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  1. Article ; Online: Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons.

    Zemcov, Michael / Immel, Poppy / Nguyen, Chi / Cooray, Asantha / Lisse, Carey M / Poppe, Andrew R

    Nature communications

    2017  Volume 8, Page(s) 15003

    Abstract: The cosmic optical background is an important observable that constrains energy production in stars and more exotic physical processes in the universe, and provides a crucial cosmological benchmark against which to judge theories of structure formation. ... ...

    Abstract The cosmic optical background is an important observable that constrains energy production in stars and more exotic physical processes in the universe, and provides a crucial cosmological benchmark against which to judge theories of structure formation. Measurement of the absolute brightness of this background is complicated by local foregrounds like the Earth's atmosphere and sunlight reflected from local interplanetary dust, and large discrepancies in the inferred brightness of the optical background have resulted. Observations from probes far from the Earth are not affected by these bright foregrounds. Here we analyse the data from the Long Range Reconnaissance Imager (LORRI) instrument on NASA's New Horizons mission acquired during cruise phase outside the orbit of Jupiter, and find a statistical upper limit on the optical background's brightness similar to the integrated light from galaxies. We conclude that a carefully performed survey with LORRI could yield uncertainties comparable to those from galaxy counting measurements.
    Language English
    Publishing date 2017-04-11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2041-1723
    ISSN (online) 2041-1723
    DOI 10.1038/ncomms15003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Measurement of the cosmic optical background using the long range reconnaissance imager on New Horizons

    Michael Zemcov / Poppy Immel / Chi Nguyen / Asantha Cooray / Carey M. Lisse / Andrew R. Poppe

    Nature Communications, Vol 8, Iss 1, Pp 1-

    2017  Volume 9

    Abstract: The cosmic optical background is an important cosmological observable. Here the authors show that a direct observation of the background brightness from the outer solar system can be obtained by the LORRI instrument aboard the New Horizons mission, on ... ...

    Abstract The cosmic optical background is an important cosmological observable. Here the authors show that a direct observation of the background brightness from the outer solar system can be obtained by the LORRI instrument aboard the New Horizons mission, on the basis of data acquired between Jupiter and Uranus.
    Keywords Science ; Q
    Language English
    Publishing date 2017-04-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article: On the origin of near-infrared extragalactic background light anisotropy

    Zemcov, Michael / Anson Lam / Asantha Cooray / Dae Hee Lee / Gael Roudier / James Bock / Joseph Smidt / Kohji Tsumura / Min Gyu Kim / Phillip Korngut / Shuji Matsuura / Takehiko Wada / Toshiaki Arai / Toshio Matsumoto / Uk Won Nam / Yan Gong

    Science. 2014 Nov. 7, v. 346, no. 6210

    2014  

    Abstract: ... have sought to measure this diffuse distribution of light: the extragalactic background light. Zemcov ...

    Abstract 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
    Keywords light ; photons
    Language English
    Dates of publication 2014-1107
    Size p. 732-735.
    Publishing place American Association for the Advancement of Science
    Document type Article
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.1258168
    Database NAL-Catalogue (AGRICOLA)

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  4. Article ; Online: On the origin of near-infrared extragalactic background light anisotropy.

    Zemcov, Michael / Smidt, Joseph / Arai, Toshiaki / Bock, James / Cooray, Asantha / Gong, Yan / Kim, Min Gyu / Korngut, Phillip / Lam, Anson / Lee, Dae Hee / Matsumoto, Toshio / Matsuura, Shuji / Nam, Uk Won / Roudier, Gael / Tsumura, Kohji / Wada, Takehiko

    Science (New York, N.Y.)

    2014  Volume 346, Issue 6210, Page(s) 732–735

    Abstract: 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 ... ...

    Abstract 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.
    Language English
    Publishing date 2014-11-07
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 128410-1
    ISSN 1095-9203 ; 0036-8075
    ISSN (online) 1095-9203
    ISSN 0036-8075
    DOI 10.1126/science.1258168
    Database MEDical Literature Analysis and Retrieval System OnLINE

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