Colloquia Schedule

Scott Chapman (Dalhousie University)

Oct. 30, 2014, 3:45 p.m. — LGRT 1033
Title: The role of ultra-luminous galaxies in galaxy formation and evol

Abstract: I will provide an overview of ultra-luminous galaxies (L_IR>1012 Lsun) at high redshift, and the different roles and properties they appear to exhibit as a function of their luminosity. I will focus on the molecular gas properties of the galaxies as the crucial fuel available for star formation, emphasizing our recent work with ALMA and the IRAM Plateau-de-Bure, where we have studied galaxies preselected at various wavelengths, and conducted blind surveys for CO gas. I will conclude with very wide field surveys (SPT) that are uncovering the most extreme specimens of star forming galaxies in the universe, and point to future facilities like CCAT which will push the field to a new level of understanding.

Erik Tollerud (Yale University)

Nov. 6, 2014, 3:45 p.m. — LGRT 1033
Title: TBA

Nick Cowan (Amherst College)

Nov. 13, 2014, 3:45 p.m. — LGRT 1033
Title: TBA

Mike Dunham (CfA)

Nov. 20, 2014, 3:45 p.m. — LGRT 1033
Title: TBA

Stephanie LaMassa (Yale University)

Dec. 4, 2014, 3:45 p.m. — LGRT 1033
Title: Discovering Rare AGN with the Stripe 82X X-ray Survey

Abstract: Supermassive black holes (SMBHs) grow by accreting matter in a phase where they are observed as active galactic nuclei (AGN). In order to track the evolution of rare objects, such as AGN at high luminosity, which signal when the majority of black hole growth occurred, a large volume of the Universe has to be explored through wide area surveys. Until recently, no large area X-ray survey has existed, meaning that a key phase in SMBH growth and SMBH/galaxy co-evolution is missing: luminous obscured SMBH growth. To rectify this gap, I have begun a wide area X-ray survey in the Sloan Digital Sky Survey region Stripe 82 which contains a veritable treasure trove of multi-wavelength coverage, expediting follow-up of identified X-ray sources. In this talk, I will review the highlights of our first release of "Stripe 82X" which covers ~16.5 deg^2 with ~3300 X-ray sources identified. I will discuss our current ground-based follow-up campaigns to target interesting classes of AGN and will comment on what we expect to learn with the addition of 20 deg^2 awarded to our team in the current XMM-Newton observing cycle.

Kaitlin Kratter (University of Arizona)

Dec. 11, 2014, 3:45 p.m. — LGRT 1033
Title: TBA