Title：Detecting high-redshift objects through the near-infrared background

Speaker：Postdoctor Bin Yue
Unit：Scuola Normale Superiore
Time：2015.10.03（Friday） 10:00
Place：Physics Building 573, Haiyun Campus, Xiamen University
Abstract：Emission from both high-redshift dwarf galaxies and first stars must contribute to the near-infrared background (NIRB), therefore the NIRB has the potential to provide information on their properties. However in practice it is rather challenging to extract their signal. On small scales the measured NIRB flux fluctuations are dominated by shot noise of remaining low-redshift galaxies. While on large scales (~1000 arcsec) the fluctuations level is about 5 times higher than the known sources and 30 times higher than the high-redshift component. It leaves us three questions: 1) what is the precise contribution of high-redshift galaxies and first stars to the NIRB; 2) what is the origin of the “clustering excess”; and 3) what can we learn about high-redshift galaxies from the NIRB. I will present my attempts at finding out the answers.

Speaker Information：

Research interests: First stars/galaxies/black holes and reionization; high-redshift Universe; the cosmic infrared background; numerical simulation; gravitational lensing; ...

Work experiences:
July 2013 to date, Scuola Normale Superiore, Pisa, Italy; postdoc
July 2012 - June 2013, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China; temporary position

Education experiences:
Ph.D (Astrophysics): September 2005 - July 2012, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China. Title of Ph.D thesis: “The formation of first generation stars and the related theoretical research”. Supervisor: Prof. Xuelei Chen
15 May 2012 - 15 July 2012, visiting student at Scuola Normale Superiore, Pisa, Italy
3 February 2008 - 5 September 2008, visiting student at Max-Planck Institute for Astrophysics, Garching, Germany
B.S. (Astronomy): September 2001 - July 2005, Department of Astronomy, Beijing Normal University, Beijing, China