NTRS - NASA Technical Reports Server

Back to Results
Simulated cosmic microwave background maps at 0.5 deg resolution: Unresolved featuresHigh-contrast peaks in the cosmic microwave background (CMB) anisotropy can appear as unresolved sources to observers. We fit simluated CMB maps generated with a cold dark matter model to a set of unresolved features at instrumental resolution 0.5 deg-1.5 deg to derive the integral number density per steradian n (greater than absolute value of T) of features brighter than threshold temperature absolute value of T and compare the results to recent experiments. A typical medium-scale experiment observing 0.001 sr at 0.5 deg resolution would expect to observe one feature brighter than 85 micro-K after convolution with the beam profile, with less than 5% probability to observe a source brighter than 150 micro-K. Increasing the power-law index of primordial density perturbations n from 1 to 1.5 raises these temperature limits absolute value of T by a factor of 2. The MSAM features are in agreement with standard cold dark matter models and are not necessarily evidence for processes beyond the standard model.
Document ID
Document Type
Reprint (Version printed in journal)
External Source(s)
Kogut, A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hinshaw, G. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Bennett, C. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1995
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 441
Issue: 1
ISSN: 0004-637X
Subject Category
Distribution Limits