搜索结果: 1-13 共查到“天文学 scales”相关记录13条 . 查询时间(0.062 秒)
Gravitational waves, like the discovery of the Higgs boson in 2012, have made their mark on a decade of extraordinary discoveries in physics. Unlike gravity, which is created when massive objects leav...
Collisional evolution and reddening of asteroid surfaces–I. The problem of conflicting time-scales and the role of size-dependent effects
meteorites meteors meteoroids–minor planets asteroids: general
2015/12/25
Space weathering is the generic term used for processes that modify the optical properties of surfaces of atmosphereless rocky bodies under exposure to the space environment. The general agreement abo...
Non-relativistic Extended Gravity and its applications across different astrophysical scales
Non-relativistic Extended Gravity applications different astrophysical scales
2012/2/23
Using dimensional analysis techniques we present an extension of Newton's gravitational theory built under the assumption that Milgrom's acceleration constant is a fundamental quantity of nature. The ...
Avoiding bias in reconstructing the largest observable scales from partial-sky data
Avoiding bias reconstructing largest observable partial-sky data
2011/10/18
Obscuration due to Galactic emission complicates the extraction of information from cosmological surveys, and requires some combination of the (typically imperfect) modeling and subtraction of foregro...
High energy emission can be produced in the interaction sites of both galactic and extragalactic jets with the surrounding medium. We have developed a radiative model that accounts for the continuous ...
Warm dark matter at small scales: peculiar velocities and phase space density
Warm dark matter small scales peculiar velocities phase space density
2010/11/12
We study the scale and redshift dependence of the power spectra for density perturbations and
peculiar velocities, and the evolution of a coarse grained phase space density for (WDM) particles that d...
1.3 mm Wavelength VLBI of Sagittarius A*: Detection of Time-Variable Emission on Event Horizon Scales
Galaxy center — submillimeter general — techniques high angular resolution — techniques
2010/11/15
Sagittarius A*, the 4 × 106 M⊙ black hole candidate at the Galactic Center, can be studied on Schwarzschild radius scales with (sub)millimeter wavelength Very Long Baseline Interferometry (VLBI). We...
Particle Acceleration on Megaparsec Scales in a Merging Galaxy Cluster
Particle Acceleration Megaparsec Scales Merging Galaxy Cluster
2011/1/10
Galaxy clusters form through a sequence of mergers of smaller galaxy clusters and groups. Models of diffusive shock acceleration (DSA) suggest that in shocks that occur during cluster mergers, particl...
Cosmic ray propagation time scales: lessons from radioactive nuclei and positron data
High Energy Astrophysical Phenomena (astro-ph.HE) High Energy Physics - Phenomenology (hep-ph)
2011/1/4
We take a fresh look at high energy radioactive nuclei data reported in the 90's and at the positron data recently reported by PAMELA. Our aim is to study the model independent implications of these d...
Averting the magnetic braking catastrophe on small scales: disk formation due to Ohmic dissipation
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/29
We perform axisymmetric resistive MHD calculations that demonstrate that centrifugal disks can indeed form around Class 0 objects despite magnetic braking. We follow the evolution of a prestellar core...
Signatures of mass accretion onto agn from sub-parsec to kiloparsec scales
mass accretion kiloparsec scales sub-parsec
2009/6/25
Signatures of mass accretion onto agn from sub-parsec to kiloparsec scales。
Observational Evidence for Triggered Star Formation on Scales of 1 to 300 pc
Star Formation 1 to 300 pc Scales
2009/6/15
Observational Evidence for Triggered Star Formation on Scales of 1 to 300 pc。
Modeling the Dust Emission of the L 1551 IRS 5 Binary System at Different Scales
Dust Emission L 1551 IRS 5 Binary System
2009/6/15
Modeling the Dust Emission of the L 1551 IRS 5 Binary System at Different Scales。