Home | Contact | Sitemap | 中文 | CAS
Search:
About Us Research People International Cooperation News Education & Training Join Us Journals Papers Resources Links
Location: Home > News > Seminars
News
  • Events
  • DAMPE
  • Seminars
  • Research Trends
  • X-ray Dust Scattering in the Direction of Galactic Centre

     

     

    Seminar Title  

     X-ray Dust Scattering in the Direction of Galactic Centre

       
    Speaker:   Dr JIN Chichuan
       

     Affiliation:    

     (NAOC)
       
    When

    Thursday afternoon, May 31, 16:00 p.m

       

    Where:   

    Room 212, Astronomy Building
     

                             Welcome to Attend   

     
      ( PMO Academic Committee & Academic Circulating committee)
     

       Abstract: The Galactic Centre (GC) region contains many bright X-ray sources and has a high column density of foreground interstellar medium. This suggests that X-ray dust scattering should be ubiquitous and intensive in the GC direction. In my presentation, I will report our recent major progress in discovering various significant effects of dust scattering for GC X-ray sources. As an example, I will show that X-ray dust scattering can severely bias the observed spectrum of the GC LMXB AX J1745.6-2901 at 1.45 arcmin away from the Galactic SMBH Sgr A*, and explain its peculiar eclipse light curves. This study also allows us to put constraints on the GC foreground dust distribution, which indicate that most of the dust along the line-of-sight should reside in the Galactic disk rather than in the GC. I will also show that dust scattering halo is commonly observed around many GC sources, and so its spectral timing effects should be seriously considered for all these sources, including Sgr A*. Finally, I will introduce our Xspec models for the spectral correction of GC foreground dust scattering. 

     

     

    Copyright © Purple Mountain Observatory, CAS, No.8 Yuanhua Road, Qixia District, Nanjing 210034, China
    Phone: 0086 25 8333 2000 Fax: 8333 2091 http://english.pmo.cas.cn