"Mirage" sources and large offsets: interconnected phenomena

by Dr Yiwei Bao (Nanjing University)

Wednesday 31 Jan 2024, 09:00 → 09:30 Asia/Shanghai

TDLI Meeting Room N601 (East Wing of Floor 6, North Building)

Abstract

LHAASO collaboration has discovered a couple of asymmetric source, and many sources with large offsets. We show that a large asymmetric halo may be mis-identified as multiple "mirage" sources, and asymmetric diffusion could lead to a very large offset between the injection site and the identified halo, these two phenomena can be interpreted in the same framework. We add background noise into the region of interest and use statistical method as is used by LHAASO to identify the sources. We utilize the concept of asymmetric diffusion to elucidate several observed sources that were previously challenging to interpret. Our model offers intuitive explanations for these observations and has the potential to aid identification of a broad range of sources.

Biography

2013-2017: B.S., School of Astronomy and Space Science, Nanjing University.
2017-2024: Ph.D., School of Astronomy and Space Science, Nanjing University in Astronomy.
Thesis title: Diffusion of cosmic rays around their sources (under preparation)

Chair

Gwenael Giacinti

Division

Astronomy and Astrophysics

Other information

Combined video record by Yiwei Bao & Zhuowen Zhang & Haopeng Zhang & Haojie Hu:

https://vshare.sjtu.edu.cn/open/b756cc92a402676e9b6aa4de41c9f9a0a386bd58ef030570b1d75a2a0150ee77