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Power Spectrum Analysis of Far-Infrared Sky Brightness in the Lockman Hole

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ISO Surveys of a Dusty Universe

Part of the book series: Lecture Notes in Physics ((LNP,volume 548))

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Abstract

We investigate the characteristics of far-infrared brightness fluctuations at 90 μm and 170 μm in the Lockman Hole which were surveyed with ISO, using power spectrum analysis over the spatial frequency range of 0.05... 1 arcmin-1. The power spectra are found to be rather flat at low spatial frequencies (f ≤ 0.1 arcmin-1), and tend to decrease slowly towards the higher frequencies. The latter—unlike the power-law ones—are seen in the IR cirrus fluctuations, and are well explained by randomly distributed point sources. We conclude that the fluctuations due to the IR cirrus are not dominant in the Lockman Hole and are most likely due to faint galaxies. We also give constraints on the galaxy number counts, which indicate the existence of strong evolution in the counts.

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Author information

Authors and Affiliations

  1. The Institute of Space and Astronautical Science, 3-1-1 Yoshinodai, 229-8510, Kanagawa, Sagamihara, Japan

    Hideo Matsuhara, Yasunori Sato, Haruyuki Okuda & Toshio Matsumoto

  2. Institute of Astronomy, The University of Tokyo, 2-21-1 Osawa, 181-8588, Tokyo, Mitaka, Japan

    Kimiaki Kawara & Yoshiaki Sofue

  3. Astronomical Institute, Tohoku University, 980-8578, Sendai, Aoba, Japan

    Yoshiaki Taniguchi

  4. Faculty of Engineering, Gifu University, 501-1193, Gifu, Japan

    Ken-ichi Wakamatsu

  5. Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, 96822, Honolulu, HI, USA

    Lennox L. Cowie, Robert D. Joseph & David B. Sanders

Authors
  1. Hideo Matsuhara
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  2. Kimiaki Kawara
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  3. Yasunori Sato
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  4. Yoshiaki Taniguchi
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  5. Haruyuki Okuda
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  6. Toshio Matsumoto
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  7. Yoshiaki Sofue
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  8. Ken-ichi Wakamatsu
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  9. Lennox L. Cowie
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  10. Robert D. Joseph
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  11. David B. Sanders
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Editor information

Editors and Affiliations

  1. Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany

    D. Lemke , M. Stickel  & K. Wilke ,  & 

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© 2000 Springer-Verlag Berlin Heidelberg

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Matsuhara, H. et al. (2000). Power Spectrum Analysis of Far-Infrared Sky Brightness in the Lockman Hole. In: Lemke, D., Stickel, M., Wilke, K. (eds) ISO Surveys of a Dusty Universe. Lecture Notes in Physics, vol 548. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-45553-1_14

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  • DOI: https://doi.org/10.1007/3-540-45553-1_14

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-67479-5

  • Online ISBN: 978-3-540-45553-0

  • eBook Packages: Springer Book Archive

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