This week's special Lunch Talk will be given by Yuling Zhang (張淯翎), at 11:30AM Nov. 20(Wednesday) in the 19th-floor Observatory Hall (天文台报告厅).  He will present his work on "the Multi-Frequency studies of blazars".

Abstract: Observations have shown that blazars (a special sub-class of active galactic nuclei) of the high synchrotron peak type (HSPs) play a crucial role in TeV/Very High Energy (VHE) astronomy. To provide a large list of potential VHE emitters, and therefore candidate targets for current and future TeV instruments, we have assembled a catalog including over 2000 confirmed and candidate HSP blazars selected on the basis of multi-frequency data. The catalog, named 3HSP, is currently the largest and most complete sample of HSP blazars, and can be used for detailed statistical properties of the whole HSP population and may shed light on some of the the long-standing issues in the cosmological evolution of blazars.

You are welcome to join the discussion. We will provide boxed food from the faculty canteen. Please sign up via WeChat (Journal Club group) before Nov. 20th (Wed) 9 AM. The boxed food contains two meat dishes and two vegetable dishes by default, please add a * after your name if you want a vegetarian meal. Those who sign up but don't attend on time should pay a￥20 fee for the food, which will be used for future academic activities.