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  • A White Dwarf with an Actively Disintegrating Asteroid and Working at Gemini Observatory


    Seminar Title  


    A White Dwarf with an Actively Disintegrating Asteroid and Working at Gemini Observatory


    Speaker:   DrXU Siyi


    (Gemini Observatory)  

    When Thursday afternoon, Jan. 4, 14:30 p.m


    Room 302, Astronomy Building

                             Welcome to Attend   

      ( PMO Academic Committee & Academic Circulating committee)

       Abstract: This talk consists of two parts. In the first part, I will talk about the recent discovery of an actively disintegrating asteroid around the white dwarf WD 1145+017. The white dwarf is heavily polluted, displays excess infrared radiation from a dust disk, and also has circumstellar gas. I will present our recent photometric observations from ultraviolet to 4.5 micron and how this system fits into the overall understanding of the fate of planetary systems. In the second part, I will talk about my experience working at Gemini Observatory and European Southern Observatory (ESO). I will highlight the capabilities of different instruments and recent discoveries.

        XU Siyi  is currently an assistant astronomer (tenure track) of the Gemini Observatory. She obtained her Bachelor degree from the School of Astronomy and Space Science, Nanjing University in 2010, and her PhD degree in Astrophysics from UCLA in 2014. She was then awarded an ESO post-doctoral fellowship, spending her time in Germany and Chile, until the summer of 2017 when she joined the Gemini Observatory. Her research interest focuses on stellar and planetary physics using optical and IR imaging and spectroscopy.



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