803 citations · 1.4k across the 13 of their papers we have counts for
13 papers
Near-infrared spectroscopy of nearby Seyfert galaxies: Is there evidence for the shock excitation in narrow-line regions?
Koki Terao, Tohru Nagao, Tetsuya Hashimoto +5
One of the unsettled, important problems in active galactic nuclei (AGNs) is the major ionization mechanism of gas clouds in their narrow-line regions (NLRs). In order to investiga…
The First Release COSMOS Optical and Near-IR Data and Catalog
P. Capak, H. Aussel, M. Ajiki +54
We present imaging data and photometry for the COSMOS survey in 15 photometric bands between 0.3um and 2.4um. These include data taken on the Subaru 8.3m telescope, the KPNO and CT…
Mass Segregation in Star Clusters: Analytic Estimation of the Timescale
H. Mouri, Y. Taniguchi
Mass segregation in a star cluster is studied in an analytical manner. We consider a two-component cluster, which consists of two types of stars with different masses. Plummer's mo…
Gas Metallicity of Narrow-Line Regions in Narrow-Line Seyfert 1 Galaxies and Broad-Line Seyfert 1 Galaxies
Tohru Nagao, Takashi Murayama, Yasuhiro Shioya +1
We investigate gas metallicity of narrow-line regions in narrow-line Seyfert 1 galaxies (NLS1s) and broad-line ones (BLS1s) in order to examine whether or not there is a difference…
Subaru Deep Survey II. Luminosity Functions and Clustering Properties of Lya Emitters at z=4.86 in the Subaru Deep Field
M. Ouchi, K. Shimasaku, H. Furusawa +17
We report on early results from deep and wide-field narrow-band imaging on a 543 arcmin^2 area of the Subaru Deep Field. We find 87 Lya emitters (LAEs) at z=4.86(+/-0.03) which are…
A Multi-band Photometric Study of Tidal Debris in A Compact Group of Galaxies: Seyfert's Sextet
S. Nishiura, Y. Shioya, T. Murayama +4
In order to investigate the properties of the prominent tidal debris feature extending to the northeast of the compact group of galaxies Seyfert's Sextet, we analyzed multi-band (U…
Runaway Merging of Black Holes: Analytical Constraint on the Timescale
H. Mouri, Y. Taniguchi
Following the discovery of a black hole (BH) with a mass of 10^3-10^6 M(sun) in a starburst galaxy M82, we study formation of such a BH via successive merging of stellar-mass BHs w…
Is There an Advection-Dominated Accretion Flow in Radio Galaxies with Double-Peaked Balmer Lines?
Tohru Nagao, Takashi Murayama, Yasuhiro Shioya +1
In order to examine the prediction that the broad-line radio galaxies (BLRGs) with double-peaked Balmer lines harbor an accretion disk characterized by an advection-dominated accre…
Nuclear obscuration in the high-ionization Seyfert 2 galaxy Tol 0109-383
K. Iwasawa, G. Matt, A. C. Fabian +5
We report the BeppoSAX detection of a hard X-ray excess in the X-ray spectrum of the classical high-ionization Seyfert 2 galaxy Tol0109-383. The X-ray emission of this source obser…
The Narrow-Line Region of Seyfert Galaxies: Narrow-Line Seyfert 1 Galaxies versus Broad-Line Seyfert 1 Galaxies
T. Nagao, T. Murayama, Y. Taniguchi
It is known that the spectral energy distribution (SED) of the nuclear radiation of narrow-line Seyfert 1 galaxies (NLS1s) has different shapes with respect to that of ordinary bro…
How Do We See the Nuclear Region (r < 0.1 pc) of Narrow-Line Seyfert 1 Galaxies?
T. Murayama, T. Nagao, Y. Taniguchi
We propose two statistical tests to investigate how we see the nuclear region (r < 0.1 pc) of Narrow-Line Seyfert 1 galaxies (NLS1s). 1) The high-ionization nuclear emission-line r…
Erratum: Excitation Mechanism of Near-Infrared [Fe II] Emission in Seyfert and Starburst Galaxies (ApJ, 528, 186 [2000])
H. Mouri, K. Kawara, Y. Taniguchi
In the paper "Excitation Mechanism of Near-Infrared [Fe II] Emission in Seyfert and Starburst Galaxies" by Hideaki Mouri, Kimiaki Kawara, and Yoshiaki Taniguchi (ApJ, 528, 186 [200…
Depression in Luminous Starburst Mergers
Yoshiaki Taniguchi, Youichi Ohyama
It is known that the class of luminous starburst galaxies tends to have higher integrated line intensity ratios () than normal spiral gal…