327 citations · 3.6k across the 87 of their papers we have counts for
30 papers · 1 filter
NuGrid: s process in massive stars
Raphael Hirschi, Urs Frischknecht, F. -K. Thielemann +10
The s-process production in massive stars at very low metallicities is expected to be negligible due to the low abundance of the neutron source 22Ne, to primary neutron poisons and…
High energy resolution hard X-ray and gamma-ray imagers using CdTe diode devices
Shin Watanabe, Shin-nosuke Ishikawa, Hiroyuki Aono +8
We developed CdTe double-sided strip detectors (DSDs or cross strip detectors) and evaluated their spectral and imaging performance for hard X-rays and gamma-rays. Though the doubl…
First Results from the Lick AGN Monitoring Project: The Mass of the Black Hole in Arp 151
Misty C. Bentz, Jonelle L. Walsh, Aaron J. Barth +24
We have recently completed a 64-night spectroscopic monitoring campaign at the Lick Observatory 3-m Shane telescope with the aim of measuring the masses of the black holes in 13 ne…
The s process in massive stars at low metallicity. Effect of primary N14 from fast rotating stars
M. Pignatari, R. Gallino, G. Meynet +3
The goal of this paper is to analyze the impact of a primary neutron source on the s-process nucleosynthesis in massive stars at halo metallicity. Recent stellar models including r…
The evolution of the galaxy Red Sequence in simulated clusters and groups
Alessio D. Romeo, N. R. Napolitano, G. Covone +3
N-body + hydrodynamical simulations of the formation and evolution of galaxy groups and clusters in a LambdaCDM cosmology are used in order to follow the building-up of the colour-…
Large Einstein Radii: A Problem for LambdaCDM
Tom Broadhurst, Rennan Barkana
The Einstein radius of a cluster provides a relatively model-independent measure of the mass density of a cluster within a projected radius of ~ 150 kpc, large enough to be relativ…
Broad band X-ray spectroscopy of A0535+262 with SUZAKU
S. Naik, T. Dotani, Y. Terada +9
The transient X-ray binary pulsar A0535+262 was observed with Suzaku on 2005 September 14 when the source was in the declining phase of the August-September minor outburst. The ~10…
Propagation of Ultra-high-energy Protons in Cosmic Magnetic Fields
Hajime Takami, Katsuhiko Sato, ;
We simulate the arrival distribution of ultra-high-energy (UHE) protons by following their propagation processes in several strengths of a structured extragalactic magnetic field (…
Compact starburst in the central regions of Seyfert galaxies
Kotaro Kohno, Koichiro Nakanishi, Masatoshi Imanishi
We have conducted a high-resolution ``3D'' imaging survey of the CO(1--0), HCN(1--0), and HCO(1--0) lines toward the central a few kpc regions of the Seyfert and starburst gala…
Simultaneous X-ray, radio, near-infrared, and optical monitoring of Young Stellar Objects in the Coronet cluster
J. Forbrich, Th. Preibisch, K. M. Menten +11
Multi-wavelength (X-ray to radio) monitoring of Young Stellar Objects (YSOs) can provide important information about physical processes at the stellar surface, in the stellar coron…
Where are the Cosmic Metals at z~3?
Jesper Sommer-Larsen, Johan P. U. Fynbo
The temperature distribution of the cosmic gas-phase oxygen at z~3 is determined by combining high resolution cosmological simulations with the observed, (rest-frame) V-band galaxy…
The properties of the "standard" type Ic supernova 1994I from spectral models
D. N. Sauer, P. A. Mazzali, J. Deng +3
The properties of the type Ic supernova SN 1994I are re-investigated. This object is often referred to as a "standard SN Ic" although it exhibited an extremely fast light curve and…
Large amplitude oscillation of a polar crown filament in the pre-eruption phase
Hiroaki Isobe, Durgesh Tripathi
We report observation of a large-amplitude filament oscillation followed by an eruption. This is used to probe the pre-eruption condition and the trigger mechanism of solar eruptio…
Gaseous abundances in M82
Piero Ranalli, Andrea Comastri, Livia Origlia +2
We present the preliminary analysis of a deep (100ks) XMM-Newton observation of M82. The spatial distribution of the abundances of chemical elements (Fe, O, Ne, Mg, Si, S) is inves…
New CO observations and simulations of the NGC 4438/NGC 4435 system
B. Vollmer, J Braine, F. Combes +1
NGC 4438 is a highly perturbed spiral with a stellar tidal tail and extraplanar molecular gas, now very HI deficient, crossing the center of the Virgo cluster at high speed. Variou…
The ASTRO-F Mission : Large Area Infrared Survey
Hideo Matsuhara, Hiroshi Shibai, Takashi Onaka +1
ASTRO-F is the first Japanese satellite mission dedicated for large area surveys in the infrared. The 69cm aperture telescope and scientific instruments are cooled to 6K by liquid…
Early and late time VLT spectroscopy of SN 2001el - progenitor constraints for a type Ia supernova
S. Mattila, P. Lundqvist, J. Sollerman +5
We present early time high-resolution (VLT/UVES) and late time low-resolution (VLT/FORS) optical spectra of the normal type Ia supernova, SN 2001el. The high-resolution spectra wer…
Starbursting Nuclear CO Disks of Early-type Spiral Galaxies
J. Koda, T. Okuda, K. Nakanishi +4
We have initiated the first CO interferometer survey of early-type spiral galaxies (S0-Sab). We observed five early-type spiral galaxies with HII nuclei (indicating circumnuclear s…
High velocity features in the spectra of the Type Ia SN 1999ee: a property of the explosion or evidence of circumstellar interaction?
P. A. Mazzali, S. Benetti, M. Stehle +5
The near-maximum spectra of the Type Ia SN 1999ee are reviewed. Two narrow absorption features corresponding to the strongest component of the CaII IR triplet appear in the spectra…
Galaxy Evolution in Three dimensions : Time, Space and Mass
Tadayuki Kodama, Richard Bower, Philip Best +3
There are three major axes to describe the evolution of galaxies, namely, time (redshift), space (environment) and mass (stellar mass). In this article, one topic each will be pres…
Mid- to Far-Infrared spectroscopy of Sharpless 171
Y. Okada, T. Onaka, H. Shibai +1
We have collected one-dimensional raster-scan observations of the active star-forming region Sharpless 171 (S171), a typical HII region-molecular cloud complex, with the three spec…
A deep 6.7um survey in the SSA13 field with ISO
Y. Sato, K. Kawara, L. L. Cowie +8
We present results of a deep mid-infrared survey in the SSA13 field with the Infrared Space Observatory (ISO). In order to probe the near-infrared light at high redshifts, we surve…
Variation of cosmic ray injection across supernova shocks
H. J. Voelk, E. G. Berezhko, L. T. Ksenofontov
The injection rate of suprathermal protons into the diffusive shock acceleration process should vary strongly over the surface of supernova remnant shocks. These variations and the…
Intrinsic errors of the central galactic mass derived from rotation curves under the influence of a weak non-axisymmetric potential
Jin Koda, Keiichi Wada
Rotation curves are often used to estimate the mass distribution of spiral galaxies, assuming circular rotation of disks. However, non-circular motions caused by a non-axisymmetric…