On the origin of near-infrared extragalactic background light anisotropy
On the origin of near-infrared extragalactic background light anisotropy
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DOI：
10.1126/science.1258168
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发表时间：
2014-11
期刊：
影响因子：
56.9
通讯作者：
M. Zemcov;J. Smidt;T. Arai;J. Bock;A. Cooray;Y. Gong;Min Gyu Kim;P. Korngut;A. Lam;Dae-hee Lee;T. Matsumoto;S. Matsuura;U. Nam;G. Roudier;K. Tsumura;T. Wada
中科院分区：
文献类型：
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作者：
M. Zemcov;J. Smidt;T. Arai;J. Bock;A. Cooray;Y. Gong;Min Gyu Kim;P. Korngut;A. Lam;Dae-hee Lee;T. Matsumoto;S. Matsuura;U. Nam;G. Roudier;K. Tsumura;T. Wada
漫射宇宙辉光并不是原始的。任何恒星或星系发出的所有光子的累积图是宇宙演化的非常理想的历史记录。出于这个原因，宇宙学家试图测量这种光的漫射分布：河外背景光。泽姆科夫等人。发射了一枚火箭来测量这个微弱背景中的波动，并发现比已知星系单独产生的大规模波动更大（参见莫斯利的观点）。最有可能的罪魁祸首是从宿主星系中潮汐剥离的恒星，而不是未知的原始星系。科学，本期第 14 页。第732章另见 p. 696 追踪宇宙历史的发射波动与低红移的晕内恒星发出的光最为一致。 [另请参阅莫斯利的观点] 河外背景光 (EBL) 各向异性追踪宇宙历史上光子总产生的变化，并且可能包含星系点源勘测中遗漏的微弱、扩展的成分。红外 EBL 波动被归因于再电离 (EOR) 时期的原始星系和黑洞，或者来自低红移时从其母星系潮汐剥离的恒星的晕内光 (IHL)。我们报告了 1.1 和 1.6 微米专门探空火箭实验的新 EBL 各向异性测量结果。观测到的波动超过了已知星系群的幅度，与 EOR 星系和黑洞不一致，并且很大程度上可以通过 IHL 发射来解释。测量到的波动与 EBL 强度相关，该强度与通过计数测量的已知星系的背景相当，因此对宇宙中光子所包含的能量有很大贡献。
A diffuse cosmic glow is not primordial A cumulative map of all photons ever emitted by any star or galaxy is a highly desirable historical record of the universe's evolution. For this reason, cosmologists have sought to measure this diffuse distribution of light: the extragalactic background light. Zemcov et al. sent up a rocket to measure the fluctuations in this faint background and found largescale fluctuations greater than known galaxies alone should produce (see the Perspective by Moseley). Stars tidally stripped from their host galaxies are the most likely culprit, rather than unknown primordial galaxies. Science, this issue p. 732; see also p. 696 Emission fluctuations that trace the cosmic history are most consistent with the light from intrahalo stars at low redshift. [Also see Perspective by Moseley] Extragalactic background light (EBL) anisotropy traces variations in the total production of photons over cosmic history and may contain faint, extended components missed in galaxy point-source surveys. Infrared EBL fluctuations have been attributed to primordial galaxies and black holes at the epoch of reionization (EOR) or, alternately, intrahalo light (IHL) from stars tidally stripped from their parent galaxies at low redshift. We report new EBL anisotropy measurements from a specialized sounding rocket experiment at 1.1 and 1.6 micrometers. The observed fluctuations exceed the amplitude from known galaxy populations, are inconsistent with EOR galaxies and black holes, and are largely explained by IHL emission. The measured fluctuations are associated with an EBL intensity that is comparable to the background from known galaxies measured through number counts and therefore a substantial contribution to the energy contained in photons in the cosmos.