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, C., Maughan, B., Pacaud, F., Pierre, M., Willis, J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2014
• Subjects: galaxies: clusters: individual (XLSSU J021744.1-034536); galaxies: clusters: intracluster medium; X-rays: galaxies: clusters; South pole
• Online Access: https://hdl.handle.net/1983/0e899a34-6827-48e7-a295-b47bffaf46ba; https://research-information.bris.ac.uk/en/publications/0e899a34-6827-48e7-a295-b47bffaf46ba; https://doi.org/10.1088/0004-637X/794/2/157; https://research-information.bris.ac.uk/ws/files/34457881/1401.2087v2; http://arxiv.org/abs/1401.2087

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 , 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) × 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 2, we estimate a mass M 500 (1-2) × 10 14 M 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.