排序方式： 共有115条查询结果，搜索用时 31 毫秒
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M. J. Darnley † M. F. Bode E. Kerins A. M. Newsam J. An P. Baillon V. Belokurov S. Calchi Novati B. J. Carr M. Crézé N. W. Evans Y. Giraud-Héraud A. Gould P. Hewett Ph. Jetzer J. Kaplan S. Paulin-Henriksson S. J. Smartt Y. Tsapras M. Weston 《Monthly notices of the Royal Astronomical Society》2006,369(1):257-271
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Pauline Barmby Kathryn M. Perrett Terry J. Bridges 《Monthly notices of the Royal Astronomical Society》2002,329(2):461-464
The M31 globular cluster candidate has long been known to be an extremely red, non-stellar object. The first published spectrum of this object is used to confirm that it is a globular cluster belonging to M31, with rather typical values of and . Using the spectroscopic metallicity to predict the intrinsic colours, we derive a reddening value of , in good agreement with the value obtained using reddening-free parameters. The extinction-corrected magnitude of is (absolute magnitude , which makes it the most luminous globular cluster in M31. We examine van den Bergh's argument regarding the brightest and most-reddened globular cluster in M31; we find that the brightest clusters are more heavily reddened than average, but this can be explained by selection effects rather than a different R V in M31. 相似文献
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Three types of ice loading, which are most commonly present when ice acts on structures, are chosen and simulated for use of fatigue crack propagation tests on offshore structural steel A131. The three types of ice categorized in accordance with the failure modes when acting on structures called crushing ice, bending ice, and buckling ice, respectively. This paper presents an experimental investigation on the fatigue crack propagation behavior of widely used high strength steel A131 for offshore jackets in the loading environment of ice crushing, bending, and buckling. The test results of fatigue crack propagation in steel A131 under these simulated ice loading at temperature 292K. are presented and analyzed in detail in this paper. The amplitude root mean square stress intensity factor is optimized to be the fundamental parameter of fatigue crack propagation for all types of ice loading histories. The results are also compared with constant amplitude fatigue crack propagation conclusions as in wave loa 相似文献
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