Small-scale structures in the far-infrared background

Uwe Herbstmeier, Péter Ábrahám, Dietrich Lemke, R. J. Laureijs, Ulrich Klaas, Kalevi Mattila, Christoph Leinert, Christian Surace, Michael Kunkel

Research output: Contribution to journalArticle

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Abstract

Four fields with areas ranging from 80 to 2000 arcmin2 have been mapped with the photometer on board of the Infrared Space Observatory (ISO) at 90 and around 180 μm in regions of bright and faint cirrus. We examined the spatial characteristics of the infrared background emission with high spatial resolution and found that the fluctuations in the background emission limit the detection sensitivity of ISOPHOT for most of our observations. At 90 μm the power law relation between the power in the fluctuations and the spatial frequencies established from IRAS data could be extended to twice as high spatial frequencies. At 180 μm the small-scale fluctuations were studied for the first time by a cold space telescope with arcminute-resolution. A similar power law and spectral index down to spatial scales of 3′ as for the 90 μm component is found. For cirrus clouds the spatial frequency spectrum in the far-infrared has a similar shape as that derived from 21 cm line observations of the interstellar neutral hydrogen. In faint regions the fluctuations are caused presumably by randomly distributed extragalactic sources. Future 3 m class space telescopes surveying the sky around 200 μm will not be hampered by cirrus over most of the sphere.

Original languageEnglish
Pages (from-to)739-747
Number of pages9
JournalAstronomy and Astrophysics
Volume332
Issue number2
Publication statusPublished - Apr 10 1998

Fingerprint

cirrus
power law
photometer
telescopes
cirrus clouds
Infrared Space Observatory (ISO)
surveying
spatial resolution
Infrared Astronomy Satellite
observatory
hydrogen
photometers
sky
high resolution

Keywords

  • Diffuse radiation
  • Infrared: ISM: continuum
  • ISM: structure
  • Methods: observational

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Herbstmeier, U., Ábrahám, P., Lemke, D., Laureijs, R. J., Klaas, U., Mattila, K., ... Kunkel, M. (1998). Small-scale structures in the far-infrared background. Astronomy and Astrophysics, 332(2), 739-747.

Small-scale structures in the far-infrared background. / Herbstmeier, Uwe; Ábrahám, Péter; Lemke, Dietrich; Laureijs, R. J.; Klaas, Ulrich; Mattila, Kalevi; Leinert, Christoph; Surace, Christian; Kunkel, Michael.

In: Astronomy and Astrophysics, Vol. 332, No. 2, 10.04.1998, p. 739-747.

Research output: Contribution to journalArticle

Herbstmeier, U, Ábrahám, P, Lemke, D, Laureijs, RJ, Klaas, U, Mattila, K, Leinert, C, Surace, C & Kunkel, M 1998, 'Small-scale structures in the far-infrared background', Astronomy and Astrophysics, vol. 332, no. 2, pp. 739-747.
Herbstmeier U, Ábrahám P, Lemke D, Laureijs RJ, Klaas U, Mattila K et al. Small-scale structures in the far-infrared background. Astronomy and Astrophysics. 1998 Apr 10;332(2):739-747.
Herbstmeier, Uwe ; Ábrahám, Péter ; Lemke, Dietrich ; Laureijs, R. J. ; Klaas, Ulrich ; Mattila, Kalevi ; Leinert, Christoph ; Surace, Christian ; Kunkel, Michael. / Small-scale structures in the far-infrared background. In: Astronomy and Astrophysics. 1998 ; Vol. 332, No. 2. pp. 739-747.
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