A Tentative Detection of the Cosmic Infrared Background at 3.5 microns from COBE/DIRBE Observations

Details A Tentative Detection of the Cosmic Infrared Background at 3.5 microns from COBE/DIRBE Observations A Tentative Detection of the Cosmic Infrared Background at 3.5 microns from COBE/DIRBE Observations

1998-09-18

arxiv.org/abs/astro-ph/9809239v1

Astrophys.J.508:L9-L12,1998

Astronomy and Astrophysics

Astrophysics

8 pages, AASTeX, 2 embedded EPS figures. Accepted for publication in ApJ Letters

Scientific paper

10.1086/311714

Foreground emission and scattered light from interplanetary dust (IPD) particles and emission from Galactic stellar sources are the greatest obstacles for determining the cosmic infrared background (CIB) from diffuse sky measurements in the ~ 1 to 5 micron range. We use ground-based observational limits on the K-band intensity of the CIB in conjunction with skymaps obtained by the Diffuse Infrared Background Experiment (DIRBE) on the COBE satellite to reexamine the limits on the CIB at 1.25, 3.5, and 4.9 microns. Adopting a CIB intensity of 7.4 nW m-2 sr-1 at 2.2 microns, and using the 2.2 micron DIRBE skymap from which the emission from IPD cloud has been subtracted, we create a spatial template of the Galactic stellar contribution to the diffuse infrared sky. This template is then used to subtract the contribution of the diffuse Galactic stellar emission from the IPD-emission-subtracted DIRBE skymaps. The DIRBE 100 micron data are used to estimate the small contribution of emission from interstellar dust at 3.5 and 4.9 microns. Our method significantly reduces the errors associated with the subtraction of Galactic starlight, leaving only the IPD emission component as the primary obstacle for the detection of the CIB at these wavelengths. This analysis leads to a tentative detection of the CIB at 3.5 microns. The cosmological implications of these results are discussed in the paper.

Affiliated with

Also associated with

No associations

Rating

A Tentative Detection of the Cosmic Infrared Background at 3.5 microns from COBE/DIRBE Observations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Tentative Detection of the Cosmic Infrared Background at 3.5 microns from COBE/DIRBE Observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Tentative Detection of the Cosmic Infrared Background at 3.5 microns from COBE/DIRBE Observations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-458130