S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
An ultra-deep view of disk galaxies: what is out there?
Instituto de Astrofísica de Canarias
Seminari del departament d'Astronomia i AstrofÃsica
Divendres 11 maig 2012
In the last years, there is a growing consensus that our traditional picture of disk galaxies being purely described by an exponential decline in brightness is unsustainable. In fact, the nature of the outer regions of the spiral galaxies seem to be much richer both in shapes and in stellar population properties. All this richness informs us about the way disk galaxies are assembled over time. I will summarize what we have learned recently about the nature of the outer regions of the spiral galaxies, putting a particular focus into a set of new deep observations with the SDSS Stripe82 reaching 30 mag/arcsec^2.