Space-based Wide-field Slitless Spectroscopy and Near-Ultraviolet Imaging

演讲人: Xin Wang UCAS
时间: 2022-11-10 14:00-2022-11-10 15:00
地点:S727 + Zoom Meeting (ID:940 4231 0038, password: 202211)

In this talk, the speaker will briefly review the observing modes of wide-field slitless spectroscopy and near-ultraviolet (NUV) imaging, enabled by the cutting-edge instruments on board current space telescopes, i.e. the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST). He will first introduce the multiple observing programs that acquired deep near-infrared grism and NUV imaging data for which he has been responsible for producing the science-enabling data products, e.g., GLASS, UVCANDELS, MAMMOTH-Grism, and GLASS-JWST. He will focus on two science topics, i.e., 1) the (spatially resolved) chemical evolution of high-redshift galaxies and 2) the constraints on the escape fraction of the ionizing radiation, as two examples of the extragalactic sciences that these unique data sets enable. Finally, the speaker will discuss the prospects for the data to be acquired by the main survey camera of our Chinese Space Station Telescope, which is also designed to specialize on grism spectroscopy and NUV imaging, and talk about how they can benefit from the key experiences on these observing modes.


Xin Wang (王鑫) is currently an Associate Professor in the School of Astronomy and Space Science, University of Chinese Academy of Sciences (UCAS). Before professorship, Xin spent three years as a postdoctoral research associate at Caltech/IPAC. Before Caltech, Xin earned his Ph.D. in Astronomy & Astrophysics from UCLA in 2019. Xin has been the PI of two medium HST programs, awarded 45 orbits of deep near-infrared slitless spectroscopy and 38 orbits of ultra-deep near-ultraviolet imaging in cycles 28 and 30, respectively. Xin is the co-I of three JWST cycle-1 programs, including the 591-hour pure-parallel PASSAGE program and the GLASS ERS program. Xin is selected by NASA as one of the participants in the inaugural JWST master class, and has hosted several JWST proposal planning workshops for the community. Xin has great expertise in the reduction and analysis of space-based wide-field slitless spectroscopy, multi-band imaging and photometry, and has been responsible for producing the science-enabling data products for the GLASS and UVCANDELS HST treasury programs, in addition to leading the two medium HST programs mentioned above. In particular, Xin developed a novel method of spatially resolved analysis of high-redshift galaxies via slitless spectroscopy, to study the effects of gas flows, star formation and galactic feedback on the baryon cycle and galaxy chemo-structural evolution.