Speaker
Description
Clusters of galaxies, formed at the latest stages of structure formation, are unique cosmological probes to study the formation and evolution of large-scale structures. With the advent of large CMB surveys like those from the Planck satellite, the ACT and SPT telescopes, we now have access to large catalogs of galaxy clusters detected at millimeter wavelength via the thermal Sunyaev-Zeldovich (tSZ) effect. Nevertheless, it is interesting to complement them with high angular resolution (tens of arcseconds) observations to target the lowest mass and highest redshift clusters. This is the case of observations with the NIKA2 camera, which is installed on the IRAM 30–m telescope in Pico Veleta, Spain. Combining a 6.5 arcmin diameter field of view and sub-arcminute (17.6'' at 150 GHz) angular resolution, NIKA2 is capable of resolving the SZ effect towards clusters up to high redshifts.
In this talk, I will highlight NIKA2’s capabilities in unveiling low-mass, high redshift clusters. I will focus on the blind detection of galaxy clusters in the COSMOS field using the NIKA2 Cosmological Legacy Survey (N2CLS) Large Program observations. I will describe the candidate cluster sample we have obtained, and discuss its properties.
I will demonstrate that NIKA2 and the IRAM 30–m telescope are sensitive to the lowest mass clusters at intermediate and high redshift.
| Would you be interested in presenting a poster if the conference is oversubcribed? | Yes |
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