Seminar

The Formation and Observational Signatures of the First Quasars

Recent multi-wavelength surveys have discovered dozens of luminous quasars at redshift z > 6. They indicate the presence of supermassive black holes of ~10^{9} Msun, and large stellar population of ~10^{11} Msun when the Universe was only a few hundred million years after the Big Bang. However, how these objects form and evolve remains a big puzzle. I will present state-of-the-art calculations, which combine multi-scale cosmological simulations with multi-wavelength radiative transfer, to follow the formation, evolution, and multi-band properties of galaxies and quasars in the early Universe. Our models demonstrate that the exciting observations of the most distant objects are consistent with predictions from the standard LCDM cosmology. The earliest galaxies and quasars form in massive halos hierarchically and are highly clustered, which may provide patchy ionization of the surrounding medium. In addition, I will discuss the need for such a modeling in future study of galaxy formation in all epochs, and in planning surveys with upcoming observatories such as ALMA and JWST.

At a slightly lower redshift than these quasars, just outside the Perkin Reading Room, we'll have a selection of tea, coffee, cookies, and fruit for your enjoyment. The seminars are held in the Perkin Reading Room, on the 5th floor of the Rose Center for Earth and Space. Enter the museum at 81st Street and Central Park West, call a department member from your cell, the guard desk, or ticket booth for escort upstairs to the Perkin Room. Please arrive approximately 15 min. prior to the event.

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