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천문우주과학 연구동향

천문우주과학과 관련된 국내외 상위 학술논문 및 특허 정보를 제공해 드립니다.

근적외선 영역 외부은하 배경복사의 비등방성 기원

On the origin of near-infrared extragalactic background light anisotropy
  • 작성자 : KASI
  • 작성일 : 2014-11-10
  • 조회수 : 3862
  • 저자Michael Zemcov, Joseph Smidt, Toshiaki Arai, et al.
  • Absract

     

    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.


  • 게재정보SCIENCE(2014.11.7)에 게재된 논문임
  • 첨부파일
  • 원 문http://www.sciencemag.org/content/346/6210/732
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