arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0810.2382hep-th
收藏

拟合星系旋转曲线:字符串与NFW轮廓

Fitting the Galaxy Rotation Curves: Strings versus NFW profile

Yeuk-Kwan E. Cheung, Feng Xu

摘要:

利用弦论的一个简单模型,得到了星系自转曲线的显著拟合。用广义Navarro-Frenk-White轮廓和暗物质模型拟合了同一星系群的自转曲线,并与之进行了比较。弦模型使用了三个自由参数,而暗物质模型使用了五个自由参数。弦模型拟合的平均卡方为1.649,而暗物质模型的卡方为1.513。广义NFW配置文件适合稍微更好的两个自由参数的价格。

英文摘要:

Remarkable fit of galaxy rotation curves is achieved using a simple model from string theory. The rotation curves of the same group of galaxies are also fit using dark matter model with the generalized Navarro-Frenk-White profile for comparison. String model utilizes three free parameters vs five in the dark matter model. The average chi-squared of the string model fit is 1.649 while that of the dark matter model is 1.513. The generalized NFW profile fits marginally better at a price of two more free parameters.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