Mass variance from archival X-ray properties of Dark Energy Survey Year-1 
galaxy clusters

Farahi, A.; Chen, X.; Evrard, A. E.; Hollowood, D. L.; Wilkinson, R.; Bhargava, S.; Giles, P.; Romer, A. K.; Jeltema, T.; Hilton, M.; Bermeo, A.; Mayers, J.; Cervantes, C. Vergara; Rozo, E.; Rykoff, E. S.; Collins, C.; Costanzi, M.; Everett, S.; Liddle, A. R.; Mann, R. G.; Mantz, A.; Rooney, P.; Sahlen, M.; Stott, J.; Viana, P. T. P.; Zhang, Y.; Annis, J.; Avila, S.; Brooks, D.; Buckley-Geer, E.; Burke, D. L.; Rosell, A. Carnero; Kind, M. Carrasco; Carretero, J.; Castander, F. J.; da Costa, L. N.; Vicente, J. De; Desai, S.; Diehl, H. T.; Dietrich, J. P.; Doel, P.; Flaugher, B.; Fosalba, P.; Frieman, J.; García-Bellido, J.; Gaztanaga, E.; Gerdes, D. W.; Gruen, D.; Gruendl, R. A.; Gschwend, J.; Gutierrez, G.; Honscheid, K.; James, D. J.; Krause, E.; Kuehn, K.; Kuropatkin, N.; Lima, M.; Maia, M. A. G.; Marshall, J. L.; Melchior, P.; Menanteau, F.; Miquel, R.; Ogando, R. L. C.; Plazas, A. A.; Sanchez, E.; Scarpine, V.; Schubnell, M.; Serrano, S.; Sevilla-Noarbe, I.; Smith, M.; Sobreira, F.; Suchyta, E.; Swanson, M. E. C.; Tarle, G.; Thomas, D.; Tucker, D. L.; Vikram, V.; Walker, A. R.; Weller, J.

doi:10.1093/mnras/stz2689

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Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters

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Weller, J.
Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society;

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引用

Farahi, A., Chen, X., Evrard, A. E., Hollowood, D. L., Wilkinson, R., Bhargava, S., Giles, P., Romer, A. K., Jeltema, T., Hilton, M., Bermeo, A., Mayers, J., Cervantes, C. V., Rozo, E., Rykoff, E. S., Collins, C., Costanzi, M., Everett, S., Liddle, A. R., Mann, R. G., Mantz, A., Rooney, P., Sahlen, M., Stott, J., Viana, P. T. P., Zhang, Y., Annis, J., Avila, S., Brooks, D., Buckley-Geer, E., Burke, D. L., Rosell, A. C., Kind, M. C., Carretero, J., Castander, F. J., da Costa, L. N., Vicente, J. D., Desai, S., Diehl, H. T., Dietrich, J. P., Doel, P., Flaugher, B., Fosalba, P., Frieman, J., García-Bellido, J., Gaztanaga, E., Gerdes, D. W., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Honscheid, K., James, D. J., Krause, E., Kuehn, K., Kuropatkin, N., Lima, M., Maia, M. A. G., Marshall, J. L., Melchior, P., Menanteau, F., Miquel, R., Ogando, R. L. C., Plazas, A. A., Sanchez, E., Scarpine, V., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Smith, M., Sobreira, F., Suchyta, E., Swanson, M. E. C., Tarle, G., Thomas, D., Tucker, D. L., Vikram, V., Walker, A. R., & Weller, J. (2019). Mass variance from archival X-ray properties of Dark Energy Survey Year-1 galaxy clusters. Monthly Notices of the Royal Astronomical Society, 490(3), 3341-3354. doi:10.1093/mnras/stz2689.

引用: https://hdl.handle.net/21.11116/0000-0005-955B-D

要旨

Using archival X-ray observations and a lognormal population model, we estimate constraints on the intrinsic scatter in halo mass at fixed optical richness for a galaxy cluster sample identified in Dark Energy Survey Year-One (DES-Y1) data with the redMaPPer algorithm. We examine the scaling behaviour of X-ray temperatures, T_X, with optical richness, λ_RM, for clusters in the redshift range 0.2 < z < 0.7. X-ray temperatures are obtained from Chandra and XMM observations for 58 and 110 redMaPPer systems, respectively. Despite non-uniform sky coverage, the T_X measurements are >50 per cent complete for clusters with λ_RM on the two samples produces consistent posterior scaling parameters, from which we derive a combined constraint on the residual scatter, σ_lnT|λ=0.275±0.019⁠. Joined with constraints for T_X halo mass from the Weighing the Giants program and richness–temperature covariance estimates from the LoCuSS sample, we derive the richness-conditioned scatter in mass, σ_lnM|λ=0.30±0.04_(stat)±0.09_(sys) at an optical richness of approximately 100. Uncertainties in external parameters, particularly the slope and variance of the T_X–mass relation and ⁠, scaling with > 130. Regression analysis the covariance of T_X and λ_RM at fixed mass, dominate the systematic error. The 95 per cent confidence region from joint sample analysis is relatively broad, σ_lnM|λ∈[0.14,0.55]⁠, or a factor 10 in variance.