2003/06/03 by E. L. Wright · 49 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Astrophysics and Star Formation Studies #Cosmic dust #Cosmic infrared background #Cosmic microwave background #Far infrared #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hydrogen line #Infrared #Interplanetary dust cloud #Optics #Physics #Solar System #Zodiacal light #astro-ph
paper · pdf · doi:10.1016/j.newar.2003.12.054
published in New Astronomy Reviews 48(5-6), 465-468 (Elsevier BV) · Invited paper presented at the 2nd VERITAS Symposium on TeV Astrophysics of Extragalactic Sources, April 24-26, 2003 at the Adler Planetarium in Chicago. 8 pages LaTeX with 3 embedded figures
arxiv created 2003/06/03 · openalex publication_date 2004/02/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The Diffuse InfraRed Background Experiment on COBE measured the total infrared signal seen from space at a distance of 1 astronomical unit from the Sun. Using time variations as the Earth orbits the Sun, it is possible to remove most of the foreground signal produced by the interplanetary dust cloud [zodiacal light]. By correlating the DIRBE signal with the column density of atomic hydrogen measured using the 21 cm line, it is possible to remove most of the foreground signal produced by interstellar dust, although one must still be concerned by dust associated with H2 (molecular gas) and H II (the warm ionized medium). DIRBE was not able to determine the CIRB in the 5-60 micron wavelength range, but did detect both a far infrared background and a near infrared background. The far infrared background has an integrated intensity of about 34 nW/m2/sr, while the near infrared and optical extragalactic background has about 59 nW/m2/sr. The Far InfraRed Absolute Spectrophotometer (FIRAS) on COBE has been used to constrain the long wavelength tail of the far infrared background but a wide range of intensities at 850 microns are compatible with the FIRAS data. Thus the fraction of the CIRB produced by SCUBA sources has large uncertainties in both the numerator and the denominator.