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Recent years have seen emerging theoretical efforts to understand how dwarf galaxies evolve with their circumgalactic medium (CGM), where stellar feedback is expected to be more efficient because of the galaxies’ weak gravitational potential. However, the CGM of dwarf galaxies beyond z~0 is largely inaccessible, because the faintness and small halo sizes of these galaxies make it difficult to find close QSO sightlines for absorption line studies. In this talk, I will describe my resent work on the CGM metal budget and feedback efficiency in some of the lowest mass galaxies in the Universe. I will evaluate the performance of recent simulations of dwarf galaxies and highlight that, with a rich HST archive and upcoming all-sky surveys (e.g., LSST), it is now possible to directly compare the observed and predicted properties of the CGM of dwarf galaxies.
Yong Zheng is a Miller Postdoc Fellow at the University of California Berkeley. She received a PhD from Columbia University in the City of New York. Before moving to New York, she completed her bachelor degree at Peking University. Yong's research interests include galaxy evolution and the cosmic baryon cycle, and she is a frequent user of the Hubble Space Telescope, the Keck Observatory, and several radio facilities.
Video record is available: https://vshare.sjtu.edu.cn/open/fdc14f91f6d4c4d3d8515589fe927e13