Weak lensing magnification of SpARCS galaxy clusters
dc.contributor.author | Tudorica, A. | |
dc.contributor.author | Hildebrandt, H. | |
dc.contributor.author | Tewes, M. | |
dc.contributor.author | Hoekstra, H. | |
dc.contributor.author | Morrison, C.B. | |
dc.contributor.author | Muzzin, A. | |
dc.contributor.author | Wilson, G. | |
dc.contributor.author | Yee, H.K.C. | |
dc.contributor.author | Lidman, C. | |
dc.contributor.author | Hicks, A. | |
dc.contributor.author | Nantais, J. | |
dc.contributor.author | Erben, T. | |
dc.contributor.author | Van Der Burg, R.F.J. | |
dc.contributor.author | Demarco, R. | |
dc.date.accessioned | 2018-06-26T20:22:07Z | |
dc.date.available | 2018-06-26T20:22:07Z | |
dc.date.issued | 2017 | |
dc.description | Indexación: Scopus. | es_ES |
dc.description.abstract | Context. Measuring and calibrating relations between cluster observables is critical for resource-limited studies. The mass-richness relation of clusters offers an observationally inexpensive way of estimating masses. Its calibration is essential for cluster and cosmological studies, especially for high-redshift clusters. Weak gravitational lensing magnification is a promising and complementary method to shear studies, that can be applied at higher redshifts. Aims. We aim to employ the weak lensing magnification method to calibrate the mass-richness relation up to a redshift of 1.4. We used the Spitzer Adaptation of the Red-Sequence Cluster Survey (SpARCS) galaxy cluster candidates (0.2 < z < 1.4) and optical data from the Canada France Hawaii Telescope (CFHT) to test whether magnification can be effectively used to constrain the mass of high-redshift clusters. Methods. Lyman-break galaxies (LBGs) selected using the u-band dropout technique and their colours were used as a background sample of sources. LBG positions were cross-correlated with the centres of the sample of SpARCS clusters to estimate the magnification signal, which was optimally-weighted using an externally-calibrated LBG luminosity function. The signal was measured for cluster sub-samples, binned in both redshift and richness. Results. We measured the cross-correlation between the positions of galaxy cluster candidates and LBGs and detected a weak lensing magnification signal for all bins at a detection significance of 2.6-5.5σ. In particular, the significance of the measurement for clusters with z> 1.0 is 4.1σ; for the entire cluster sample we obtained an average M200 of 1.28 -0.21 +0.23 × 1014 M⊙. Conclusions. Our measurements demonstrated the feasibility of using weak lensing magnification as a viable tool for determining the average halo masses for samples of high redshift galaxy clusters. The results also established the success of using galaxy over-densities to select massive clusters at z > 1. Additional studies are necessary for further modelling of the various systematic effects we discussed. | es_ES |
dc.description.uri | https://www.aanda.org/articles/aa/pdf/2017/12/aa31267-17.pdf | |
dc.description.uri | https://www.aanda.org/articles/aa/abs/2017/12/aa31267-17/aa31267-17.html | |
dc.identifier.citation | Astronomy and Astrophysics, 608, art. no. A141. | es_ES |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | DOI: 10.1051/0004-6361/201731267 | |
dc.identifier.uri | http://repositorio.unab.cl/xmlui/handle/ria/6203 | |
dc.language.iso | en | es_ES |
dc.publisher | EDP Sciences | es_ES |
dc.subject | Galaxies: clusters: general | es_ES |
dc.subject | Galaxies: clusters: individual: SpARCS | es_ES |
dc.subject | Gravitational lensing: weak | es_ES |
dc.title | Weak lensing magnification of SpARCS galaxy clusters | es_ES |
dc.type | Artículo | es_ES |
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