SN2017egm: A Helium-rich Superluminous Supernova with Multiple Bumps in the Light Curves

Jiazheng Zhu, Ning Jiang, Subo Dong +28

When discovered, SN~2017egm was the closest (redshift $z=0.03$) hydrogen-poor superluminous supernova (SLSN-I) and a rare case that exploded in a massive and metal-rich galaxy. Thu…