A Detection of Bright Features in the Microwave Background

Details A Detection of Bright Features in the Microwave Background A Detection of Bright Features in the Microwave Background

1996-04-25

arxiv.org/abs/astro-ph/9604155v1

Astronomy and Astrophysics

Astrophysics

17 pages, LaTeX+aasms4 package, 2 included PostScript figures. Submitted to Ap.J Letters

Scientific paper

10.1086/304109

We report the characterization of bright, compact features in the cosmic microwave background radiation (CMBR) detected during the June 1992 and June 1994 balloon flights of the Medium Scale Anisotropy Measurement (MSAM1-92 and MSAM1-94, respectively). Spectral flux densities are determined for each feature at 5.7, 9.3, and 16.5 cm$^{-1}$. No viable counterparts for these features were found in source catalogs at 5 GHz or at 100 $\mu$m. The measured spectrum of each feature is consistent with a temperature fluctuation in the CMBR. The existence of these features is consistent with adiabatic fluctuation models of anisotropy in the CMBR.

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