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The structure of high-redshift clusters from NIKA Sunyaev-Zel'dovich observations

Abstract : Recent Sunyaev-Zel'dovich (SZ) observations (e.g. Planck, ACT, SPT) have proved to be competitive and complementary to traditional observations of galaxy clusters for cosmology. Nevertheless, these surveys are limited by angular resolution and systematic effects due to the complex physics occurring in the intra-cluster medium (ICM). In order to better address the physics at play, dedicated follow-ups with much higher angular resolution are therefore necessary.With its dual-band capabilities at 150 and 250 GHz, and an angular resolution of 18 and 12 arcsec, the NIKA camera is an ideal instrument for such observations. It is based on newly developed Kinetic Inductance Detectors (KIDs) and operates at the IRAM 30-m telescope (Pico Veleta, Spain). NIKA is the prototype of the larger future camera NIKA2, it has been used to map the ICM of a representative set of clusters at z>0.45, as part of a pilot study for future NIKA2 large programs. After briefly introducing the specificities of NIKA, I will present the status of SZ observations performed at the IRAM 30-m telescope, including the most recent results.
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Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, March 17, 2015 - 1:16:01 PM
Last modification on : Thursday, November 19, 2020 - 12:59:05 PM


  • HAL Id : in2p3-01132494, version 1




R. Adam. The structure of high-redshift clusters from NIKA Sunyaev-Zel'dovich observations. Snowcluster 2015 – The Physics of Galaxy Cluster, Mar 2015, Snowbird, United States. ⟨in2p3-01132494⟩



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