Mapping dusty galaxy growth at $z>5$ with FRESCO: Detection of H$\alpha$ in submm galaxy HDF850.1 and the surrounding overdense structures

Thomas Herard-Demanche, Rychard J. Bouwens, Pascal A. Oesch +21

We report the detection of a 13$\sigma$ H$\alpha$ emission line from HDF850.1 at $z=5.188\pm 0.001$ using the FRESCO NIRCam F444W grism observations. Detection of H$\alpha$ in HDF850.1 is notewort…