The XXL Survey. V. Detection of the Sunyaev-Zel'Dovich Effect of the Redshift 1.9 Galaxy Cluster XLSSU J021744.1-034536 With Carma

• Published in: The Astrophysical Journal
• Main Authors: Mantz, A. B., Abdulla, Z., Carlstrom, J. E., Greer, C. H., Leitch, E. M., Marrone, D. P., Muchovej, S., Adami, C., Birkinshaw, M., Bremer, M., Clerc, N., Giles, P., Horellou, Cathy, Maughan, B., Pacaud, F., Pierre, M., Willis, J.
• Language: unknown
• Published: 2014
• Subjects: Astronomy; Astrophysics and Cosmology; galaxies: clusters: individual (XLSSU J021744.1-034536); galaxies: clusters: intracluster medium; X-rays: galaxies: clusters; South Pole; South pole
• Online Access: https://doi.org/10.1088/0004-637x/794/2/157; https://research.chalmers.se/en/publication/205934

We report the detection of the Sunyaev-Zel'dovich (SZ) effect of galaxy cluster XLSSU J021744.1-034536, using 30 GHz Combined Array for Research in Millimeter-wave Astronomy (CARMA) data. This cluster was discovered via its extended X-ray emission in the XMM-Newton Large Scale Structure survey, the precursor to the XXL survey. It has a photometrically determined redshift z = 1.91(-0.21)(+0.19), making it among the most distant clusters known, and nominally the most distant for which the SZ effect has been measured. The spherically integrated Comptonization is Y-500 = (3.0 +/- 0.4) x 10(-12), a measurement that is relatively insensitive to assumptions regarding the size and redshift of the cluster, as well as the background cosmology. Using a variety of locally calibrated cluster scaling relations extrapolated to z similar to 2, we estimate a mass M-500 similar to (1-2) x 10(14) M-circle dot from the X-ray flux and SZ signal. The measured properties of this cluster are in good agreement with the extrapolation of an X-ray luminosity-SZ effect scaling relation calibrated from clusters discovered by the South Pole Telescope at higher masses and lower redshifts. The full XXL-CARMA sample will provide a more complete, multi-wavelength census of distant clusters in order to robustly extend the calibration of cluster scaling relations to these high redshifts.