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1997•arXiv (Cornell University)Open access

X-Ray Properties of three Clusters of Galaxies and their Implications for the Sunyaev-Zeldovich Effect

Michael Thierbach, R. Schlickeiser, R. Wielebinski

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Abstract

We present the preparation for an observation of the Sunyaev-Zeldovich (SZ) effect with the 100m telescope in Effelsberg. We calculate the expected diminution of the cosmic microwave background radiation (CMB) at radio wavelength towards a small sample of clusters of galaxies: A85, A665, and Cl0016+16. We obtain the required parameters from the X-ray analysis of ROSAT PSPC data of these clusters. We derive expected central diminutions ΔT_R,max of -(440\pm 180)μK for A665 and -(810\pm 680)μK for Cl0016+16. For the cluster A85 we find evidence for a cooling flow. The best candidate for a SZ measurement is the cluster 0016+16.

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We present the preparation for an observation of the Sunyaev-Zeldovich (SZ) effect with the 100m telescope in Effelsberg. We calculate the expected diminution of the cosmic microwave background radiation (CMB) at radio wavelength towards a small sample of clusters of galaxies: A85, A665, and Cl0016+16. We obtain the required parameters from the X-ray analysis of ROSAT PSPC data of these clusters. We derive expected central diminutions ΔT_R,max of -(440\pm 180)μK for A665 and -(810\pm 680)μK for Cl0016+16. For the cluster A85 we find evidence for a cooling flow. The best candidate for a SZ measurement is the cluster 0016+16.

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Available abstract

We present the preparation for an observation of the Sunyaev-Zeldovich (SZ) effect with the 100m telescope in Effelsberg. We calculate the expected diminution of the cosmic microwave background radiation (CMB) at radio wavelength towards a small sample of clusters of galaxies: A85, A665, and Cl0016+16. We obtain the required parameters from the X-ray analysis of ROSAT PSPC data of these clusters. We derive expected central diminutions ΔT_R,max of -(440\pm 180)μK for A665 and -(810\pm 680)μK for Cl0016+16. For the cluster A85 we find evidence for a cooling flow. The best candidate for a SZ measurement is the cluster 0016+16.

Key concepts: ROSAT, Cosmic microwave background, Physics, Astrophysics, Galaxy cluster, Cooling flow, Cluster (spacecraft), Galaxy

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X-Ray Properties of three Clusters of Galaxies and their Implications for the Sunyaev-Zeldovich Effect — Research Paper | ScholarLens