Detailed Cluster Mass and Light profiles of A1703, A370 and RXJ1347-11 from Deep Subaru Imaging - Astrophysics > Cosmology and Nongalactic AstrophysicsReportar como inadecuado




Detailed Cluster Mass and Light profiles of A1703, A370 and RXJ1347-11 from Deep Subaru Imaging - Astrophysics > Cosmology and Nongalactic Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: Weak lensing work can be badly compromised by unlensed foreground and clustermembers which dilute the true lensing signal. We show how the lensing amplitudein multi-colour space can be harnessed to securely separate cluster membersfrom the foreground and background populations for three massive clusters,A1703 z=0.258, A370 z=0.375 and RXJ1347-11 z=0.451 imaged with Subaru.The luminosity functions of these clusters when corrected for dilution, showsimilar faint-end slopes, \alpha ~= -1.0, with no marked faint-end upturn toour limit of M R ~= -15.0, and only a mild radial gradient. In each case, theradial profile of the M-L ratio peaks at intermediate radius, ~=0.2r {vir}, ata level of 300-500M-L R \odot, and then falls steadily towards~100M-L R {\odot} at the virial radius, similar to the mean field level. Thisbehaviour is likely due to the relative paucity of central late-type galaxies,whereas for the E-S0-sequence only a mild radial decline in M-L is found foreach cluster. We discuss this behaviour in the context of detailed simulationswhere predictions for tidal stripping may now be tested accurately withobservations.



Autor: Elinor Medezinski, Tom Broadhurst, Keiichi Umetsu, Masamune Oguri, Yoel Rephaeli, Narciso Benítez

Fuente: https://arxiv.org/



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