Poster Presentation

Physical Properties of Broad-Line AGNs in the PFS-SSP Galaxy Evolution Survey: Initial Results from S25A Observations

Author(s): Keiya Takeshita (Ritstumeikan University), Yoshiki Toba (Ritstumeikan University), Yoshiki Matsuoka (Ehime University), Ayumi Takahashi (Kanagawa University), Kohei Ichikawa (Tohoku University), Tohru Nagao (Ehime University), Hiroyuki Ikeda (Fukui University of Technology), Jialai Wang (University of Science and Technology of China), Alberto Rodríguez Ardila (Observatório Nacional), Thaisa Storchi Bergmann (UFRGS)

Presenter: Keiya Takeshita (Ritsumeikan University)

Understanding the growth history of Supermassive Black Holes (SMBHs) is a central topic in galaxy evolution. While previous large-scale surveys, such as the SDSS, have provided massive quasar catalogs, the AGN sample may be biased toward the luminous population because of its relatively shallow depth. Consequently, the demographics of fainter AGNs remain unexplored. To address this, we utilized early data from the PFS-SSP, which enables deep spectroscopy of large samples. In this study, we focused on the Galaxy Evolution (GE) survey component from the S25A observing runs (runs 21-23). From a parent sample of 942 observed AGN candidates, we visually identified 96 Broad-Line AGNs. We performed spectral fitting using pyQSOFit to derive the virial black hole masses (M_BH) and Eddington ratios (lambda_Edd). The derived physical properties are in the ranges of 7 < log(M_BH/M_sun) < 10 and 0.001 < lambda_Edd < 10. These distributions are broadly consistent with the SDSS quasar population at similar luminosity levels. This consistency validates the high data quality of the PFS early science runs and the reliability of our analysis. Future analyses with the complete PFS survey will extend these studies to the fainter AGN population that was previously inaccessible.