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Metallicity-PAH Relation of MIR-selected Star-forming Galaxies in AKARI North Ecliptic Pole-wide Survey
Hyunjin Shim, Ho Seong Hwang, Woong-Seob Jeong +9
We investigate the variation in the mid-infrared spectral energy distributions of 373 low-redshift () star-forming galaxies, which reflects a variety of polycyclic aromatic…
Extreme nature of four blue-excess dust-obscured galaxies revealed by optical spectroscopy
Akatoki Noboriguchi, Tohru Nagao, Yoshiki Toba +13
We report optical spectroscopic observations of four blue-excess dust-obscured galaxies (BluDOGs) identified by Subaru Hyper Suprime-Cam. BluDOGs are a sub-class of dust-obscured g…
Detection of stellar light from quasar host galaxies at redshifts above 6
Xuheng Ding, Masafusa Onoue, John D. Silverman +41
The detection of starlight from the host galaxies of quasars during the reionization epoch () has been elusive, even with deep HST observations. The current highest redshift q…
Spitzer/IRS full spectral modeling to characterize mineralogical properties of silicate dust in heavily obscured AGNs
T. Tsuchikawa, H. Kaneda, S. Oyabu +3
Mid-Infrared (IR) silicate dust bands observed in heavily obscured active galactic nuclei (AGNs) include information on the mineralogical properties of silicate dust. We aim to inv…
A machine learning approach to assessing the presence of substructure in quasar host galaxies using the Hyper Suprime-Cam Subaru Strategic Program
Chris Nagele, John D. Silverman, Tilman Hartwig +4
The conditions under which galactic nuclear regions become active are largely unknown, although it has been hypothesized that secular processes related to galaxy morphology could p…
The Obscured Fraction of Quasars at Cosmic Noon
Bovornpratch Vijarnwannaluk, Masayuki Akiyama, Malte Schramm +6
Statistical studies of X-ray selected Active Galactic Nuclei (AGN) indicate that the fraction of obscured AGN increases with increasing redshift, and the results suggest that a sig…