题  目：The South Pole Telescope & CCAT Project

报告人：Dr.Steve Padin
　　　　　 (California Institute of Technology)

摘  要：

1）The South Pole Telescope

The South Pole Telescope (SPT) is a 10-m, off-axis Gregorian telescope equipped with a ~1k-pixel, 3-color, millimeter-wave bolometer camera. The telescope has an unblocked aperture, shielded beams, and co-moving ground shields to minimize systematic errors due to scattering. SPT is surveying a few thousand square degrees of sky to find galaxy clusters using the Sunyaev-Zel'dovich (SZ) effect. The goal is to set constraints on dark energy by measuring the redshift evolution of the density of clusters. SPT has made the first blind detections of clusters using the SZ effect and it has measured secondary cosmic microwave background anisotropy on small angular scales.

2）CCAT

CCAT will be a 25 m diameter, Ritchey-Chretien telescope operating in the 0.2 to 2 mm wavelength range. It will be located at 5600 m on Cerro Chajnantor in the Atacama Desert, near ALMA. CCAT will probe the growth of structure over cosmic time, from the first giant starbursts to nearby star and planet forming regions. CCAT will be a powerful survey instrument, taking full advantage of recent advances in submillimeter detector arrays. The instrument suite will include ~100k-pixel multi-band cameras, and multi-object spectrometers that can observe tens of sources simultaneously.

时  间：2010年7月5日（星期一）上午10:00

地  点：紫台大楼四楼大会议室（北京西路2号）

欢迎各位老师和同学积极参加

　　　　　　　　　　　　　　　　　　 紫金山天文台学术委员会学术交流工作委员会 

　　　　　　　　　　　　　　　　　　　　　　　　　　　 2010年6月25日