Assistant Professor Hiroki Yoneda (15th batch・Graduate school of Science) et al. published a paper online (Astronomy and Astrophysics)

【Authors】Hiroki Yoneda, Thomas Siegert and Saurabh Mittal

【Title】Imaging the positron annihilation line with 20 years of INTEGRAL/SPI observations

【Journal】Astronomy and Astrophysics

【Publication Date】24 October 2025

【Volume】702

【Article Number】A220

【Number of page(s)】18

【DOI】https://doi.org/10.1051/0004-6361/202555895