文章摘要
利用天文观测数据验证距离对偶关系
Testing the distance duality relation withthe astronomical observation data
  
DOI:
中文关键词: 距离对偶关系  光度距离  角直径距离
英文关键词: istance-duality relation  luminosity distance  angular diameter distance
基金项目:国家自然科学基金资助项目(11147011);湖南省自然科学基金资助项目(12JJA001)
作者单位
陈朝霞,周并举 湖南科技大学 物理学院湖南 湘潭 411201 
摘要点击次数: 1135
全文下载次数: 8
中文摘要:
      采用模型独立方法通过对比现今天文观测数据光度距离DL和角直径距离DA来验证距离对偶关系DL/(DA(1+z)2)=1.为了得到与角直径距离相同红移所对应的光度距离,对超新星数据采用2种方法进行处理:并方法和抹平法,同时对距离对偶关系进行4种参数化:η=1+ηoz,η=1+ηoz/(1+z),η=1+ηoz/(1+z)2,η=1-ηoln(1+z),通过对比光度距离与角直径距离,利用卡方统计对ηo进行限制,从而验证距离对偶关系的有效性.结果表明,距离对偶关系和目前的观测数据符合的较好,没有明显的偏差,并且所得结果与所选用的方法和参数化形式无关.
英文摘要:
      The cosmological model independent tests were performed for the distance-duality (DD) relation DL/(DA(1+z)2)=1 by combining the angular diameter distance DAwith the luminosity distanceDL. Two methods were employed, method A was binning the SNe Ia data and method B was smoothing method with the Gaussian smoothing function, to obtain DL associated with the redshits of the observed DA. Four parameterizations were adopted, separoctely they were η=1+ηoz,η=1+ηoz/(1+z),η=1+ηoz/(1+z)2,η=1-ηoln(1+z). It found that DD relation was consistent with the present observational data, and the results were not sensitive to the methods and parameterizations.
查看全文   查看/发表评论  下载PDF阅读器
关闭