Shanghai Astronomical Observatory Astrophysics Colloquium

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

Speaker：Prof. Xin Wang (University of Chinese Academy of Sciences)

Location: Lecture Hall, 3rd floor

Tencent Conference ID: 429-1540-0486 password: 6360

Time：3:00 pm April 13th (Thursday)

Abstract：

In this talk, I 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). I will first introduce the multiple observing programs that acquired deep near-infrared grism and NUV imaging data for which I’ve been responsible for producing the science-enabling data products, e.g., GLASS, UVCANDELS, MAMMOTH-Grism, and GLASS-JWST. I 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, I 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 we can benefit from the key experiences on these observing modes.

CV：

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.

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