Cracked media, Poisson's ratio and the structure of the upper oceanic crust     

Peter M. Shearer 《Geophysical Journal International》1988,92(2):357-362

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湖北省棉花产量的变化与棉田布局的战略调整^*     

唐文雅 《地理研究》1988,7(3):34-43

本文揭示了湖北省棉花亩产的增长具有北高南低的特点,分析了鄂北地区种植棉花的自然优势和经济效盆大于江汉平原,从而提出湖北省棉花北移的战略调整的设想。  相似文献   

The properties of spiral galaxies: confronting hierarchical galaxy formation models with observations     

Eric F. Bell  Carlton M. Baugh  Shaun Cole  Carlos S. Frenk  Cedric G. Lacey 《Monthly notices of the Royal Astronomical Society》2003,343(2):367-384

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Cyclotron absorption in rotating pulsar magnetospheres     

D. Fussell  Q. Luo  D. B. Melrose 《Monthly notices of the Royal Astronomical Society》2003,343(4):1248-1256

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Precession of isolated neutron stars – II. Magnetic fields and type II superconductivity     

Ira Wasserman 《Monthly notices of the Royal Astronomical Society》2003,341(3):1020-1040

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The lack of variability of the iron line in MCG–6-30-15: general relativistic effects     

G. Miniutti  A. C. Fabian  R. Goyder  A. N. Lasenby 《Monthly notices of the Royal Astronomical Society》2003,344(2):L22-L26

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Distances to Cepheid open clusters via optical and K-band imaging     

Fiona Hoyle  Tom Shanks  N. R. Tanvir 《Monthly notices of the Royal Astronomical Society》2003,345(1):269-291

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Direct Determination of Galaxy Luminosity Functions in Clusters     

D. Christlein  A. Zabludoff 《Astrophysics and Space Science》2003,285(1):197-201

We present R-band galaxy luminosity functions (GLFs) from aspectroscopic sample of six nearby rich galaxy clusters. In addition to individual cluster GLFs, extending to, in one case, M _R=–14, we also present composite GLFs for cluster and field galaxies toM _R=–17. All six cluster samples are consistent with the composite GLF, but there is evidence that the GLF of the quiescent population in clusters is not universal. Furthermore, the GLF of quiescent galaxies is significantly steeper in clusters than in the field. The overall GLF in clusters is consistent with that of field galaxies, except for the luminous tip, which is enhanced in clusters versus the field. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Constraining dark energy from the abundance of weak gravitational lenses     

Nevin N. Weinberg  Marc Kamionkowski 《Monthly notices of the Royal Astronomical Society》2003,341(1):251-262

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WIYN Open Cluster Study – XVI. Optical/infrared photometry and comparisons with theoretical isochrones     

Aaron J. Grocholski  Ata Sarajedini 《Monthly notices of the Royal Astronomical Society》2003,345(3):1015-1029

We present combined optical/near-infrared photometry ( BVIK ) for six open clusters – M35, M37, NGC 1817, NGC 2477, NGC 2420 and M67. The open clusters span an age range from 150 Myr to 4 Gyr and have metal abundances from  [Fe/H]=−0.27  to +0.09 dex. We have utilized these data to test the robustness of theoretical main sequences constructed by several groups as denoted by the following designations – Padova, Baraffe, Y², Geneva and Siess. The comparisons of the models with the observations have been performed in the  [ M_V , ( B − V )₀], [ M_V , ( V − I )₀]  and  [ M_V , ( V − K )₀]  colour–magnitude diagrams as well as the distance-independent  [( V − K )₀, ( B − V )₀]  and  [( V − K )₀, ( V − I )₀]  two-colour diagrams. We conclude that none of the theoretical models reproduces the observational data in a consistent manner over the magnitude and colour range of the unevolved main sequence. In particular, there are significant zero-point and shape differences between the models and the observations. We speculate that the crux of the problem lies in the precise mismatch between theoretical and observational colour–temperature relations. These results underscore the importance of pursuing the study of stellar structure and stellar modelling with even greater intensity.  相似文献