81 citations · 118 across the 7 of their papers we have counts for
7 papers
Anomalous Hydrogen Recombination-Line Ratios in Ultraluminous Infrared Galaxies
Kenichi Yano, Shunsuke Baba, Takao Nakagawa +5
We conducted systematic observations of the H I Br (4.05 m) and Br (2.63 m) lines in 52 nearby () ultraluminous infrared galaxies (ULIRGs) with AKARI. Among 33 U…
A systematic study of ULIRGs using near-infrared absorption bands reveals a strong UV environment in their star-forming regions
Ryosuke Doi, Takao Nakagawa, Naoki Isobe +3
We present a systematic study of the 3.0 um H2O ice and the 3.4 um aliphatic carbon absorption features toward 48 local ultraluminous infrared galaxies (ULIRGs) using spectra obtai…
Relation between polycyclic aromatic hydrocarbon, Br and infrared luminosity of local galaxies observed with AKARI
Kazumi Murata, Takao Nakagawa, Hideo Matsuhara +1
We produce a catalogue of polycyclic aromatic hydrocarbon (PAH) 3.3 m, Br and infrared luminosity ((IR)) of 412 local galaxies, and investigate a relation between these ph…
Star Formation in Ultraluminous Infrared Galaxies Probed with AKARI Near-Infrared Spectroscopy
Kenichi Yano, Takao Nakagawa, Naoki Isobe +1
We conducted systematic observations of the HI Br-alpha line (4.05 micron) and the polycyclic aromatic hydrocarbon (PAH) feature (3.3 micron) in 50 nearby (z<0.3) ultraluminous inf…
X-ray and infrared diagnostics of nearby active galactic nuclei with MAXI and AKARI
Naoki Isobe, Taiki Kawamuro, Shinki Oyabu +5
Nearby active galactic nuclei were diagnosed in the X-ray and mid-to-far infrared wavelengths, with Monitor of All-sky X-ray Image (MAXI) and the Japanese infrared observatory AKAR…
Revised Wavelength and Spectral Response Calibrations for AKARI Near-Infrared Grism Spectroscopy: Cryogenic Phase
S. Baba, T. Nakagawa, M. Shirahata +6
We perform revised spectral calibrations for the AKARI near-infrared grism to quantitatively correct for the effect of the wavelength-dependent refractive index. The near-infrared…
Luminosity and Redshift Dependence of the Covering Factor of AGNs viewed with WISE and SDSS
Yoshiki Toba, Shinki Oyabu, Hideo Matsuhara +10
In this work, we investigate the dependence of the covering factor (CF) of active galactic nuclei (AGNs) (i) on the mid-infrared (MIR) luminosity and (ii) on the redshift. We const…