Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy

Radio source evolution and the interplay with the host galaxy 射电源演化和与宿主星系的相互作用

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2019-02-27 DOI: 10.22323/1.329.0017

M. Perucho

引用次数: 2

A model of high-energy emission from jets of microquasars of Population III 星族III微类星体射流高能发射的模型

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2019-02-12 DOI: 10.22323/1.329.0021

P. S. Checa, G. Romero

{"title":"A model of high-energy emission from jets of microquasars of Population III","authors":"P. S. Checa, G. Romero","doi":"10.22323/1.329.0021","DOIUrl":"https://doi.org/10.22323/1.329.0021","url":null,"abstract":"Current research indicates that the radiation of the first stars alone would not have been suficient to ionize the intergalactic medium on long distances because of the high columnar density of the clouds in which they formed. It becomes necessary, then, to explore other alternatives for the reionization. The study of the contribution of the first accreting binary systems to the reionization and heating of the intergalactic medium requires the formulation of a concrete model for the first microquasars. We aim at constructing a consistent model for jets of microquasars where the donor star is of Population III. We calculate the spectral energy distribution of the radiation produced by the relativistic particles in the jets, within the framework of a lepto-hadronic model. In addition, we study the interaction between the jets and the early intergalactic medium. All calculations have been computed for a cosmological redshift value z = 10. We determine that jets of microquasars of Population III are sources of intense gamma radiation in regions of particle acceleration near the compact object and in the terminal jets.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130863778","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

Revealing the Nature and Location of High Energy Emission in the Candidate Binary SMBH System OJ 287 揭示候选双星系统oj287中高能发射的性质和位置

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2019-01-30 DOI: 10.22323/1.329.0022

P. Kushwaha, E. Pino, Alok C. Gupta, P. C. I. O. Astronomy, S. Paulo., B. Aries, Nainital, India Department of Physics, The State University of New Jersey, Nj, Usa

{"title":"Revealing the Nature and Location of High Energy Emission in the Candidate Binary SMBH System OJ 287","authors":"P. Kushwaha, E. Pino, Alok C. Gupta, P. C. I. O. Astronomy, S. Paulo., B. Aries, Nainital, India Department of Physics, The State University of New Jersey, Nj, Usa","doi":"10.22323/1.329.0022","DOIUrl":"https://doi.org/10.22323/1.329.0022","url":null,"abstract":"The latest flare of the regular $sim$ 12 years quasi-periodic optical outbursts in the binary SMBH candidate system OJ 287 occurred in December 2015. Following this, the source has exhibited enhanced multi-wavelength (MW) variability in spectral, temporal and polarization domains with new features never seen before. Our MW investigation show that the overall MW variability can be divided into two-phase, (i) November 2015 -- May 2016 with variability from near-infrared (NIR) to Fermi-LAT $rm gamma$-ray energies (0.1 -- 300 GeV), and (ii) September 2016 -- July 2017 with intense NIR to X-ray variability but without any activity in the Fermi-LAT band, and the very first detection at very high energies (VHEs, E $>$ 100 GeV) by VERITAS. The broadband SEDs during the first phase show a thermal bump in the NIR-optical region and a hardening in the $rm gamma$-ray spectra with a shift in its peak. The thermal bump like feature is consistent with the description of the standard accretion-disk associated with the primary SMBH of mass $sim 1.8times10^{10} M_odot$ while the $rm gamma$-ray emission can be naturally reproduced by inverse Compton scattering of photons from the broad line region which has been seen during the close encounter duration of the binary SMBHs, thereby suggesting a sub-parsec scale origin. The SEDs during the second phase (VHE detection) is a mixture of typical OJ 287 SED with hardened $rm gamma$-ray spectra and an HBL SED and can be explained in a two-zone model, one located at sub-parsec scales and other at parsec scales. During both the phases, the MW variability is simultaneous and almost always accompanied by changes in the polarization properties, exhibiting random and systematic variations, suggesting a strong role of magnetic field and turbulence.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128677006","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: 3

Black Holes as Cosmic Dynamos 黑洞是宇宙的发电机

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2019-01-16 DOI: 10.22323/1.329.0025

