Photometric mass and mass decomposition in early-type lens galaxies

Understand

By using the SDSS multicolor photometry and lens modeling, we study stellar mass properties and the luminous and dark matter composition of the 57 early-type lens galaxies analyzed by the SLACS Survey.

• We fit the lens SEDs composed of ugriz magnitudes with a three-parameter grid of different composite stellar population models, computed by adopting solar metallicity and various IMFs, and we employ the best-fit values of the total projected mass enclosed within the Einstein ring of each system.
• We measure size-stellar mass and surface stellar mass density-stellar mass relations consistent with those determined for non-lens galaxies.
• We find statistically significant evidence that more massive lens galaxies tend to form in regions of higher galaxy density, as for all early-type galaxies.