Ionized gas in X-ray clusters of galaxies - Radio limits

Abstract

view Abstract Citations (35) References (41) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ionized gas in X-ray clusters of galaxies: radio limits. Rudnick, L. Abstract Radio observations at 2 cm with the 42-m NRAO telescope at Green Bank were made of four X-ray clusters of galaxies (A401, A1656, A2199, and A2319) and one unconfirmed, possible X-ray cluster (A2255). Limits are set on the diminution of the microwave background due to inverse Compton scattering by hot gas in the clusters and are typically on the order of 1 mK at the 90% confidence level. For the Coma cluster (A1656), these limits are consistent with the various model predictions summarized by Bahcall and Sarazin (1977) but are inconsistent with the results of Gull and Northover (1976). Other contributions to the sky brightness at centimeter wavelengths are roughly estimated, and may prove a fundamental limit for future observations. Limits are derived for small-scale anisotropies in the microwave background, and confirm previous work at a 90% confidence level. Publication: The Astrophysical Journal Pub Date: July 1978 DOI: 10.1086/156233 Bibcode: 1978ApJ...223...37R Keywords: Galactic Clusters; Interstellar Gas; Ionized Gases; Radio Astronomy; X Ray Sources; Anisotropic Media; Background Radiation; High Temperature Gases; Microwave Emission; Sky Brightness; Astronomy; Clusters of Galaxies:Gas; X-Ray Clusters: Radio Observations full text sources ADS |