SDSS IV MaNGA: Discovery of an $H_{\alpha }$ blob associated with a dry galaxy pair -- ejected gas or a `dark' galaxy candidate?

Lihwai Lin, Jing-Hua Lin, Chin-Hao Hsu +31

We report the discovery of a mysterious giant $H_{\alpha }$ blob that is $\sim 8$ kpc away from the main MaNGA target 1-24145, one component of a dry galaxy merger, identified in the first…