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On the Initial Mass Function and tilt of the Fundamental Plane of massive early-type galaxies
C. Grillo, R. Gobat
We investigate the most plausible stellar Initial Mass Function (IMF) and the main origin of the tilt of the Fundamental Plane (FP) for old, massive early-type galaxies. We conside…
Golden gravitational lensing systems from the Sloan Lens ACS Survey. I. SDSS J1538+5817: one lens for two sources
C. Grillo, T. Eichner, S. Seitz +4
We present a lensing and photometric study of the exceptional system SDSS J1538+5817, identified by the SLACS survey. The lens is a luminous elliptical at redshift z=0.143. Using H…
Multi-wavelength study of XMMU J2235.3-2557: the most massive galaxy cluster at z > 1
P. Rosati, P. Tozzi, R. Gobat +14
[Abridged] XMMU J2235.3-2557 is one of the most distant X-ray selected clusters, spectroscopically confirmed at z=1.39. We characterize the galaxy populations of passive members, t…
Photometric mass and mass decomposition in early-type lens galaxies
C. Grillo, R. Gobat, M. Lombardi +1
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…
Multi-wavelength observations of a rich galaxy cluster at z ~ 1: the HST/ACS colour-magnitude diagram
Joana S. Santos, Piero Rosati, Raphael Gobat +12
XMMU J1229+0151 is a rich galaxy cluster with redshift z=0.975, that was serendipitously detected in X-rays within the scope of the XMM-Newton Distant Cluster Project. HST/ACS obse…