Oral Presentation

Characterizing Dust Extinction and Spatially Resolved Paα Emission within 97 Galaxies at 1 < z < 1.6 with JWST NIRCam Slitless Spectroscopy

Author(s): Zhaoran Liu, Tadayuki Kodama(Tohoku U), Yusei Koyama, Ichi Tanaka, Kentaro Motohara (NAOJ), JM Perez-Martinez(IAC), Masahiro Konishi, Asano Tetsuro, Hidenori Takahashi(U of Tokyo), Tomoko Suzuki(IPMU), Brian Lemaux(NOIRLab), Lori Lubin(UC Davis)

Presenter: Zhaoran Liu (Tohoku University)

We present results on Paα emitting galaxies from the JWST FRESCO survey in the GOODS fields. Using JWST NIRCam WFSS, we analyzed emission line fluxes, star formation rates, and flux distributions of 97 Paα emitters at 1 < z < 1.6. We combined Paα fluxes with archival Hα data from HST WFC3 to assess dust extinction. Our findings show a correlation between dust extinction and stellar mass, with more massive galaxies having greater extinction. Lower mass galaxies are nearly dust-free and smaller in star formation and stellar continuum, while massive galaxies show varied dust and star formation patterns, suggesting different evolutionary phases. This study highlights JWST WFSS's capabilities in studying emission line galaxies and Paα's importance in understanding dust and obscured star formation in the early universe.