Chandra Uncovers a Hidden Low-Luminosity Active Galactic Nucleus in the Radio Galaxy Hydra A (3C 218) [0.03%]
钱德拉发现 radio 星系 Hydra A（3C 218）中隐藏着一个低光度活动星系核
RM Sambruna,G Chartas,M Eracleous et al.
RM Sambruna et al.
We report the detection with Chandra of a low-luminosity active galactic nucleus (LLAGN) in the low-ionization nuclear emission-line region (LINER) hosted by Hydra A, a nearby (z=0.0537) powerful FR I radio galaxy with complex radio and opt...
JD Barrow,J Magueijo
JD Barrow
We show that the supernovae results, which imply that there is evidence for an accelerating universe, may be closely related to the recent discovery of redshift dependence in the fine-structure constant alpha. The link is a class of varying...
First Results from Viper: Detection of Small-scale Anisotropy at 40 GHz [0.03%]
Viper初步结果：40GHz的小尺度各向异性检测
JB Peterson,GS Griffin,MG Newcomb et al.
JB Peterson et al.
Results of a search for small-scale anisotropy in the cosmic microwave background (CMB) are presented. Observations were made at the South Pole using the Viper telescope, with a 0&fdg;26 (FWHM) beam and a passband centered at 40 GHz. Anisot...
Interplanetary Magnetic Field Line Mixing Deduced from Impulsive Solar Flare Particles [0.03%]
从冲动太阳耀斑粒子探测到的星际磁场线路混合现象
JE Mazur,GM Mason,JR Dwyer et al.
JE Mazur et al.
We have studied fine-scale temporal variations in the arrival profiles of approximately 20 keV nucleon-1 to approximately 2 MeV nucleon-1 ions from impulsive solar flares using instrumentation on board the Advanced Composition Explorer spac...
Small-scale Gradients and Large-scale Diffusion of Charged Particles in the Heliospheric Magnetic Field [0.03%]
heliospheric磁场中带电粒子的小尺度梯度和大尺度扩散
J Giacalone,JR Jokipii,JE Mazur
J Giacalone
We have carried out numerical simulations of the propagation of energetic charged particles in a turbulent magnetic field similar to that observed in the solar wind. If the particles are released impulsively near the Sun, in a region small ...
Reconciling Spectroscopic Electron Temperature Measurements in the Solar Corona with In Situ Charge State Observations [0.03%]
调和日冕光谱电子温度测量与就位电荷态观测的结果
R Esser,RJ Edgar
R Esser
It has been a puzzle for quite some time that spectroscopic measurements in the inner corona indicate electron temperatures far too low to produce the ion fractions observed in situ in the solar wind. In the present Letter, we show that in ...
Global Simulations of Differentially Rotating Magnetized Disks: Formation of Low-beta Filaments and Structured Coronae [0.03%]
差异旋转磁场盘的全球模拟：低β细丝和结构化日冕的形成
M Machida,MR Hayashi,R Matsumoto
M Machida
We present the results of three-dimensional global magnetohydrodynamic simulations of the Parker-shearing instability in a differentially rotating torus initially threaded by toroidal magnetic fields. An equilibrium model of a magnetized to...
MV Medvedev
MV Medvedev
We demonstrate that the measurement of fluctuations of polarization due to the Galactic interstellar scintillations may be used to study the structure of the radiation field at compact radio sources. We develop a mathematical formalism and ...
Equilibrium Chemistry in a Brown Dwarf's Atmosphere: Cesium in Gliese 229B [0.03%]
Gliese 229B大气中的化学平衡：铯元素
CA Griffith,RV Yelle
CA Griffith
The distribution of Cs in Gliese 229B's atmosphere reveals how equilibrium chemistry establishes the atmospheric composition. The rapid kinetics of cesium chemistry keeps the Cs abundance in thermochemical equilibrium and renders Cs a sensi...
The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458 [0.03%]
光谱法测定凌日系外行星HD 209458b的轨道参数
T Mazeh,D Naef,G Torres et al.
T Mazeh et al.
We report a spectroscopic orbit with period P=3.52433+/-0.00027 days for the planetary companion that transits the solar-type star HD 209458. For the metallicity, mass, and radius of the star, we derive [Fe/H&sqbr0;=0.00+/-0.02, M*=1.1+/-0....