Planck early results: Cluster Sunyaev-Zeldovich optical scaling relations
Abstract
We present the Sunyaev-Zeldovich (SZ) signal-to-richness scaling relation (Y500-N200) for the MaxBCG cluster catalogue. Employing a multi-frequency matched filter on the Planck sky maps, we measure the SZ signal for each cluster by adapting the filter according to weak-lensing calibrated mass-richness relations (N200-M500). We bin our individual measurements and detect the SZ signal down to the lowest richness systems (N200=10) with high significance, achieving a detection of the SZ signal in systems with mass as low as M500~5e13 Msolar. The observed Y500-N200 relation is well modeled by a power law over the full richness range. It has a lower normalisation at given N200 than predicted based on X-ray models and published mass-richness relations. An X-ray subsample, however, does conform to the predicted scaling, and model predictions do reproduce the relation between our measured bin-average SZ signal and measured bin-average X-ray luminosities. At fixed richness, we find an intrinsic dispersion in the Y500-N200 relation of 60% rising to of order 100% at low richness. Thanks to its all-sky coverage, Planck provides observations for more than 13,000 MaxBCG clusters and an unprecedented SZ/optical data set, extending the list of known cluster scaling laws to include SZ-optical properties. The data set offers essential clues for models of galaxy formation. Moreover, the lower normalisation of the SZ-mass relation implied by the observed SZ-richness scaling has important consequences for cluster physics and cosmological studies with SZ clusters.
Keywords
Cite
@article{arxiv.1101.2027,
title = {Planck early results: Cluster Sunyaev-Zeldovich optical scaling relations},
author = {Planck Collaboration and N. Aghanim and M. Arnaud and M. Ashdown and J. Aumont and C. Baccigalupi and A. Balbi and A. J. Banday and R. B. Barreiro and M. Bartelmann and J. G. Bartlett and E. Battaner and K. Benabed and A. Benoît and J. -P. Bernard and M. Bersanelli and R. Bhatia and J. J. Bock and A. Bonaldi and J. R. Bond and J. Borrill and F. R. Bouchet and M. L. Brown and M. Bucher and C. Burigana and P. Cabella and J. -F. Cardoso and A. Catalano and L. Cayón and A. Challinor and A. Chamballu and L. -Y Chiang and C. Chiang and G. Chon and P. R. Christensen and E. Churazov and D. L. Clements and S. Colafrancesco and S. Colombi and F. Couchot and A. Coulais and B. P. Crill and F. Cuttaia and A. Da Silva and H. Dahle and L. Danese and R. J. Davis and P. de Bernardis and G. de Gasperis and A. de Rosa and G. de Zotti and J. Delabrouille and J. -M. Delouis and F. -X. Désert and J. M. Diego and K. Dolag and S. Donzelli and O. Doré and U. Dörl and M. Douspis and X. Dupac and G. Efstathiou and T. A. Enßlin and F. Finelli and I. Flores and O. Forni and M. Frailis and E. Franceschi and S. Fromenteau and S. Galeotta and K. Ganga and R. T. Génova-Santos and M. Giard and G. Giardino and Y. Giraud-Héraud and J. González-Nuevo and K. M. Górski and S. Gratton and A. Gregorio and A. Gruppuso and D. Harrison and S. Henrot-Versillé and C. Hernández-Monteagudo and D. Herranz and S. R. Hildebrandt and E. Hivon and M. Hobson and W. A. Holmes and W. Hovest and R. J. Hoyland and K. M. Huffenberger and A. H. Jaffe and W. C. Jones and M. Juvela and E. Keihänen and R. Keskitalo and T. S. Kisner and R. Kneissl and L. Knox and H. Kurki-Suonio and G. Lagache and J. -M. Lamarre and A. Lasenby and R. J. Laureijs and C. R. Lawrence and S. Leach and R. Leonardi and M. Linden-Vørnle and M. López-Caniego and P. M. Lubin and J. F. Macías-Pérez and C. J. MacTavish and B. Maffei and D. Maino and N. Mandolesi and R. Mann and M. Maris and F. Marleau and E. Martínez-González and S. Masi and S. Matarrese and F. Matthai and P. Mazzotta and S. Mei and A. Melchiorri and J. -B. Melin and L. Mendes and A. Mennella and S. Mitra and M. -A. Miville-Deschênes and A. Moneti and L. Montier and G. Morgante and D. Mortlock and D. Munshi and A. Murphy and P. Naselsky and P. Natoli and C. B. Netterfield and H. U. Nørgaard-Nielsen and F. Noviello and D. Novikov and I. Novikov and I. J. O'Dwyer and S. Osborne and F. Pajot and F. Pasian and G. Patanchon and O. Perdereau and L. Perotto and F. Perrotta and F. Piacentini and M. Piat and E. Pierpaoli and R. Piffaretti and S. Plaszczynski and E. Pointecouteau and G. Polenta and N. Ponthieu and T. Poutanen and G. W. Pratt and G. Prézeau and S. Prunet and J. -L. Puget and R. Rebolo and M. Reinecke and C. Renault and S. Ricciardi and T. Riller and I. Ristorcelli and G. Rocha and C. Rosset and J. A. Rubiño-Martín and B. Rusholme and M. Sandri and G. Savini and B. M. Schaefer and D. Scott and M. D. Seiffert and P. Shellard and G. F. Smoot and J. -L. Starck and F. Stivoli and V. Stolyarov and R. Sudiwala and R. Sunyaev and J. -F. Sygnet and J. A. Tauber and L. Terenzi and L. Toffolatti and M. Tomasi and J. -P. Torre and M. Tristram and J. Tuovinen and L. Valenziano and L. Vibert and P. Vielva and F. Villa and N. Vittorio and B. D. Wandelt and S. D. M. White and M. White and D. Yvon and A. Zacchei and A. Zonca},
journal= {arXiv preprint arXiv:1101.2027},
year = {2016}
}
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