Oral Presentation

Multi-emission-line study on Hα emitters at z∼2.3 from broad-band excesses

Author(s): Nuo Chen (Univ. of Tokyo), Kentaro Motohara (NAOJ), Lee Spitler (Macquarie University), Masahiro Konishi (Univ. of Tokyo), Hidenori Takahashi (Univ. of Tokyo), Kosuke Kushibiki (Univ. of Tokyo), Shogo Homan (Univ. of Tokyo)

Presenter: Nuo Chen (The University of Toyko)

In this study, we present the selection and physical properties of Hα emission line galaxies (HAEs) at 2.05 < z < 2.5 in three ZFOURGE field. The sample is selected from the flux excess in the observed Ks broad band flux relative to the best-fit stellar continuum. Thanks to to the deep medium J/H-band image from the ZFOURGE survey, [OIII] and [OII] emission lines fluxes could be simutaneously obtained from our method. There is a very good agreement between our lines flux and the MOSDEF spectroscopy catalog. Through this method, a large number of low-mass starburst galaxies with stellar mass <10^9 M_sol are found, which have not been detailed studied before. We futher study the metallicities, ionization states of these galaxies based on the strong emission ratio. These systems offer unique laboratories to understand the galaxy formation and evolution duringthe Cosmic Noon.