X-Ray Spectral Properties of the Cluster Abell 2029

Abstract

We have analyzed ASCA and ROSAT PSPC spectra and images of the galaxy cluster Abell 2029. The ASCA spectra of the cluster indicate that the gas temperature declines with radius. The PSPC image shows that the cluster is very regular and smooth. Also, there is no significant evidence for any irregularities in the temperature distribution in the cluster, as would be produced by a subcluster merger. These results suggest that A2029 is a relaxed cluster, and that the gas is in hydrostatic equilibrium. We use the assumption of equilibrium to determine the gravitational mass of the cluster as a function of radius. At a radius of 16' (1.92 h_50^-1 Mpc), the gravitational mass is M_tot = (9.42+-4.22) x 10^14 h_50^-1 Msun, while the mass of gas is M_gas = (2.52+-0.77) x 10^14 h_50^-5/2 Msun. The gas fraction is found to increase with radius; within a spherical radius of 16', the fraction is (M_gas/M_tot) = (0.26+-0.14) h_50^-3/2. The iron abundance in the gas is found to be (0.40+-0.04) of solar. There is no significant evidence for any variation in the abundance with position in the cluster. The global X-ray spectra, central X-ray spectra, and ROSAT surface brightness all require a cooling flow at the cluster center. The global X-ray spectrum implies that the total cooling rate is 363^+79_-96 h_50^-2 Msun/yr. The global X-ray spectra are consistent with the Galactic value for the soft X-ray absorption toward the cluster. The PSPC spectra of the central regions of the cluster are inconsistent with the large value of foreground excess absorption found by White et al. (1991) based on the Einstein SSS spectrum. The upper limit on excess foreground absorption is 7.3 x 10^19 cm^-2. However, the spectra do not rule a significant amount of intrinsic absorbing gas located within the cooling flow region.

ApJ, in press, 16 pages including 13 figures, formatted with emulateapj Latex style

References in corpus (3)

• The spatial distributions of cooling gas and intrinsic X-ray absorbing material in cooling flows
• Dark Matter and Baryon Fraction at the Virial Radius in Abell 2256
• A High Resolution ROSAT X-Ray Study of Abell 4059

Cited by in corpus (30)

• The Temperature Structure of 30 Nearby Clusters Observed with ASCA. Similarity of Temperature Profiles
• Metallicity Gradients in X-ray Clusters of Galaxies
• ROSAT PSPC observations of 36 high-luminosity clusters of galaxies: constraints on the gas fraction
• Observational Tests of the Mass-Temperature Relation for Galaxy Clusters
• An ASCA Study of the Heavy Element Distribution in Clusters of Galaxies
• The Complex Cooling Core of Abell 2029: Radio and X-ray Interactions
• Mass Profiles of the Typical Relaxed Galaxy Clusters A2199 and A496
• A search for diffuse radio emission in the relaxed, cool-core galaxy clusters A1068, A1413, A1650, A1835, A2029, and Ophiuchus
• Galaxy Clusters in the Swift/BAT era: Hard X-rays in the ICM
• Radial Temperature Profiles of X-Ray--Emitting Gas Within Clusters of Galaxies
• X-ray observations of the galaxy cluster Abell 2029 to the virial radius
• Radial Temperature Profiles of 11 Clusters of Galaxies Observed With BeppoSAX
• Non-thermal hard X-ray emission in galaxy clusters observed with the BeppoSAX PDS
• Chandra Observations of Abell 2029: No Cooling Flow and a Steep Abundance Gradient
• Detection of the Entropy of the Intergalactic Medium: Accretion Shocks in Clusters, Adiabatic Cores in Groups
• Iron Abundance Profiles of 12 Clusters of Galaxies Observed With BeppoSAX
• X-ray total mass estimate for the nearby relaxed cluster A3571
• Distribution of dark and baryonic matter in clusters of galaxies
• XMM-Newton observations of two X-ray bright galaxy groups - pushing out to r_500
• The Massively Accreting Cluster A2029
• Oxygen Absorption in Cooling Flows
• Entropy Flattening, Gas Clumping and Turbulence in Galaxy Clusters
• Significant Molecular Gas Deficiencies in Star-forming Cluster Galaxies at $z\sim 1.4$
• FUSE search for 10^5-10^6 K gas in the rich clusters of galaxies Abell 2029 and Abell 3112
• ROSAT Evidence for Intrinsic Oxygen Absorption in Cooling Flow Galaxies and Groups
• X-ray Absorption Toward Abell 2029 due to a Foreground Spiral
• Impact of thermal diffusion and other abundance anomalies on cosmological uses of galaxy clusters
• Deconvolution of ASCA X-ray data: I. Spectral-imaging method
• On the Internal Absorption of Galaxy Clusters
• ASCA and XMM-Newton Observations of A2029