搜索结果: 1-13 共查到“天文学 shape”相关记录13条 . 查询时间(0.093 秒)
COUPLED SPIN AND SHAPE EVOLUTION OF SMALL RUBBLE-PILE ASTEROIDS:SELF-LIMITATION OF THE YORP EFFECT
methods numerical–minor planets,asteroids general
2015/12/25
We present the first self-consistent simulations of the coupled spin-shape evolution of small gravitational aggregates under the influence of the YORP effect. Because of YORP's sensitivity to surface ...
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...
I review what bispectra and trispectra look like in real space, in terms of the sign of particular shaped triangles and tetrahedrons. Having an equilateral density bispectrum of positive sign correspo...
Cosmological implications from the full shape of the large-scale power spectrum of the SDSS DR7 luminous red galaxies
large-scale structure of Universe – cosmology: theory – cosmology: observations – cosmological parameters
2011/10/12
We obtain cosmological constraints from a measurement of the spherically averaged power spectrum (PS) of the distribution of about 90000 luminous red galaxies (LRGs) across 7646 deg2 in the Northern G...
A decay of the ultra-high-energy neutrino $\nu_e \to e^- W^+$ in a magnetic field and its influence on the shape of the neutrino spectrum
the ultra-high-energy neutrino the neutrino spectrum
2011/1/13
The width of the neutrino decay into the electron and $W$ boson in a strong external magnetic field is obtained from the imaginary part of the neutrino self-energy. This result corrects the formulae ...
An Initial Mass Function for Individual Stars in Galactic Disks: I. Constraining the Shape of the IMF
Galaxy Astrophysics (astro-ph.GA)
2010/12/29
We derive a semi-empirical galactic initial mass function (IMF) from observational constraints. We assume that the star formation rate in a galaxy can be expressed as the product of the IMF, $\psi (m)...
Primary Beam Shape Calibration from Mosaicked, Interferometric Observations
Instrumentation and Methods for Astrophysics (astro-ph.IM)
2010/12/24
Image quality in mosaicked observations from interferometric radio telescopes is strongly dependent on the accuracy with which the antenna primary beam is calibrated. The next generation of radio tele...
Physical mechanisms that shape the morphologies of extragalactic jets
morphologies extragalactic jets
2009/7/9
Physical mechanisms that shape the morphologies of extragalactic jets。
Morpho-Kinematic Modeling of Gaseous Nebulae with SHAPE
Morpho-Kinematic Modeling Gaseous Nebulae
2009/6/30
Morpho-Kinematic Modeling of Gaseous Nebulae with SHAPE。
Chandra monitoring observation of the antennae Galaxies：the x-ray source populations and the shape of Their luminosity function
antennae Galaxies luminosity function x-ray source
2009/6/17
Chandra monitoring observation of the antennae Galaxies：the x-ray source populations and the shape of Their luminosity function。
A kinematic study of n119 in the lmc：a rotating nebula with spiral shape?
n119 rotating nebula lmc spiral shape
2009/6/11
A kinematic study of n119 in the lmc：a rotating nebula with spiral shape?
The Reliability of Shape Measurements。
Search for the shape resonance in the negative ion of hydrogen in astrophysical plasmas
shape resonance astrophysical plasmas negative ion of hydrogen
2009/6/4
Search for the shape resonance in the negative ion of hydrogen in astrophysical plasmas。