搜索结果: 61-75 共查到“等离子体天体物理学”相关记录323条 . 查询时间(1.765 秒)
A Generalized Flux Function for Three-dimensional Magnetic Reconnection
Generalized Flux Function Three-dimensional Magnetic Reconnection
2011/10/18
The definition and measurement of magnetic reconnection in three-dimensional magnetic fields with multiple reconnection sites is a challenging problem, particularly in fields lacking null points. We p...
由中国科学院紫金山天文台主办、中国科学院紫金山天文台和洛阳师范学院联合承办的“日地活动现象中基本等离子体过程”学术研讨会于2011年6月21-24日在河南洛阳举办。来自美国马里兰大学、加州大学、奥本大学、台湾中央大学、中国科学技术大学、北京大学、南京大学、浙江大学、山东大学、以及中国科学院等单位的四十余名海内外专家、学者参加了会议。
Confronting 2D delayed-detonation models with light curves and spectra of Type Ia supernovae
supernovae general
2011/8/24
We compare models for Type Ia supernova (SN Ia) light curves and spectra with an extensive set of observations. The models come from a recent survey of 44 two-dimensional delayed-detonation models com...
Subaru weak-lensing study of A2163: bimodal mass structure
Subaru weak-lensing study A2163 bimodal mass structure
2011/8/24
We present a weak-lensing analysis of the merging cluster A2163 using Subaru/Suprime-Cam and CHFT/Mega-Cam data and discuss the dynamics of this cluster merger, based on complementary weak-lensing, X-...
天鹅座X-1黑洞周围存在偏振光线（图）
天鹅座X-1黑洞周围存在偏振光线
2011/3/29
据美国太空网报道，目前，天文学家发现天鹅座X-1黑洞附近存在偏振光线，从而揭示该黑洞周围存在着扭曲空间和超强烈磁场。天鹅座X-1黑洞是一个著名的黑洞，它是天文学家发现的第一个黑洞天体，其质量大约是太阳的10倍，直径约60公里(36英里)，距离地球8000光年，位于天鹅星座。
天文学家揭开太阳活动谷延迟之谜（图）
天文学家 太阳活动谷 延迟之谜 姆诺兹-贾拉米洛
2011/3/25
近来，由于太阳表面开始频繁地出现太阳耀斑并向外“吹”出太阳风，因此它再次成为人们关注的焦点。然而，对科学家而言，更加有意义的是太阳此次频繁活动前，它处于活动低谷状态的时间之长超出了人们的意料。
Nonlinear Dynamical Friction of a Circular-Orbit Perturber in a Gaseous Medium
Galaxy Astrophysics (astro-ph.GA)
2010/12/28
We use three-dimensional hydrodynamic simulations to investigate the nonlinear gravitational responses of gas to, and the resulting drag forces on, very massive perturbers moving on circular orbits.
The Compton shoulder of the Fe Kalpha fluorescent emission line in active galactic nuclei
The Compton shoulder the Fe Kalpha fluorescent emission line
2011/1/11
We present new, high signal-to-noise ratio results from a Monte Carlo study of the properties of the Compton shoulder of the Fe Kalpha emission line in the toroidal X-ray reprocessor model of Murphy &...
The Voronoi Tessellation cluster finder in 2+1 dimensions
Cosmology observations – Galaxies: clusters general – Methods data analysis
2010/11/16
We present a detailed description of the Voronoi Tessellation (VT) cluster finder algorithm in 2+1 dimensions, which improves on past implementations of this technique. The need for cluster finder alg...
Extrapolating the Evolution of Galaxy Sizes to the Epoch of Reionization
galaxies evolution formation high-redshift cosmology theory
2010/11/16
We use data on the high-redshift evolution of the size distribution and luminosity function of galaxies to constrain the relationship between their star formation eciency and starburst lifetime. Base...
The orientation of the nuclear obscurer of the AGNs
galaxies statistics — galaxies Seyfert — galaxies nuclei — galaxies spiral
2010/11/15
We examine the distribution of axis ratios of a large sample of disk galaxies hosting type 2 AGNs selected from the Sloan Digital Sky Survey and compare it with a well-defined control sample of non-ac...
The central slope of dark matter cores in dwarf galaxies: Simulations vs. THINGS
Galaxies dark matter halos – galaxies cosmological N-body+SPH simulations –galaxies kinematics and dynamics
2010/11/15
We make a direct comparison of the derived dark matter (DM) distributions between hydrody-
namical simulations of dwarf galaxies assuming a CDM cosmology and the observed dwarf galaxies sample from ...
Accretion-regulated star formation in late-type galaxies
Accretion-regulated star late-type galaxies
2010/11/15
We develop a four-phase galaxy evolution model in order to study the effect of accretion of extra-galactic gas on the star formation rate (SFR) of a galaxy. Pure self-regulated star formation of isola...
The Birth of a Galaxy: Primordial Metal Enrichment and Population II Stellar Populations
cosmology methods numerical hydrodynamics radiative transfer star formation
2010/11/15
Population III stars first form in dark matter halos with masses around 106M⊙. By definition,
they are metal-free, and their protostellar collapse is driven by molecular hydrogen cooling in the gas-p...