaesser, Engel, Ergin, Espinoza, Fang, Farfán Carreras, Fazzi, Feng, Feroci, Fraija, Franceschini, Franco, Funk, García, García-González, Garfías, Giacinti, Gibilisco, Glombitza, Goksu, Gong, González, Goodman, Gu, Guarino, Gupta, Haist, Hakobyan, Han, Hansen, Harding, Helô, Herzog, d. Hidalgo, Hinton, Hu, Huang, Huentemeyer, Hueyotl-Zahuantitla, Iriarte, Isaković, Isolia, Joshi, Juryšek, Kac","doi":"10.22323/1.444.0313","DOIUrl":"https://doi.org/10.22323/1.444.0313","url":null,"abstract":"The Southern Wide-field Gamma-ray Observatory (SWGO) project aims to build an array of air-shower detectors in the Southern hemisphere. Intensive site search activities are ongoing. We developed an Autonomous Environmental and Scientific SWGO Site Characterization Instrument (AEROSITE) to measure environmental characteristics of the proposed sites and deployed four of them in Argentina, Bolivia, Chile and Peru. The instruments are located at very high altitudes of","PeriodicalId":448458,"journal":{"name":"Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)","volume":"14 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":"125589038","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