Speaker
Xiao-Lei Guo
(Southwest Jiaotong University)
Description
The Circinus galaxy is a nearby composite starburst/active galactic nucleus (AGN) system. In this work we re-analyze the GeV emission from Circinus with 10 years of Fermi-LAT data. Our 0.1–500 GeV flux is several times lower than that reported in previous literature, which is roughly in compliance with the empirical relation for star-forming and Local Group galaxies and might be reproduced by the interaction between cosmic rays and the interstellar medium. The ratio between the γ-ray luminosity and the total infrared luminosity is near the proton calorimetric limit, indicating that Circinus may be a proton calorimeter.
| Subcategory | Experimental Results |
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Primary authors
Xiao-Lei Guo
(Southwest Jiaotong University)
Dr
Yu-Liang Xin
(Southwest Jiaotong University)
Dr
Neng-Hui Liao
Prof.
Yi-Zhong Fan
