High-Significance Sunyaev-Zel'dovich Measurement: Abell 1914 Seen With the Arcminute Microkelvin Imager

Barker, Robert ; Biddulph, Phillip ; Bly, Dennis ; Boysen, Roger ; Brown, Anthony ; Clementson, Christopher ; Crofts, Michael ; Culverhouse, Thomas ; Czeres, Jaroslaw ; Dace, Roger ; D' ; Alessandro, Robert ; Doherty, Peter ; Duffett-Smith, Peter ; Duggan, Kenneth ; Ely, John ; Felvus, Mike ; Flynn, William ; Geisbuesch, Jorn ; Grainge, Keith ; Grainger, William ; Hammet, David

Stanford Linear Accelerator Center

关键词: Telescopes Astrophysics,Astro;    Flux Density;    Sensitivity;    Detection;    71 Classical And Quantum Mechanics, General Physics;   

DOI  :  10.2172/878418
RP-ID  :  SLAC-PUB-11480
RP-ID  :  AC02-76SF00515
RP-ID  :  878418

美国|英语

来源: UNT Digital Library

【 摘 要 】

We report the first detection of a Sunyaev-Zel'dovich (S-Z) decrement with the Arcminute Microkelvin Imager (AMI). We have made commissioning observations towards the cluster A1914 and have measured an integrated flux density of -8.61 mJy in a uv-tapered map with noise level 0.19 mJy/beam. We find that the spectrum of the decrement, measured in the six channels between 13.5-18 GHz, is consistent with that expected for a S-Z effect. The sensitivity of the telescope is consistent with the figures used in our simulations of cluster surveys with AMI.