搜索结果: 1-12 共查到“理论天体物理学 local”相关记录12条 . 查询时间(0.099 秒)
We show that in theories of generalised teleparallel gravity, whose Lagrangians are algebraic functions of the usual teleparallel Lagrangian, the action and the field equations are not invariant unde...
The local energy production rates of GRB photons and of UHECRs
The local energy production rates GRB photons UHECRs
2011/1/10
In a recent analysis it was found that the local (z=0) rate at which gamma-ray bursts (GRBs) produce energy in 1 MeV photons, Q_GRB(z=0), is 300 times lower than the local energy production rate in ul...
A view of the solar neighbourhood: the local population of planetary nebulae and their mimics
the solar neighbourhood the local population
2011/1/10
We have, for the first time, compiled a nearly complete census of planetary nebulae (PNe) centred on the Sun. Our goal is the generation of an unbiased volume-limited sample, in order to answer some l...
We present an analysis of the winding sense (S and Z-shaped) of 1\,621 field galaxies that have radial velocity between 3\,000 km s$^{-1}$ to 5\,000 km s$^{-1}$. The preferred alignments of S- and Z-s...
Probing the parameter space of HD 49933: a comparison between global and local methods
comparison global local methods
2010/11/16
We present two independent methods for studying the global stellar parameter space (mass M, age, chemical composition X0, Z0) of HD 49933 with seismic data. Using a local minimization and an MCMC algo...
Optical multiband surface photometry of a sample of Seyfert galaxies. I. Large-scale morphology and local environment analysis of matched Seyfert and inactive galaxy samples
galaxies Seyfert – galaxies structure – techniques image processing – techniques photometric
2010/11/12
Context. Parallel analysis of the large-scale morphology and local environment of matched active and control galaxy samples plays an important role in studies of the fueling of active galactic nuclei.
Towards a fully consistent Milky Way disc model - II. The local disc model and SDSS data of the NGP region
Galaxy Astrophysics (astro-ph.GA)
2010/12/31
We have used the self-consistent vertical disc models of the solar neighbourhood presented in Just & Jahreiss (2010), which are based on different star formation histories (SFR) and fit the local kine...
More galaxies in the Local Volume imaged in H-alpha
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/28
We have carried out an H-alpha flux measurement for 52 nearby galaxies as part of a general H-alpha imaging survey for the Local Volume sample of galaxies within 10 Mpc. Most of the objects are probab...
Groups of dwarf galaxies in the Local supercluster
Cosmology and Extragalactic Astrophysics (astro-ph.CO
2010/12/27
We present a project on study of groups composed of dwarf galaxies only. We selected such structures using HyperLEDA and NED databases with visual inspection on SDSS images and on digital copy of POSS...
Local non-Gaussianity in the Cosmic Microwave Background the Bayesian way
Cosmology and Extragalactic Astrophysics (astro-ph.CO)
2010/12/27
We introduce an exact Bayesian approach to search for non-Gaussianity of local type in Cosmic Microwave Background (CMB) radiation data. Using simulated CMB temperature maps, the newly developed techn...
Determining Absorption, Emissivity Reduction, and Local Suppression Coefficients inside Sunspots
Solar and Stellar Astrophysics (astro-ph.SR)
2010/12/23
The power of solar acoustic waves is reduced inside sunspots mainly due to absorption, emissivity reduction, and local suppression. The coefficients of these power-reduction mechanisms can be determin...
Local causal structures, Hadamard states and the principle of local covariance in quantum field theory
quantum field theory local covariance
2010/3/18
In the framework of the algebraic formulation, we discuss and analyse some new features of the local structure of a real scalar quantum field theory in a strongly causal spacetime. In particular we us...