X-ray observations of Abell 2218 and implications for the sunyaev-zel'dovich effect

Journal Article · Tue Jun 15 04:00:00 EDT 1982 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160005· OSTI ID:6939924

Boynton, P E; Radford, S J.E.; Schommer, R A; Murray, S S

The Einstein Observatory has been used to obtain a high-resolution X-ray image and an X-ray flux measurement of the galaxy cluster Abell 2218. Aside from a minor contribution from the cD galaxy near the cluster center, the image is circularly symmetric and displays a smooth radial profile. The combined system of intracluster medium and galaxies was modeled as a gas in hydrostatic equilibrium in a common gravitational potential with an isothermal galaxy component. This model was then fitted in the least-squares sense to the X-ray surface brightness distribution and to the optically determined galaxy surface density profile to determine model parameters. In this context, the gas was found to be nominally isothermal, moderately dense, and very hot (10 keV

• Research Organization: University of Washington, Seattle
• OSTI ID: 6939924
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 257:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640103* -- Astrophysics & Cosmology-- Quasi-Stellar
Radio
& X-Ray Sources-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BACKGROUND RADIATION
COSMIC GASES
COSMIC RADIATION
COSMIC RAY SOURCES
COSMIC X-RAY SOURCES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
EMISSION
FLUIDS
FUNCTIONS
GALAXY CLUSTERS
GASES
INTERGALACTIC SPACE
IONIZING RADIATIONS
MATHEMATICS
NUMERICAL ANALYSIS
RADIATIONS
SPACE
SPATIAL DISTRIBUTION
SPECTRA
SPECTRAL FUNCTIONS
X RADIATION
X-RAY SPECTRA