搜索结果: 1-15 共查到“理论天体物理学 Mass”相关记录24条 . 查询时间(0.082 秒)
Giant Planet Formation by Disk Instability in Low Mass Disks?
Giant Planet Formation Disk Instability Low Mass Disks
2011/1/11
Forming giant planets by disk instability requires a gaseous disk that is massive enough to become gravitationally unstable and able to cool fast enough for self-gravitating clumps to form and survive...
Shapiro delay measurement of a two solar mass neutron star
Shapiro delay measurement solar mass neutron star
2011/1/11
Neutron stars are composed of the densest form of matter known to exist in our universe, and thus provide a unique laboratory for exploring the properties of cold matter at super-nuclear density. Meas...
Space-time variation of the electron-to-proton mass ratio in a Weyl model
Space-time variation the electron-to-proton mass ratio
2011/1/13
We consider a phenomenological model where the effective fermion masses depend on the local value of Weyl tensor as a possible explanation for the recent data indicating a space-time variation of the...
Formation of the black-hole binary M33 X-7 via mass-exchange in a tight massive system
the black-hole binary M33 X-7 via mass-exchange
2011/1/10
M33 X-7 is among the most massive X-Ray binary stellar systems known, hosting a rapidly spinning 15.65 Msun black hole orbiting an underluminous 70 Msun Main Sequence companion in a slightly eccentric...
We study the mass-density relationship n m^x in molecular cloud clumps, considering various relations between the gravitational, kinetic, internal and magnetic energy. Clumps are described statistical...
The rapid rotation (P=0.44 d) of the M dwarf V374Peg (M4) along with its intense magnetic field point toward magneto-centrifugal acceleration of a coronal wind. In this work, we investigate the struct...
Using Dark Matter Haloes to Learn about Cosmic Acceleration: A New Proposal for a Universal Mass Function
Dark Matter Haloes Cosmic Acceleration
2011/1/11
Structure formation provides a strong test of any cosmic acceleration model because a successful dark energy model must not inhibit {\black or overpredict} the development of observed large-scale stru...
Probing Intermediate Mass Black Holes With Optical Emission Lines from Tidally Disrupted White Dwarfs
Probing Intermediate Mass Black Holes Optical Emission Lines
2011/1/13
We calculate the emission line spectrum produced by the debris released when a white dwarf (WD) is tidally disrupted by an intermediate-mass black hole (IMBH; $M\sim 10^{2}-10^{5}\msun$) and we explor...
High Mass X-ray Binaries in the NIR : Orbital solutions of two highly obscured systems
High Mass X-ray Binaries；the NIR
2011/1/13
The maximum mass of a neutron star (NS) is poorly defined. Theoretical attempts to define this mass have thus far been unsuccessful. Observational results currently provide the only means of narrowing...
The Interplay of Magnetic Fields, Fragmentation and Ionization Feedback in High-Mass Star Formation
Magnetic Fields Fragmentation High-Mass Star Formation
2011/1/13
Massive stars disproportionately influence their surroundings. How they form has only started to become clear recently through radiation gas dynamical simulations. However, until now, no simulation ha...
The Mass-Radius(-Rotation?) Relation for Low-Mass Stars
Mass-Radius Relation Low-Mass Stars
2010/11/15
The fundamental properties of low-mass stars are not as well understood as those of their more
massive counterparts. The best method for constraining these properties, especially masses and radii,is ...
Spectral Index as a Function of Mass Accretion Rate in Black Hole Sources. Monte-Carlo Simulations and an Analytical Description
black hole physics accretion disks radiation mechanisms
2010/11/16
We present herein a theoretical study of correlations between spectral indexes of X-ray emergent spectra and mass accretion rate (m˙ ) in black hole (BH) sources,which provide a definitive signature f...
On the Accuracy of Weak Lensing Cluster Mass Reconstructions
galaxies clusters general— gravitational lensing
2010/11/11
We study the bias and scatter in mass measurements of galaxy clusters resulting from fitting sphericallysymmetric Navarro, Frenk & White (NFW) model to the reduced tangential shear profile measured in...
Mass Transfer in Binary Stars using SPH. I. Numerical Method
galaxies active - line formation - radiation mechanism general - scattering - X-rays general
2010/11/12
We present new results from Monte Carlo calculations of the flux and equivalent width
(EW) of the Ni K fluorescent emission line in the toroidal X-ray reprocessor model of
Murphy & Yaqoob (2009, MN...
The radius anomaly in the planet/brown dwarf overlapping mass regime
radius anomaly mass regime
2010/11/9
The recent detection of the transit of very massive substellar companions (Deleuil et al. 2008; Bouchy et al. 2010;Anderson et al. 2010; Bakos et al. 2010) provides a strong con-
straint to planet an...