Structure in the COBE differential microwave radiometer first-year maps

  title={Structure in the COBE differential microwave radiometer first-year maps},
  author={George F. Smoot and Charles L. Bennett and Alan Kogut and Edward L. Wright and J. Aymon and Nancy W. Boggess and Edward S. Cheng and Giovanni De Amici and Samuel Gulkis and Michael G. Hauser and Gary F. Hinshaw and Peter Douglas Jackson and Michael A. Janssen and Ed Kaita and Thomas Kelsall and Phillip B. Keegstra and C. Lineweaver and Kurt L{\"o}wenstein and Philip Lubin and John C. Mather and Stephan S. Meyer and Samuel H. Moseley and Thomas Lee Murdock and Laurie Ann Rokke and Robert F. Silverberg and L. Tenorio and Rainer Weiss and David Todd Wilkinson},
  journal={The Astrophysical Journal},
Results of the first year of data from the differential microwave radiometers on the Cosmic Background Explorer are presented. Statistically significant structure that is well described as scale-invariant fluctuations with a Gaussian distribution is shown. The rms sky variation, smoothed to a total 10-deg FWHM Gaussian, is 30 +/-5 micro-K for Galactic latitude greater than 20-deg data with the dipole anisotropy removed. The rms cosmic quadrupole amplitude is 13 +/-4 micro-K. The angular… 

New Results on CMB Structure From the Tenerife Experiments

Temperature fluctuations in the CMB (Cosmic Microwave Background) are a key prediction of cosmological models of structure formation in the early Universe. Observations at the Teide Observatory,

Design and results of differential microwave radiometers on COBE

The Differential Microwave Radiometer (DMR) experiment on the Cosmic Background Explorer is in the final year of a scheduled four years of operation to measure large- and intermediate-scale

Root Mean Square Anisotropy in the COBE DMR Four-Year Sky Maps

The sky rms is the simplest model-independent characterization of a cosmological anisotropy signal. We show that the rms temperature fluctuations determined from the COBE Differential Microwave

Four-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results

In this Letter we present a summary of the spatial properties of the cosmic microwave background radiation based on the full 4 yr of COBE Differential Microwave Radiometer (DMR) observations, with

Band Power Spectra in the COBE DMR Four-Year Anisotropy Maps

We employ a pixel-based likelihood technique to estimate the angular power spectrum of the COBE Differential Microwave Radiometer (DMR) 4 yr sky maps. The spectrum is consistent with a

Recent Results from Cobe

The Cosmic Background Explorer or COBE 1, NASA’s first space mission devoted primarily to cosmology, carries three scientific instruments to make precise measurements of the spectrum and anisotropy

Foregrounds Removal and CMB Fluctuations in a Multiband Anisotropy Experiment: ARGO 1993

We present the results of a diffuse radiation survey carried out at millimeter and submillimeter wavelengths in the Aries and Taurus sky regions. A balloon-borne telescope with 0.°86 FWHM resolution


This paper presents the first results obtained with the Jodrell Bank–IAC two-element 33-GHz interferometer. The instrument was designed to measure the level of the cosmic microwave background (CMB)

Anisotropy in the Cosmic Microwave Background at Degree Angular Scales: Python V Results

Observations of the microwave sky using the Python telescope in its fifth season of operation at the Amundsen-Scott South Pole Station in Antarctica are presented. The system consists of a 0.75 m

COBE DMR observations of the early Universe

The Cosmic Background Explorer (COBE) satellite Differential Microwave Radiometer (DMR) instrument has recently reported the observations of very large scale structure in the microwave sky. The