R. Blandford

{"title":"Black Holes as Cosmic Dynamos","authors":"R. Blandford","doi":"10.22323/1.329.0025","DOIUrl":"https://doi.org/10.22323/1.329.0025","url":null,"abstract":"An introduction is given to a meeting on the role of massive and stellar black holes in powering non-thermal activity in a rich variety of cosmic sources. Relevant properties of magnetized, spinning black holes are summarized and their observational expression, within galactic nuclei, in terms of radio loudness and Fanaroff-Riley class, is briefly described. The dependence of the accretion mode on the rate and manner of the mass supply beyond the black hole sphere of influence is also discussed. It is argued that hydromagnetic outflows from accretion disks are generally expected over as many as six decades of radius and that they may be the source of emission line gas. These outflows collimate the relativistic jets which are probably generated in an electromagnetic form but become hydromagnetic as they entrain gas through boundary layers where most of the initial nonthermal emission occurs. It is proposed that the particle acceleration close to the hole emphasizes the proton channel which allows secondary pairs to be created at far higher energies than is possible from direct acceleration. These pairs radiate synchrotron gamma-rays which can escape along the jet because the outflow effectively shields them from pair-producing, soft photons. Jets are subject to helical instabilities which can tangle their magnetic field and may destroy them. The jet should become plasma-dominated through intermittent, \"magnetoluminescent\" untangling of the field which causes nonthermal emission all along its length. Powerful jets remain supersonic out to the \"hot spots\" at the extremities of the source; weaker jets become subsonic plumes or bubbles. The prospects for learning much more about the nature and operation of jets over the next decade are excellent.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122946917","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 optical depth including Lorentz invariance violation energy threshold shifts 光学深度包含洛伦兹不变性违反，能量阈值移位

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2019-01-10 DOI: 10.22323/1.329.0010

H. Mart'inez-Huerta, R. Lang, V. Souza

引用次数: 4

Use of a small photomultiplier tube to extend the dynamic range of the surface detectors of the Pierre Auger Observatory 利用小型光电倍增管扩展皮埃尔·奥格天文台表面探测器的动态范围

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2018-09-01 DOI: 10.22323/1.329.0002

A. Payeras, A. Fauth

{"title":"Use of a small photomultiplier tube to extend the dynamic range of the surface detectors of the Pierre Auger Observatory","authors":"A. Payeras, A. Fauth","doi":"10.22323/1.329.0002","DOIUrl":"https://doi.org/10.22323/1.329.0002","url":null,"abstract":"The Pierre Auger Observatory was built in Argentina to study cosmic rays with energy larger than 0.1 EeV. It applies two independent and complementary techniques to detect extensive air showers: an array of water-Cherenkov detectors (WCDs) and a set of fluorescence telescopes. About 40% of the events detected with the water-Cherenkov detectors, for energies larger than 30 EeV, present saturation. The installation of an additional photomultiplier tube (PMT) with a small cathode area in the WCDs was proposed to overcome this saturation. We analysed data from ten experimental WCDs equipped with small PMTs. We showed that the small PMTs can be calibrated using the standard PMTs. The mean calibration uncertainty was within 5% and the calibration becomes more accurate for larger signals. A correlation of the calibration with long-term variations of temperature was found. Finally, we showed that the implementation of the small PMTs extended the dynamic range of the WCDs by a factor of 25 times, which reduced the overall saturation occurance from 6% to less than 0.1%.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132742823","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

First detection of the FSRQ TON 0599 in the VHE regime 在VHE体系中首次发现FSRQ TON 0599

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2018-09-01 DOI: 10.22323/1.329.0013

Joe Hirako, T. Terzić, A. Stamerra, F. Tavecchio, C. Righi, C. Raiteri, L. Pacciani

{"title":"First detection of the FSRQ TON 0599 in the VHE regime","authors":"Joe Hirako, T. Terzić, A. Stamerra, F. Tavecchio, C. Righi, C. Raiteri, L. Pacciani","doi":"10.22323/1.329.0013","DOIUrl":"https://doi.org/10.22323/1.329.0013","url":null,"abstract":"TON 0599 is the seventh flat spectrum radio quasar (FSRQ) detected so far in the very high energy (VHE, E > 100 GeV) regime. The VHE gamma-ray emission was discovered on December 2017 with the MAGIC telescopes, making TON 0599 the third farthest source (z = 0.72) in the VHE sky. The MAGIC observation was triggered by a hardening of the high energy (HE, E > 100 MeV) gamma-ray spectrum observed with Fermi-LAT and during one hour, the flux reached 40 per cent of the Crab Nebula flux above 80 GeV. Observations continued for two weeks, with a gradual decrease of the flux. The simultaneous VHE (MAGIC) and HE (Fermi) gamma-ray spectra connect smoothly. The joint spectrum shows a sudden drop above ∼ 8 GeV, which may suggest a strong absorption of the VHE gamma rays within the source, and intra-day spectral variations. MAGIC data provide a unique opportunity to investigate these variations during a flaring episode and peek into the structure of FSRQs. We round the multiwavelength picture with observations in optical, IR, and radio bands acquired by the WEBT collaboration during the whole 2017-2018 optical observing season, from November to May.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"27 20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116865830","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

