|Speaker||Talk Date||Talk Series|
|Khee-Gan Lee (Princeton)||29 September 2010||Institute of Astronomy Seminars|
The Lyman-alpha Forest is an important probe of the inter-galactic medium (IGM), which comprises >90% of baryons at high redshifts and is the reservoir for galaxy formation. At z<3, HeII reionization is predicted to be the dominant process in regulating the properties of the IGM. I will introduce a new statistic, the threshold clustering functions, which can detect thermal inhomogeneities from HeII reionization when applied to SDSS data. I will also discuss some of the systematics involved, and quantify the ability of this statistic to distinguish between different toy models of the IGM.