The Astrophysical Journal, 516:L49L52, 1999 May 10
1999. The American Astronomical Society. All rights reserved. Printed in U.S.A.
DIFFUSE BACKGROUND RADIATION
Richard C. Henry
Center for Astrophysical Sciences, Henry A. Rowland Department of Physics and Astronomy,
Johns Hopkins University, Baltimore, MD 21218-2686; firstname.lastname@example.org
Received 1999 January 21; accepted 1999 March 8; published 1999 March 25
A new determination of the upper limit to the cosmic diffuse background radiation, at 110 nm, of 300 photons
is placed in the context of diffuse background measurements across the entire electromagnetic
spectrum, including new optical, infrared, visible, and gamma-ray background measurements. The possibility that
observed excess diffuse visible radiation is due to redshifted cosmological Lya recombination radiation is explored.
Also, a new standard of units for the display of spectra is advocated.
Subject headings: cosmology: observations -- diffuse radiation -- methods: data analysis