Speaker: Lingyu Wang (Sussex University, UK; member of HerMES team)
Time: 14:00, 3 Sept. 2012 (Monday)
Place: meeting room on the 3rd floor of SHAO
Title: The abundance and clustering properties of infrared galaxies
Abstract:
The Herschel Multi-Tiered Extragalactic Survey (HerMES) is the largest Guaranteed Time Key Project on Herschel. It covers most of the well-studied extragalactic multi-wavelength fields, enabling detailed studies of the physical properties of infrared galaxies out to high redshifts. Its wedding cake survey design allows us to probe a wide of
luminosities and environments. In my talk, I will briefly describe the HerMES project, its science goals and current datasets. For the main part of my talk, I will focus on the statistical properties of the infrared galaxy populations we observe. In particular, I will present the number counts of infrared galaxies derived from a variety of
methods, including direct source extraction, P(D) (probability of deflection) and stacking. I will also present our results on the clustering properties of infrared galaxies, including the correlation functions of bright sources and power spectrum of the background intensity fluctuations. The abundance and clustering statistics of
infrared galaxies, interpreted through a halo model, provide crucial information on the connection between star formation and dark matter halos.