Oral Presentation

Search for extreme emission line galaxies at 1

Author(s): Seiya Imai, Masayuki Tanaka, Yusei Koyama, Kiyoto Yabe, Masato Onodera, Makoto Ando(NAOJ), Kei Ito(Univ. of Tokyo)

Presenter: Seiya Imai (SOKENDAI/NAOJ)

Revealing the nature of low-mass galaxies with strong emission lines is of importance to understand the early stage of galaxy formation and evolution. These galaxies often exhibit a strong [OIII]λ5007Å emission line and referred to as extreme emission line galaxies (EELGs). Recent JWST observations reveal that EELGs are common at z > 6, but Lower redshift EELGs at 0 < z < 3 are useful objects to study their properties in greater detail. EELGs in the local universe are first identified as green peas, and they have been examined extensively to date. However, our understanding of intermediate redshift EELGs at 1 < z < 3 is very limited. Galaxies with strong [OIII] 5007 equivalent widths are extremely rare, and understanding their evolution requires a large sample size.　We here investigate statistical properties of EELGs(EW([OIII]5007)>1000Å) at 11000Å) from a small patch of the data matching spec-z catalog. We first identify candidates using color-color diagrams. We then carry out detailed SED fitting using the u2K catalog to infer their redshifts, stellar-mass, and star formation rates. In this talk, we will report these physical properties of EELGs and discuss their evolution around cosmic noon.