题 目: Spitzer Mid-Infrared Observations of Blue Compact Dwarf Galaxies

报告人： Dr. Wu, Yanling

Cornell Univ., USA

摘要：Blue Compact Dwarf Galaxies (BCDs) are galaxies that are characterized by their blue optical colors, low luminosities and small sizes. BCDs are found to typically have low, sub-solar, metallicities and proposed to be used as local laboratory to study the star formation in the early universe. The unprecedented sensitivity of the Spitzer Space Telescope has enabled us for the first time to detect a large sample of these low luminosity systems, proving the presence/absence of the Polycyclic Aromatic Hydrocarbon features. In addition, using the high-resolution spectroscopy, we study the elemental abundances of neon and sulfur in BCDs and compare with the results from optical studies. Finally, we also analyze the FIR/radio correlation in low luminosity galaxies and expand the discussion to the mid-IR.

时 间：2008年7月24日（星期五），下午3:30

地 点：（北京西路2号）紫台大楼3楼327会议室

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2008年7月19日