Supermassive and Intermediate-Mass Black Hole Growth at Galaxy Centers and resulting Feedback using Cosmological Simulations 星系中心的超大质量和中等质量黑洞的生长以及使用宇宙学模拟产生的反馈

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2018-09-01 DOI: 10.22323/1.329.0023

P. Barai, E. Pino

{"title":"Supermassive and Intermediate-Mass Black Hole Growth at Galaxy Centers and resulting Feedback using Cosmological Simulations","authors":"P. Barai, E. Pino","doi":"10.22323/1.329.0023","DOIUrl":"https://doi.org/10.22323/1.329.0023","url":null,"abstract":"Accretion of matter onto central Black Holes (BHs) in galaxies liberates enormous amounts of feedback energy, which influence the formation and evolution of structures, affecting the environment from pc to Mpc scales. These BHs are usually Supermassive BHs (SMBHs: mass $geq 10^6 M_{odot}$) existing at the centers of active galactic nuclei (AGN), which are widely observed through their multi-wavelength emission at all cosmic epochs. The SMBH energy output is often observed as powerful AGN outflows in a wide variety of forms. Relatively recently, Intermediate-Mass BHs (IMBHs: mass = $100 - 10^6 M_{odot}$) have started to be observed hosted in Dwarf Galaxy (DG) centers. Some of the central IMBHs in DGs show signatures of activity in the form of low-luminosity AGN. We have performed Cosmological Hydrodynamical Simulations to probe SMBHs in high-z quasars (Barai et al. 2018), and IMBHs in DGs (Barai & de Gouveia Dal Pino 2019). Our simulations employ the 3D TreePM SPH code GADGET-3, and include metal cooling, star formation, chemical enrichment, stellar evolution, supernova feedback, AGN accretion and feedback. Analyzing the simulation output in post-processing, we investigate the growth of the first IMBHs, and the growth of the first SMBHs, their impact on star-formation, as well as their co-evolution with the respective host galaxies. We quantify the impact of SMBHs and IMBHs on their host galaxies, especially the effects on quenching star-formation. We also study the corresponding BH outflow properties.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115461151","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

A Cosmic Battery in accretion flows around astrophysical black holes 宇宙电池在天体物理黑洞周围的吸积流动

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2018-09-01 DOI: 10.22323/1.329.0012

I. Contopoulos

引用次数: 0

Numerical models of neutrino and gamma-ray emission from magnetic reconnection in the core of radio-galaxies 射电星系核心磁重联中中微子和伽马射线发射的数值模型

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018) Pub Date : 2018-09-01 DOI: 10.22323/1.329.0014

J. C. Rodr'iguez-Ram'irez, E. Pino, R. A. Batista

{"title":"Numerical models of neutrino and gamma-ray emission from magnetic reconnection in the core of radio-galaxies","authors":"J. C. Rodr'iguez-Ram'irez, E. Pino, R. A. Batista","doi":"10.22323/1.329.0014","DOIUrl":"https://doi.org/10.22323/1.329.0014","url":null,"abstract":"Non-blazar radio-galaxies emitting in the very-high-energy (VHE; >100 GeV) regime offer a unique perspective for probing particle acceleration and emission processes in black hole (BH) accretion-jet systems. The misaligned nature of these sources indicates the presence of an emission component that could be of hadronic origin and located in the core region. Here we consider turbulent magnetic reconnection in the BH accretion flow of radio-galaxies as a potential mechanism for cosmic-ray (CR) acceleration and VHE emission. To investigate if this scenario is able to account for the observed VHE data, we combine three numerical techniques to self-consistently model the accretion flow environment and the propagation of CRs plus electromagnetic cascades within the accretion flow zone. Here we apply our approach to the radio-galaxy Centaurus A and find that injection of CRs consistent with magnetic reconnection power partially reproduce the VHE data, provided that the accretion flow makes no substantial contribution to the radio-GeV components. The associated neutrino emission peaks at $sim10^{16}$ eV and is two orders of magnitude below the minimum IceCube flux.","PeriodicalId":416656,"journal":{"name":"Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127827838","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: 2

Proceedings of International Conference on Black Holes as Cosmic Batteries: UHECRs and Multimessenger Astronomy — PoS(BHCB2018)最新文献