Diffuse Galactic light at high Galactic latitude: nature and interpretation

Details Diffuse Galactic light at high Galactic latitude: nature and interpretation Diffuse Galactic light at high Galactic latitude: nature and interpretation

2007-09-06

arxiv.org/abs/0709.0826v1

Mon.Not.Roy.Astron.Soc.370:1763,2006

Astronomy and Astrophysics

Astrophysics

9 pages, 5 figures

Scientific paper

10.1111/j.1365-2966.2006.10591.x

The hypothesis of an extended red emission (ERE) in diffuse Galactic light (DGL) has been put forward in 1998 by Gordon, Witt and Friedmann who found that scattered starlight was not enough to explain the amount of DGL in the R band, in some high Galactic latitude directions. This paper re-investigates, for high Galactic latitudes, the brightnesses and colours of DGL, integrated star and galaxy light (ISGL), and of the total extrasolar light (ISGL+DGL) measured by Pioneer. Under the traditional assumption that DGL is forward scattering of background starlight by interstellar dust on the line of sight, ISGL and Pioneer have very close colours, as it is found by Gordon, Witt and Friedmann. Pioneer observations at high |b| thus accept an alternative and simple interpretation, with no involvement of ERE in DGL.

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