【摘 要】
：
The question whether the radio properties of quasars are related tothe mass of the central black hole or the accretion rate is important for our un-derstanding
【机 构】
：
Center for Astrophysics
论文部分内容阅读
The question whether the radio properties of quasars are related tothe mass of the central black hole or the accretion rate is important for our un-derstanding of the formation of relativistic jets, but no consensus has been reachedfrom statistical analyses. Using two large quasar samples, one radio-selected, oneoptical-selected, we re-examined these relations and find that previous differencesbetween radio- and optical- selected samples can be ascribed, at least partly, to theeffect of the narrow line component. All previous claimed correlations are muchweaker, if exist at all.
其他文献
The partial oxidation of methane to synthesis gas is studied in this paper over Ni/Al2O3 catalysts under atmospheric pressure. The effects of Ni loading on the
The influence of buoyancy on vortex shedding from a heated square cylinder and its effects on the heat transfer of mixed convection were simulated.The flow equa
A facile glycosylation for the synthesis of spirostanol glycosides was reported. Using cadmium carbonate as a catalyst in CH3CN, a series of saponins was synthe
A hydrotalcite-like Mg2+/Al3+ layered double hydroxide(LDH) material was prepared by means of a modified coprecipitation method involving a rapid mixing step fo
In this paper, the author at first develops a method to study convergence of the cascadealgorithm in a Banach space without stable assumption on the initial (se
This paper gives an estimate of excess functions of rays on complete noncompact manifolds.By using this estimation,the authors can get the results in [3] as cor
Nanocrystalline TiO2 was prepared by means of a stearic acid gel method. The product was investigated by differential thermal analysis, thermogravimetric analys
A target is assumed to move according to a Brownian motion on the real line.The searcher starts from the origin and moves in the two directions from the startin
A new dihydrochromone derivative, named chaenomone, was isolated from the twigs of Chaenomeles sinensis (Thouin) Koehne. The structure was determined by spectro