J/ApJ/772/131ivo://CDS.VizieR/J/ApJ/772/131doi:10.26093/cds/vizier.17720131CDSDawson W.A.2017-11-28T13:21:54Z2015-03-09T13:04:48ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frgalaxy-clustersgalaxiesvisible-astronomyspectroscopyredshiftedMerging galaxy clusters have become one of the most important probes of dark matter, providing evidence for dark matter over modified gravity and even constraints on the dark matter self-interaction cross-section. To properly constrain the dark matter cross-section it is necessary to understand the dynamics of the merger, as the inferred cross-section is a function of both the velocity of the collision and the observed time since collision. While the best understanding of merging system dynamics comes from N-body simulations, these are computationally intensive and often explore only a limited volume of the merger phase space allowed by observed parameter uncertainty. Simple analytic models exist but the assumptions of these methods invalidate their results near the collision time, plus error propagation of the highly correlated merger parameters is unfeasible. To address these weaknesses I develop a Monte Carlo method to discern the properties of dissociative mergers and propagate the uncertainty of the measured cluster parameters in an accurate and Bayesian manner. I introduce this method, verify it against an existing hydrodynamic N-body simulation, and apply it to two known dissociative mergers: 1ES 0657-558 (Bullet Cluster) and DLSCL J0916.2+2951 (Musket Ball Cluster).2013ApJ...772..131Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/772/131CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/540/A43 : New redshifts for Abell 1758N galaxies (Boschin+, 2012)J/ApJS/188/280 : Spectroscopic catalog in 24 clusters (Stern+, 2010)J/MNRAS/406/1318 : Lensed-arc statistics of galaxy clusters (Horesh+, 2010)J/A+A/503/357 : Redhift catalog of A1237+A1240 galaxies (Barrena+, 2009)J/A+A/491/379 : Velocities of galaxies in Abell 520 (Girardi+, 2008)J/AJ/129/31 : A deep radio survey of Abell 2125. II (Owen+, 2005)J/A+A/430/19 : VRI photometry of Abell 3921 galaxies (Ferrari+, 2005)J/AJ/125/2427 : 1.4GHz flux densities of Abell 2255 galaxies (Miller+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/772/131https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/772/131http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/772/131https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/772/131https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/772/131http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/772/131GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/772/131/table4 (Musket Ball Cluster redshift catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/772/131/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/772/131/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/772/131/table4?GETtext/xml+votable180.050000true138.9172583329.918530560.0055555555555555566/4964 4966https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/772/131?format=asciiOpticaldefaultJ/ApJ/772/131/table4Musket Ball Cluster redshift catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[9] Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000[29] Degree of Declination (J2000)pos.eq.dec;meta.mainePos[0.5/1.3] Positional uncertaintyarcsecstat.error;posfloatz[0.02/1.4] Spectroscopic redshiftsrc.redshiftdoublee_z[0/5]? Error in zstat.error;src.redshiftdoublenullabler_zSource of z (1)meta.ref;pos.framecharRmag[17.9/24.9]? The R band magnitudemagphot.mag;em.opt.Rfloatnullablee_Rmag[0.001/0.09]? Error in Rmagmagstat.error;phot.mag;em.opt.RfloatnullableSimbadSimbad column added by the CDSmeta.ref.urlchar