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"Astrophysics Seminar: Evolving Galaxies across Cosmic Time: The Individual and Ensemble Perspective" | The Racah Institute of Physics

"Astrophysics Seminar: Evolving Galaxies across Cosmic Time: The Individual and Ensemble Perspective"

Date: 
Tue, 09/12/201412:30-13:30
Location: 
Kaplun building, Room No. 200
Lecturer: Mr. Sandro Tacchella Affiliation: ETH Zurich Abstract: We have gained many new insights in the formation of the first galaxies at very high redshifts (z~8-10) and the major buildup of the most massive ellipticals, bulges and disks at the peak of cosmic star formation rate (z~2) in the last century. I will show how we need to study individual galaxies as well as the whole population to understand how galaxies form and evolve with time. I start with a simple model that links the galaxy properties to the underlying dark matter population and successfully predicts the UV luminosity function from z~10 to z=0. To constrain the mass assembly and early evolution of z~2 star- forming galaxies, I present a synergy between Hubble Space Telescope and Very Large Telescope data to resolve the stellar mass and star formation distribution on 1-2 kpc scales. We find that the massive z~2 galaxies already have mature bulges and reduced star formation activity in their center, sustaining their high star-formation rates of about hundred solar masses per year in their outskirts. Additional details of the upcoming Astrophysics' seminars can be found on the following link. ‏האירוע הזה כולל שיחת וידאו ב-Google Hangouts. הצטרף: https://hangouts.google.com/hangouts/_/mail.huji.ac.il/astrophysics?hceid=bWFpbC5odWppLmFjLmlsX2c0czhydDlpcmhwZzRvdGNybWIzZGFqcjdvQGdyb3VwLmNhbGVuZGFyLmdvb2dsZS5jb20.kgv12v3nhcqopv13lbucrh7sd4&hs=121