搜索结果: 1-15 共查到“知识库 恒星与银河系其他学科”相关记录34条 . 查询时间(2.266 秒)
Perturbed stellar motions around the rotating black hole in Sgr A* for a generic orientation of its spin axis
Perturbed stellar motions rotating black hole generic orientation spin axis
2011/10/17
Empirically determining the averaged variations of the orbital parameters of the stars orbiting the Supermassive Black Hole (SBH) hosted by the Galactic Centre (GC) in Sgr A* is, in principle, a valua...
A basic property of objects, like galaxies and halos that form in cosmological structure formation simulations, is their shape. Here, we critically investigate shape determination methods that are com...
Too small to succeed? Lighting up massive dark matter subhaloes of the Milky Way
methods: numerical - N-body simulations – galaxies: formation - haloes - Local Group
2011/10/19
Using Constrained Local UniversE Simulations (CLUES) of the formation of the Local Group in a cosmological context we investigate the recently highlighted problem that the majority of the most massive...
Considerations on the accretion of Uranus and Neptune by mutual collisions of planetary embryos in the vicinity of Jupiter and Saturn
planetary systems – planets and satellites: formation – planets and satellites: individual: Uranus, Neptune – protoplanetary disks
2011/10/8
Modeling the formation of Uranus and Neptune is a long-lasting problem in planetary science. Due to the gas-drag, collisional damping, and resonant shepherding, the planetary embryos repel the planete...
The First Fluorine Abundance Determinations in Extragalactic AGB Carbon Stars
FluorineAbundance Determinations Extragalactic
2011/9/29
Fluorine (19F) abundances (or upper limits) are derived in six extragalactic AGB carbon stars from the HF(1-0) R9 line at 2.3358 mu in high resolution spectra. The stars belong to the Local Group gala...
The Large Observatory for X-ray Timing (LOFT)
Missions X-ray timing compact objects black holes neutron stars
2011/9/27
High-time-resolution X-ray observations of compact objects provide direct access to strong-field gravity, to the equation of state of ultra-dense matter and to black hole masses and spins. A 10 m^2-cl...
The deeply obscured AGN of NGC4945 I. Spitzer-IRS maps of [Ne V], [Ne II], H2 0-0 S(1), S(2), and other tracers
Galaxies:active – Galaxies:nuclei – Galaxies:individual:NGC 4945 – ISM:lines and bands
2011/9/27
The nearly edge-on galaxy NGC4945 is one of the closest galaxies where an AGN and starburst coexist, and is one of the brightest sources at 100 keV. Near and mid-infrared spectroscopy have shown very ...
Faraday Rotation Measure due to the Intergalactic Magnetic Field II: the Cosmological Contribution
Intergalactic Magnetic Field II Cosmological Contribution
2011/9/26
We investigate the Faraday rotation measure (RM) due to the intergalactic magnetic field (IGMF) through the cosmic web up to cosmological distances, using a model IGMF based on turbulence dynamo in th...
银河系外显现化学性质特殊的恒星
银河系外显 化学性质特殊 恒星
2010/11/29
奥地利维也纳大学天文研究所2010年11月23日发布公报说，其天文学家最近在大麦哲伦星云中首次发现具有特殊化学性质的恒星，并估计这个星云中约10%的恒星都可能是这种另类天体。
Case Studies of Interacting QSO Host Galaxies。
Observational Overview of the Feeding of Active Galactic Nuclei
Active Galactic Nuclei Observational Overview
2009/7/9
Observational Overview of the Feeding of Active Galactic Nuclei。
Structure of the Halo of the Milky Way。
Stellar populations in the calán-eso catalogue. The luminosity function and kinematics
Stellar populations luminosity function calán-eso catalogue
2009/6/25
Stellar populations in the calán-eso catalogue. The luminosity function and kinematics
of dwarfs。
Adaptive Optics Observations of Active Galactic Nuclei：Zooming into the Central Parsec Region
Optics Observations Active Galactic Nuclei Central Parsec Region
2009/6/18
Adaptive Optics Observations of Active Galactic Nuclei：Zooming into the Central Parsec Region。
Exploring the nature of weak Chandra sources near the Galactic centre
weak Chandra sources Galactic centre
2009/6/17
Exploring the nature of weak Chandra sources near the Galactic centre。