The influence of grain rotation on the structure of dust aggregates     

D. Paszun  C. Dominik 《Icarus》2006,182(1):274-280

We study the effect of rotation during the collision between dust aggregates, in order to address a mismatch between previous model calculations of Brownian motion driven aggregation and experiments. We show that rotation during the collision does influence the shape and internal structure of the aggregates formed. The effect is limited in the ballistic regime when aggregates can be considered to move on straight lines during a collision. However, if the stopping length of an aggregate becomes smaller than its physical size, extremely elongated aggregates can be produced. We show that this effect may have played a role in the inner regions of the solar nebula where densities were high.  相似文献   

Theory and practice of microlensing light curves around fold singularities     

M. Dominik 《Monthly notices of the Royal Astronomical Society》2004,353(1):69-86

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Can microlensing fold caustics reveal a second stellar limb-darkening coefficient?     

M. Dominik 《Monthly notices of the Royal Astronomical Society》2004,352(4):1315-1318

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Disintegration of dust aggregates in interstellar shocks and the lifetime of dust grains in the ISM     

C. Dominik  A. P. Jones  A. G. G. M. Tielens 《Astrophysics and Space Science》1995,233(1-2):155-159

We have studied to influence of grain porosity on the dust destruction mechanism in interstellar shocks. Our results show, that fluffy aggregates of dust grains can be broken up easily in shocks.  相似文献   

Adaptive contouring – an efficient way to calculate microlensing light curves of extended sources     

M. Dominik † 《Monthly notices of the Royal Astronomical Society》2007,377(4):1679-1688

The availability of a robust and efficient routine for calculating light curves of a finite source magnified due to bending of its light by the gravitational field of an intervening binary lens is essential for determining the characteristics of planets in such microlensing events, as well as for modelling stellar lens binaries and resolving the brightness profile of the source star. However, the presence of extended caustics, and the fact that the images of the source star cannot be determined analytically while their number depends on the source position (relative to the lens system), makes such a task difficult in general. Combining the advantages of several earlier approaches, an adaptive contouring algorithm is presented, which only relies on a small number of simple rules and operations on the adaptive search grid. By using the parametric representation of critical curves and caustics found by Erdl & Schneider, seed solutions to the adaptive grid are found, which ensures that no images or holes are missed.  相似文献   

Why can't we do better than Topmodel?     

Wouter Buytaert  Dominik Reusser  Stefan Krause  J.‐P. Renaud 《水文研究》2008,22(20):4175-4179

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Photometry of yellow semi-regular variables: TW Cam     

E. Zsoldos  Z. Kolláth 《Astrophysics and Space Science》1991,181(2):251-259

New photoelectric photometry of TW Cam is presented. Fourier analysis of the light curve shows a group of peaks at 43^d. The first return maps of the primary and secondary minima differ remarkably, that of the secondary minima showing significantly larger scatter. This difference implies that the pulsation period of the star is the formal period (i.e., the distance between two primary minima).  相似文献   

The power spectrum of SUSY-CDM on subgalactic scales     

Anne M. Green  Stefan Hofmann  Dominik J. Schwarz 《Monthly notices of the Royal Astronomical Society》2004,353(3):L23-L27

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Recovery and concentration of suspended solids in the upper rhone river by continuous flow centrifugation     

D. Burrus  R. L. Thomas  J. Dominik  J.-P. Vernet 《水文研究》1989,3(1):65-74

Six stations along the Rhône River from the Rhône Glacier to Lake Geneva were sampled by continuous flow centrifuge for recovery of suspended sediment. The samples were taken four times in the year in both 1982 and 1983. In addition, the mouth of the river was sampled in a like manner every two weeks during 1982 until August 1983. Concentration of sediment and composition did not vary as a function of depth or location across the river. Concentrations varied in time and as a function of flow and samples showed both increasing concentration in suspension and an increase in the proportion of finer particles moving downstream from source to mouth. Only slight variations in texture could be observed down the river as a function of time and appeared to relate to freezing and melting of the Rhône and other headwater glaciers as the primary sediment source. Little variation was observed annually in the texture and composition of the sediment at the river mouth despite large changes in concentration between the high flow summer and low flow winter discharges. These findings are consistent with a well-mixed system in which the suspended sediments are directly related to the primary supply of material from the glaciers.  相似文献   

The Chervettaz (L5) meteorite     

B. Dominik  F. Bussy  N. Meisser 《Meteoritics & planetary science》1994,29(5):696-697

Abstract The Chervettaz meteorite was an observed fall on 1901 November 30. Our study confirms the previous classification as an L5 chondrite. Weak deformations indicate stage S3 of shock deformations.  相似文献