MaxBCG: A red-sequence galaxy cluster finder
dc.contributor.author | Koester, Benjamin P. | en_US |
dc.contributor.author | McKay, Timothy A. | en_US |
dc.contributor.author | Annis, James | en_US |
dc.contributor.author | Wechsler, Risa H. | en_US |
dc.contributor.author | Evrard, August E. | en_US |
dc.contributor.author | Rozo, E. | en_US |
dc.contributor.author | Bleem, L. | en_US |
dc.contributor.author | Sheldon, E. S. | en_US |
dc.contributor.author | Johnston, D. | en_US |
dc.date.accessioned | 2008-08-14T19:11:43Z | |
dc.date.available | 2008-08-14T19:11:43Z | |
dc.date.issued | 2007-05-01 | en_US |
dc.identifier.citation | Koester, BP; Mckay, TA; Annis, J; Wechsler, RH; Evrard, AE; Rozo, E; Bleem, L; Sheldon, ES; Johnston, D. (2007). Astrophysical Journal, 660:(1, Part1) 221-238. <http://hdl.handle.net/2027.42/60602> | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://arxiv.org/abs/astro-ph/0701268 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/60602 | |
dc.description.abstract | Measurements of galaxy cluster abundances, clustering properties, and mass-to-light ratios in current and future surveys can provide important cosmological constraints. Digital wide-field imaging surveys, the recently demonstrated fidelity of red-sequence cluster detection techniques, and a new generation of realistic mock galaxy surveys provide the means for construction of large, cosmologically interesting cluster samples, whose selection and properties can be understood in unprecedented depth. Here we present the details of the maxBCG'' algorithm, a cluster detection technique tailored to multiband CCD imaging data. MaxBCG primarily relies on an observational cornerstone of massive galaxy clusters: they are marked by an overdensity of bright, uniformly red galaxies. This detection scheme also exploits classical brightest cluster galaxies (BCGs), which are often found at the centers of these same massive clusters. We study the algorithm through its performance on large, realistic, mock galaxy catalogs, which reveal that it is over 90% pure for clusters at 0.1 < z < 0.3 with 10 or more red galaxies, and over 90% complete for halos at 0.1 < z < 0.3 with masses above 2 x 10(14) h(-1) M-circle dot. MaxBCG is able to approximately recover the underlying halo abundance function and assign cluster richnesses strongly coupled to the underlying halo properties. The same tests indicate that maxBCG rarely fragments halos, occasionally overmerges line-of-sight neighboring (similar or equal to 10 h(-1) Mpc) halos, and overestimates the intrinsic halo red-sequence galaxy population by no more than 20%. The study concludes with a discussion of considerations for cosmological measurements with such catalogs, including modeling the selection function, the role of photometric errors, the possible cosmological dependence of richness measurements, and fair cluster selection across broad redshift ranges employing multiple bandpasses. | en_US |
dc.format.extent | 944828 bytes | |
dc.format.extent | 18 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Univ Chicago Press | en_US |
dc.title | MaxBCG: A red-sequence galaxy cluster finder | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Univ Michigan, Dept Phys, Ann Arbor, MI 48104 USA | en_US |
dc.contributor.affiliationother | NASA, Fermilab Astrophys Ctr, Fermi Natl Accelerator Lab, Batavia, IL 60510 USA | en_US |
dc.contributor.affiliationother | Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA | en_US |
dc.contributor.affiliationother | Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA | en_US |
dc.contributor.affiliationother | Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA | en_US |
dc.contributor.affiliationother | Univ Chicago, Dept Phys, Chicago, IL 60637 USA | en_US |
dc.contributor.affiliationother | NYU, Ctr Cosmol & Particle Phys, New York, NY 10003 USA | en_US |
dc.contributor.affiliationother | NYU, Dept Phys, New York, NY 10003 USA | en_US |
dc.contributor.affiliationother | CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/60602/1/Koester2007MaxBCGRed.pdf | |
dc.identifier.doi | http://dx.doi.org/10.1086/512092 | en_US |
dc.owningcollname | Astrophysics (Physics, Department of) |
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