Astrophysics Colloquium: Laura Ferrarese (Herzberg Astrophysics) PAB

11:00am to 12:00pm
Thursday April 27th, 2017

Baryonic Structures in the Virgo Cluster: New Results from the NGVS

At a distance of 16.5 Mpc and with a gravitating mass of almost 10^15 solar masses, the Virgo Cluster is the dominant mass concentration in the local universe, the centre of the Local Supercluster, and the largest concentration of galaxies within ∼35 Mpc. With thousands of member galaxies lying at a nearly common distance and spanning virtually all known morphological types, it has historically played a key role in studies of how galaxies form and evolve in dense environments. In this talk, I will describe results from the Next Generation Virgo Cluster Survey (NGVS), a large CFHT/MegaCam programme carried out between 2009 and 2013. Topics will include the identification of low-mass galaxies, the galaxy luminosity function, structural properties (including ultra-compact and ultra-diffuse galaxies), stellar content and nuclear star clusters. I will use these diverse observations to discuss implications for cosmological models of structure formation.

Campus, PAB 102/103