Search Publications
Intrinsic Shape of Star-forming BzK Galaxies. II. Rest-frame Ultraviolet and Optical Structures in GOODS-South and SXDS
Ohta, Kouji; Yabe, Kiyoto; Yuma, Suraphong
We study the statistical intrinsic shape of star-forming BzK galaxies (sBzK galaxies) at z ~ 2 in both rest-frame UV and rest-frame optical wavelengths. The sBzK galaxies are selected down to KAB = 24.0 mag in the GOODS-S and Subaru-XMM Deep Survey (SXDS) fields, where high-resolution images from the Hubble Space Telescope are publicly …
First Study of Dark Matter Properties with Detected Solar Gravity Modes and Neutrinos
García, R. A.; Mathur, S.; Lopes, I. +5 more
We derive new limits on the cold dark matter properties for weakly interacting massive particles (WIMPs), potentially trapped in the solar core by using for the first time the central temperature constrained by boron neutrinos and the central density constrained by the dipolar gravity modes detected with the Global Oscillations at Low Frequency/So…
WISE/NEOWISE Preliminary Analysis and Highlights of the 67p/Churyumov-Gerasimenko near Nucleus Environs
Masiero, Joseph R.; Wright, Edward L.; Tholen, David J. +15 more
On 2010 January 18-19 and June 28-29, the Wide-field Infrared Survey Explorer (WISE) spacecraft imaged the Rosetta mission target, comet 67P/Churyumov-Gerasimenko. We present a preliminary analysis of the images, which provide a characterization of the dust environment at heliocentric distances similar to those planned for the initial spacecraft e…
Optical and Infrared Analysis of Type II SN 2006bc
Barlow, M. J.; Clayton, Geoffrey C.; Meixner, M. +8 more
We present nebular phase optical imaging and spectroscopy and near/mid-IR imaging of the Type II SN 2006bc. Observations reveal the central wavelength of the symmetric Hα line profile to be redshifted with respect to the host galaxy Hα emission by day 325. Such a phenomenon has been argued to result from an asymmetric explosion in the iron-peak el…
Brightness and Fluctuation of the Mid-infrared Sky from AKARI Observations toward the North Ecliptic Pole
Jeong, Woong-Seob; Matsuura, Shuji; Matsumoto, Toshio +1 more
We present the smoothness of the mid-infrared sky from observations by the Japanese infrared astronomical satellite AKARI. AKARI monitored the north ecliptic pole (NEP) during its cold phase with nine wave bands covering from 2.4 to 24 µm, out of which six mid-infrared bands were used in this study. We applied power-spectrum analysis to the …
Extended Magnetospheres in Pre-main-sequence Evolution: From T Tauri Stars to the Brown Dwarf Limit
Gómez de Castro, Ana I.; Marcos-Arenal, Pablo
Low-mass pre-main-sequence stars, i.e., T Tauri stars (TTSs), strongly radiate at high energies, from X-rays to the ultraviolet (UV). This excess radiation with respect to main-sequence cool stars (MSCSs) is associated with the accretion process, i.e., it is produced in the extended magnetospheres, in the accretion shocks on the stellar surface, a…
A New Microlensing Event in the Doubly Imaged Quasar Q 0957+561
Kochanek, C. S.; Harris, Hugh C.; Fadely, Ross +6 more
We present evidence for ultraviolet/optical microlensing in the gravitationally lensed quasar Q 0957+561. We combine new measurements from our optical monitoring campaign at the United States Naval Observatory, Flagstaff, with measurements from the literature and find that the time-delay-corrected r-band flux ratio mA - mB ha…
Numerical Simulation of Three-dimensional Asymmetric Reconnection and Application to a Physical Mechanism of Penumbral Microjets
Shibata, Kazunari; Isobe, Hiroaki; Nakamura, Naoki
Three-dimensional (3D) component reconnection, where reconnecting field lines are not perfectly anti-parallel, is studied with a 3D magnetohydrodynamic simulation. In particular, we consider the asymmetry of the field strength of the reconnecting field lines. As the asymmetry increases, the generated reconnection jet tends to be parallel to strong…
An Over-and-out Halo Coronal Mass Ejection Driven by the Full Eruption of a Kinked Filament
Yang, Bo; Yang, Jiayan; Bi, Yi +5 more
Over-and-out coronal mass ejections (CMEs) represent a broad class of CMEs that come from flare-producing magnetic explosions of various sizes but are laterally far offset from the flare, and their productions can be depicted by the magnetic-arch-blowout scenario. In this paper, we present observations of an over-and-out halo CME from the full eru…
The Ultraviolet Spectral Energy Distributions of Quiescent Black Holes and Neutron Stars
Robinson, E. L.; Hynes, R. I.
We present Hubble Space Telescope/Advanced Camera for Surveys ultraviolet photometry of three quiescent black hole X-ray transients, X-ray Nova Muscae 1991 (GU Mus), GRO J0422+32 (V518 Per), and X-ray Nova Vel 1993 (MM Vel), and one neutron star system, Aql X-1. These are the first quiescent UV detections of these objects. All are detected at a mu…