Detection of the Sunyaev / Zeldovich Effect in ABELL:773

Details Detection of the Sunyaev / Zeldovich Effect in ABELL:773 Detection of the Sunyaev / Zeldovich Effect in ABELL:773

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.265l..57g&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 265, NO. 4/DEC15, P. L57, 1993

Astronomy and Astrophysics

Astronomy

41

Scientific paper

We have observed the cluster Abell 773 with the Ryle Telescope at 15 GHz, and have measured a decrement in the cosmic microwave background radiation (CMB) of -590 +/- 116 microJy beam, due to the Sunyaev- Zel'dovich (S-Z) effect. On reasonable assumptions about the structure of the cluster atmosphere, this implies a central temperature decrement of between -790 and -990 microK. Together with the previous detection in A2218, which is significantly different from A773 as regards radiosource confusion, this result confirms the power of the method used, and emphasizes the advantages of interferometric methods over switched-beam telescopes for imaging structure in the CMB.

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