搜索结果: 1-15 共查到“知识库 星系际物质”相关记录132条 . 查询时间(6.202 秒)
隐藏的暗质量：捕获球状星团中丢失的红背蜘蛛（图）
捕获 球状星团 红背蜘蛛 暗质量
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2023/1/12
重达几百万太阳质量的球状星团蕴含了丰富的致密星，特别是少数经历过核坍缩的星团。经历过坍缩的星团核区应该富含致密双星以及可能包含了中等质量黑洞。令人疑惑的是核坍缩球状星团中所发现的射电脉冲星单星比例远超预期，也没有可信的中等质量黑洞。
Dark Matter Halos: Assembly, Clustering and Sub-halo Accretion
Dark matter Galaxy formation Halos
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2014/12/9
I carried out systematic studies on the assembly history of dark matter halos, using numerical simulations and semi-analytical methods. First, I look into dark halo mass assembly history. I confirmed ...
根据爱因斯坦广义相对论，时空弯曲，宇宙是有限的。现在已被主流物理学家普遍接受的是标准宇宙论，按标准宇宙论经过严格的数学推导，演算得到了宇宙的年龄、宇宙物质密度。作者根据广大天体物理工作者认可的观察数据和结论，通过初等数学的计算，得到的结果大相径庭。根本没天体物工作者寻找的暗物质。
星系中的HI空洞及其形成机制
星际介质 HI壳层 HI空洞 形成机制
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2012/9/12
旋涡星系和不规则星系中存在众多的H工空洞已是不争的事实，它们形态各异、大小不一、物理特征差别明显。人们不仅对若干近距星系中的H工空洞做了较为细致的观测研究，而且随着观测资料的积累，相关统计研究亦渐趋深入。迄今已就H工空洞的形成机制提出了多种理论模型，但对这一问题的认识尚未完全取得一致。
Time dependent embedding of spherically symmetric Rindler spacetime
anisotropic cosmic fluid MS energy curved Rindler ric heat flux
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2012/2/21
An anisotropic cosmic fluid with radial heat flux which sources a time dependent Rindler geometry is investigated. Even though its energy density $\rho$ is positive, the radial and transversal pressur...
The effect of feedback on the emission properties of the Warm-Hot Intergalactic Medium
feedback emission properties the Warm-Hot Intergalactic Medium
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2012/2/21
At present, 30-40 per cent of the baryons in the local Universe is still undetected. According to theoretical predictions, this gas should reside in filaments filling the large-scale structure (LSS) i...
Ultra deep sub-kpc view of nearby massive compact galaxies
Gemini North telescope Ultra deep sub-kpc view massive compact galaxies
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2012/2/21
Using Gemini North telescope ultra deep and high resolution (sub-kpc) K-band adaptive optics imaging of a sample of 4 nearby (z~0.15) massive (~10^{11}M_{sun}) compact (R<1.5 kpc) galaxies, we have ex...
An Anomaly in the Angular Distribution of Quasar Magnitudes: Evidence for a Bubble Universe with a Mass ~10^21 M\odot
Anomaly Angular Distribution Quasar Magnitudes Bubble Universe Mass
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2012/2/21
Quasars provide our farthest-reaching view of the Universe. The Sloan Survey now contains over 100,000 quasar candidates. A careful look at the angular distribution of quasar magnitudes shows a surpri...
Faint Extended OH Emission from the Local Interstellar Medium in the Direction l \approx 108\circ, b \approx 5\circ
OH Emission Local Interstellar Medium Cosmology and Extragalactic Astrophysics
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2012/2/21
We have mapped faint 1667 OH line emission (TA \approx 20 - 40 mK in our \approx 30' beam) along many lines of sight in the Galaxy covering an area of \approx 4\circ \times 4\circ in the general direc...
Environmental Effects on the Metal Enrichment of Low Mass Galaxies in Nearby Clusters
Environmental Effects the Metal Enrichment Low Mass Galaxies Nearby Clusters
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2012/2/21
In this paper we study the chemical history of low-mass star-forming (SF) galaxies in the local Universe clusters Coma, A1367, A779, and A634. The aim of this work is to search for the imprint of the ...
Constraining dynamical dark energy with a divergence-free parametrization in the presence of spatial curvature and massive neutrinos
Constraining dynamical dark energy divergence-free parametrization presence spatial curvature massive neutrinos
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2012/2/21
In this paper, we report the results of constraining the dynamical dark energy with a divergence-free parameterization, $w(z) = w_{0} + w_{a}(\frac{\ln(2+z)}{1+z}-\ln2)$, in the presence of spatial cu...
用现实生活现象来导出这个世界的一条普遍原理——物质原理，物质原理是浮力，涡流力（引力）以及其它许多生活现象的共同原理。我们通常认为布朗运动是概率运动，是随机运动。其实不是这样的，这个世界一切都有注定，一切都有因果。
Merger induced scatter and bias in the cluster mass - Sunyaev-Zeldovich effect scaling relation
cosmology: large-scale structure of Universe, galaxies: clusters: general, meth- ods: N-body simulations
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2011/10/20
We examine sources of scatter in scaling relations between galaxy cluster mass and thermal Sunyaev-Zeldovich (SZ) effect using cluster samples extracted from cosmological hydrodynamical simulations. O...
Spatially-Resolved Spectroscopy of SDSS J0952+2552: a Confirmed Dual AGN
Spectroscopy SDSS J0952+2552: Confirmed Dual AGN
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2011/10/9
Most massive galaxies contain supermassive black holes (SMBHs) in their cores. When galaxies merge, gas is driven to nuclear regions and can accrete onto the central black hole. Thus one expects to se...
Precision Spectrophotometry at the Level of 0.1%
Precision Spectrophotometry Level
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2011/10/19
Accurate relative spectrophotometry is critical for many science applications. Small wavelength scale residuals in the flux calibration can significantly impact the measurements of weak emission and a...