THE CONTRIBUTION OF FERMI-2LAC BLAZARS TO DIFFUSE TEV-PEV NEUTRINO FLUX

被引:210
作者
Aartsen, M. G. [1 ]
Abraham, K. [2 ]
Ackermann, M. [3 ]
Adams, J. [4 ]
Aguilar, J. A. [5 ]
Ahlers, M. [6 ,7 ]
Ahrens, M. [8 ,9 ]
Altmann, D. [10 ]
Andeen, K. [11 ]
Anderson, T. [12 ]
Ansseau, I. [5 ]
Anton, G. [10 ]
Archinger, M. [13 ]
Arguelles, C. [14 ]
Arlen, T. C. [12 ]
Auffenberg, J. [15 ]
Axani, S. [14 ]
Bai, X. [16 ]
Barwick, S. W. [17 ]
Baum, V. [13 ]
Bay, R. [18 ]
Beatty, J. J. [19 ,20 ,21 ]
Tjus, J. Becker [22 ]
Becker, K. -H. [23 ]
BenZvi, S. [24 ]
Berghaus, P. [25 ]
Berley, D. [26 ]
Bernardini, E. [3 ]
Bernhard, A. [2 ]
Besson, D. Z. [27 ]
Binder, G. [18 ,28 ]
Bindig, D. [23 ]
Bissok, M. [15 ]
Blaufuss, E. [26 ]
Blot, S. [3 ]
Boersma, D. J. [29 ]
Bohm, C. [8 ,9 ]
Boerner, M. [30 ]
Bos, F. [22 ]
Bose, D. [31 ]
Boeser, S. [13 ]
Botner, O. [29 ]
Braun, J. [6 ,7 ]
Brayeur, L. [32 ]
Bretz, H. -P. [3 ]
Burgman, A. [29 ]
Casey, J. [33 ,34 ]
Casier, M. [32 ]
Cheung, E. [26 ]
Chirkin, D. [6 ,7 ]
机构
[1] Univ Adelaide, Dept Phys, Adelaide, SA 5005, Australia
[2] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
[3] DESY, D-15735 Zeuthen, Germany
[4] Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch, New Zealand
[5] Univ Libre Bruxelles, Fac Sci, CP230, B-1050 Brussels, Belgium
[6] Univ Wisconsin, Dept Phys, Madison, WI 53706 USA
[7] Univ Wisconsin, Wisconsin IceCube Particle Astrophys Ctr, Madison, WI 53706 USA
[8] Stockholm Univ, Oskar Klein Ctr, SE-10691 Stockholm, Sweden
[9] Stockholm Univ, Dept Phys, SE-10691 Stockholm, Sweden
[10] Friedrich Alexander Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, D-91058 Erlangen, Germany
[11] Marquette Univ, Dept Phys, Milwaukee, WI 53201 USA
[12] Penn State Univ, Dept Phys, University Pk, PA 16802 USA
[13] Johannes Gutenberg Univ Mainz, Inst Phys, Staudinger Weg 7, D-55099 Mainz, Germany
[14] MIT, Dept Phys, Cambridge, MA 02139 USA
[15] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany
[16] South Dakota Sch Mines & Technol, Dept Phys, Rapid City, SD 57701 USA
[17] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[18] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[19] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[20] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA
[21] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA
[22] Ruhr Univ Bochum, Fac Phys & Astron, D-44780 Bochum, Germany
[23] Univ Wuppertal, Dept Phys, D-42119 Wuppertal, Germany
[24] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA
[25] Natl Res Nucl Univ MEPhI, Moscow Engn Phys Inst, Moscow, Russia
[26] Univ Maryland, Dept Phys, College Pk, MD 20742 USA
[27] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA
[28] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
[29] Uppsala Univ, Dept Phys & Astron, Box 516, SE-75120 Uppsala, Sweden
[30] TU Dortmund Univ, Dept Phys, D-44221 Dortmund, Germany
[31] Sungkyunkwan Univ, Dept Phys, Suwon 440746, South Korea
[32] Vrije Univ Brussel, Dienst ELEM, B-1050 Brussels, Belgium
[33] Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA
[34] Georgia Inst Technol, Ctr Relativist Astrophys, Atlanta, GA 30332 USA
[35] Univ Geneva, Dept Phys Nucl & Corpusculaire, CH-1211 Geneva, Switzerland
[36] Univ Toronto, Dept Phys, Toronto, ON M5S 1A7, Canada
[37] Westfalische Wilhelms Univ Munster, Inst Kernphys, D-48149 Munster, Germany
[38] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA
[39] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
[40] Univ Delaware, Bartol Res Inst, Newark, DE 19716 USA
[41] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA
[42] Univ Ghent, Dept Phys & Astron, B-9000 Ghent, Belgium
[43] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany
[44] Southern Univ, Dept Phys, Baton Rouge, LA 70813 USA
[45] Chiba Univ, Dept Phys, Chiba 2638522, Japan
[46] Univ Wisconsin, Dept Astron, Madison, WI 53706 USA
[47] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada
[48] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark
[49] Univ Bonn, Inst Phys, Nussallee 12, D-53115 Bonn, Germany
[50] Univ Tokyo, Earthquake Res Inst, Bunkyo Ku, Tokyo 1130032, Japan
基金
瑞典研究理事会; 美国国家科学基金会; 瑞士国家科学基金会; 新加坡国家研究基金会; 澳大利亚研究理事会; 加拿大自然科学与工程研究理事会;
关键词
astroparticle physics; BL Lacertae objects: general; gamma rays: galaxies; methods: data analysis; neutrinos; quasars: general; ACTIVE GALACTIC NUCLEI; HIGH-ENERGY NEUTRINOS; BL-LAC OBJECTS; SIMPLIFIED VIEW; 2ND CATALOG; RADIO; DISTRIBUTIONS; SELECTION; EMISSION; GALAXIES;
D O I
10.3847/1538-4357/835/1/45
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The recent discovery of a diffuse cosmic neutrino flux extending up to PeV energies raises the question of which astrophysical sources generate this signal. Blazars are one class of extragalactic sources which may produce such high-energy neutrinos. We present a likelihood analysis searching for cumulative neutrino emission from blazars in the 2nd Fermi-LAT AGN catalog (2LAC) using IceCube neutrino data set 2009-12, which was optimized for the detection of individual sources. In contrast to those in previous searches with IceCube, the populations investigated contain up to hundreds of sources, the largest one being the entire blazar sample in the 2LAC catalog. No significant excess is observed, and upper limits for the cumulative flux from these populations are obtained. These constrain the maximum contribution of 2LAC blazars to the observed astrophysical neutrino flux to 27% or less between around 10 TeV and 2 PeV, assuming the equipartition of flavors on Earth and a single power-law spectrum with a spectral index of -2.5. We can still exclude the fact that 2LAC blazars (and their subpopulations) emit more than 50% of the observed neutrinos up to a spectral index as hard as -2.2 in the same energy range. Our result takes into account the fact that the neutrino source count distribution is unknown, and it does not assume strict proportionality of the neutrino flux to the measured 2LAC gamma-ray signal for each source. Additionally, we constrain recent models for neutrino emission by blazars.
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页数:17
相关论文
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