Measurement of the Extragalactic Background Light Spectral Energy Distribution with VERITAS

Measurement of the Extragalactic Background Light Spectral Energy Distribution with VERITAS
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DOI：
10.3847/1538-4357/ab4817
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发表时间：
2019-10
期刊：
The Astrophysical Journal
影响因子：
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通讯作者：
A. Abeysekara;A. Archer;W. Benbow;R. Bird;A. Brill;R. Brose;M. Buchovecky;D. Calderon-Madera;J. Christiansen;W. Cui;W. Cui;M. Daniel;A. Falcone;Q. Feng;M. Fernández-Alonso;J. Finley;L. Fortson;A. Furniss;A. Gent;C. Giuri;O. Gueta;D. Hanna;T. Hassan;O. Hervet;J. Holder;G. Hughes;T. Humensky;C. Johnson;P. Kaaret;M. Kertzman;D. Kieda;M. Krause;F. Krennrich;S. Kumar;M. Lang;G. Maier;P. Moriarty;R. Mukherjee;M. Nievas-Rosillo;S. O’Brien;R. Ong;K. Pfrang;M. Pohl;R. Prado;E. Pueschel;J. Quinn;K. Ragan;P. Reynolds;D. Ribeiro;G. Richards;E. Roache;A. Rovero;I. Sadeh;M. Santander;G. Sembroski;K. Shahinyan;I. Sushch;T. Švraka;A. Weinstein;R. Wells;P. Wilcox;A. Wilhelm;D. Williams;T. Williamson;B. Zitzer
A. Abeysekara;A. Archer;W. Benbow;R. Bird;A. Brill;R. Brose;M. Buchovecky;D. Calderon-Madera;J. Christiansen;W. Cui;W. Cui;M. Daniel;A. Falcone;Q. Feng;M. Fernández-Alonso;J. Finley;L. Fortson;A. Furniss;A. Gent;C. Giuri;O. Gueta;D. Hanna;T. Hassan;O. Hervet;J. Holder;G. Hughes;T. Humensky;C. Johnson;P. Kaaret;M. Kertzman;D. Kieda;M. Krause;F. Krennrich;S. Kumar;M. Lang;G. Maier;P. Moriarty;R. Mukherjee;M. Nievas-Rosillo;S. O’Brien;R. Ong;K. Pfrang;M. Pohl;R. Prado;E. Pueschel;J. Quinn;K. Ragan;P. Reynolds;D. Ribeiro;G. Richards;E. Roache;A. Rovero;I. Sadeh;M. Santander;G. Sembroski;K. Shahinyan;I. Sushch;T. Švraka;A. Weinstein;R. Wells;P. Wilcox;A. Wilhelm;D. Williams;T. Williamson;B. Zitzer
中科院分区：
其他
文献类型：
--
作者：
A. Abeysekara;A. Archer;W. Benbow;R. Bird;A. Brill;R. Brose;M. Buchovecky;D. Calderon-Madera;J. Christiansen;W. Cui;W. Cui;M. Daniel;A. Falcone;Q. Feng;M. Fernández-Alonso;J. Finley;L. Fortson;A. Furniss;A. Gent;C. Giuri;O. Gueta;D. Hanna;T. Hassan;O. Hervet;J. Holder;G. Hughes;T. Humensky;C. Johnson;P. Kaaret;M. Kertzman;D. Kieda;M. Krause;F. Krennrich;S. Kumar;M. Lang;G. Maier;P. Moriarty;R. Mukherjee;M. Nievas-Rosillo;S. O’Brien;R. Ong;K. Pfrang;M. Pohl;R. Prado;E. Pueschel;J. Quinn;K. Ragan;P. Reynolds;D. Ribeiro;G. Richards;E. Roache;A. Rovero;I. Sadeh;M. Santander;G. Sembroski;K. Shahinyan;I. Sushch;T. Švraka;A. Weinstein;R. Wells;P. Wilcox;A. Wilhelm;D. Williams;T. Williamson;B. Zitzer

文献摘要

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河外背景光(EBL)是一种在光学和红外范围内的漫射光子场，它记录了宇宙历史上的辐射过程。在极高能量(&gt；100GeV)下对blazar的光谱测量能够重建EBL的光谱能量分布(SED)，因为blazar光谱被依赖于红移和能量的伽马射线光子与EBL的相互作用所修正。14个Veritas探测到的blazar的光谱被包括在一个新的EBL SED测量中，该测量独立于EBL SED模型。由此得到的表面能谱分布覆盖了0.56-56μm的EBL波长范围，并与假设EBL完全来自已编目星系的辐射所得到的下限很好地一致。
The extragalactic background light (EBL), a diffuse photon field in the optical and infrared range, is a record of radiative processes over the universe’s history. Spectral measurements of blazars at very high energies (>100 GeV) enable the reconstruction of the spectral energy distribution (SED) of the EBL, as the blazar spectra are modified by redshift- and energy-dependent interactions of the gamma-ray photons with the EBL. The spectra of 14 VERITAS-detected blazars are included in a new measurement of the EBL SED that is independent of EBL SED models. The resulting SED covers an EBL wavelength range of 0.56–56 μm, and is in good agreement with lower limits obtained by assuming that the EBL is entirely due to radiation from cataloged galaxies.