搜索结果: 1-15 共查到“知识库 理论天体物理学”相关记录624条 . 查询时间(4.407 秒)
Holographic Dark Energy Characterized by the Total Comoving Horizon and Insights to Cosmological Constant and Coincidence Problem
Holographic Dark Energy the Total Comoving Horizon Insights Cosmological Constant Coincidence Problem
2012/2/21
The observed acceleration of the present universe is shown to be well explained by the holographic dark energy characterized by the total comoving horizon of the universe ($\eta$HDE). It is of interes...
Axino dark matter and baryon number asymmetry from Q-ball decay in gauge mediation
Axino dark matter baryon number asymmetry Q-ball decay gauge mediation
2012/2/21
We investigate the Q-ball decay into the axino dark matter in the gauge-mediated supersymmetry breaking. In our scenario, the Q ball decays mainly into nucleons and partially into axinos to account fo...
Brightness and Fluctuation of the Mid-Infrared Sky from AKARI Observations towards the North Ecliptic Pole
Brightness Fluctuation Mid-Infrared Sky AKARI Observations the North Ecliptic Pole
2012/2/21
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...
Prospects for early localization of gravitational-wave signals from compact binary coalescences with advanced detectors
Prospects early localization gravitational-wave signals compact binary coalescences advanced detectors
2012/2/21
A leading candidate source of detectable gravitational waves is the inspiral and merger of pairs of stellar-mass compact objects. The advanced LIGO and advanced Virgo detectors will allow scientists t...
星球的存在是由两种简单的冷热物质力量的对抗作用为基础，表现为物质层次旋进包压的形式。冷热物质力量的对抗是星球本身的自转和星球之间的公转原动力，也是星球从产生、发展到消亡过程演变的根源。
A seesaw mechanism in an extra-dimension, known as the split seesaw mechanism, provides a natural way to realize a splitting mass spectrum of right-handed neutrinos. It leads to one keV sterile neutri...
光在稀薄电离气体中传播时的红移效应
宇宙学 红移 软光子 电离气体
2011/9/25
广阔的宇宙空间并不是真正的真空。实际上不同区域存在有密度不同的极其稀薄的电离气体。光量子在这样的空间中传播时存在有一种‘软光子发射过程’。本文对这一‘软光子发射过程’进行讨论。由于这个软光子发射过程的存在，光量子在这样的空间中传播过程中要产生红移。计算这一红移的公式在文中也已导出。利用这个红移，许多已观测到而无法解释的天文现象可以很好地加以解释。
We examine the existence of relativistic stars in f(T) modified gravity and explicitly construct several classes of static perfect fluid solutions. We derive the conservation equation from the complet...
Model-Independent Comparisons of Pulsar Timings to Scalar-Tensor Gravity
General Relativity Gravity Gravitation Scalar-Tensor Tensor-Scalar Neutron Stars Pulsars Binary Pulsars Double Pulsar
2011/10/14
Observations of pulsar timing provide strong constraints on scalar-tensor theories of gravity, but these constraints are traditionally quoted as limits on the microscopic parameters (like the Brans-Di...
We present new spectropolarimetric observations of the normal A-type star Vega, obtained during the summer of 2010 with NARVAL at T\'elescope Bernard Lyot (Pic du Midi Observatory). This new time-seri...
Effective temperature for black holes
Black hole entropy Hawking radiation eff ective temperature
2011/10/14
The physical interpretation of black hole's quasinormal modes is fundamental for realizing unitary quantum gravity theory as black holes are considered theoretical laboratories for testing models of s...
Classifying structures in the ISM with Support Vector Machines: the G16.05-0.57 supernova remnant
Classifying structures Support Vector Machines supernova remnant
2011/10/20
We apply Support Vector Machines -- a machine learning algorithm -- to the task of classifying structures in the Interstellar Medium. As a case study, we present a position-position velocity data cube...
The peculiar properties of horizontal branch stars in omega Centauri
peculiar properties horizontal branch stars omega Centauri
2011/10/20
We measured temperatures, gravities, and masses for a large sample of blue horizontal branch stars in omega Centauri, comparing the results with theoretical expectations for canonical and He-enriched ...
Understanding Compact Object Formation and Natal Kicks. III. The case of Cygnus X-1
Understanding Compact Object Formation Natal Kicks Cygnus X-1
2011/10/20
In recent years, accurate observational constraints become available for an increasing number of Galactic X-ray binaries. Together with proper motion measurements, we could reconstruct the full evolut...
Strong Electroweak Phase Transitions in the Standard Model with a Singlet
Strong Electroweak Phase Transitions Standard Model Singlet
2011/10/14
It is well known that the electroweak phase transition (EWPhT) in extensions of the Standard Model with one real scalar singlet can be first-order for realistic values of the Higgs mass. We revisit th...