Density field, Cosmic Web environment, and galaxy type measurements

March 7, 2017

Local density field, cosmic web environment, and galaxy type measurements for COSMOS galaxies from Darvish et al. (2017) ApJ 837:16 are now available for download.

The density field (local density), the cosmic web environment (cluster, filament, field) and galaxy type (central, satellite, isolated) are derived for a mass complete sample of galaxies out to z=1.2 from the COSMOS15 catalog (Laigle et al. 2016). The local density estimation is based on the weighted adaptive kernel smoothing algorithm (Darvish et al. 2015). The cosmic web extraction relies on the density field Hessian matrix and breaks the density field into clusters, filaments, and the field.

Two tables are currently provided and can be downloaded here.
Table 1: All galaxies used for environmental measurements are given. They are located in the range 149.33 < RA(deg) < 150.8, 1.6 < Dec(deg) < 2.83, are in the redshift range 0.1 < z < 1.2, and have stellar masses log(M/Msun)>=9.6 (Chabrier IMF). This table is also presented in Darvish et al. (2017).
Table 2: All galaxies in the redshift range 0.1 < z < 1.2 are interpolated to the environmental measurements. No mass and coordinate cuts are applied.