DIRBE Minus 2MASS: Confirming the CIRB in 40 New Regions at 2.2 and 3.5 μm

With the release of the 2MASS All-Sky Point Source Catalog, stellar fluxes from 2MASS are used to remove the contribution due to Galactic stars from the intensity measured by DIRBE in 40 new regions in the North and South Galactic polar caps. After subtracting the interplanetary and Galactic foregro...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2007-09, Vol.666 (1), p.34-44
Main Authors: Levenson, L. R, Wright, E. L, Johnson, B. D
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:With the release of the 2MASS All-Sky Point Source Catalog, stellar fluxes from 2MASS are used to remove the contribution due to Galactic stars from the intensity measured by DIRBE in 40 new regions in the North and South Galactic polar caps. After subtracting the interplanetary and Galactic foregrounds, a consistent residual intensity of 14.69 plus or minus 4.49 kJy sr super(-1) at 2.2 mu m is found. Allowing for a constant calibration factor between the DIRBE 3.5 mu m and the 2MASS 2.2 mu m fluxes, a similar analysis leaves a residual intensity of 15.62 plus or minus 3.34 kJy sr super(-1) at 3.5 mu m. The intercepts of the DIRBE minus 2MASS correlation at 1.25 mu m show more scatter and are a smaller fraction of the foreground, leading to a still weak limit on the CIRB of 8.88 plus or minus 6.28 kJy sr super(-1) (1 sigma ).
ISSN:0004-637X
1538-4357
DOI:10.1086/520112