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天文和天体物理学研究
天文和天体物理学研究

汪景琇 景益鹏

月刊

1674-4527

wenyy@bao.ac.cn

010-64853746

100717

北京朝阳区大屯路甲20号国家天文台 RAA编辑部

天文和天体物理学研究/Journal Research in Astronomy and AstrophysicsCSCD北大核心CSTPCDSCI
查看更多>>本刊1981年创刊至2000年已出版20卷。创刊时为中文期刊,2001年改为《中国天文和天体物理学报》(英文版)。主要刊登天文学和天体物理学领域的原创性研究论文。主要栏目和报道范围:“研究快报”用来报道天文观测的新结果及新理论;“特约综述”聘请国际知名天文学家就某些热点问题进行专题评述。“研究论文”具有原创性。2009年更名为《天文和天体物理学研究》(英文版),由双月刊变为月刊。
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    Measuring the Time Variation of the Fine-structure Constant with Quasars Detected by LAMOST

    魏晋南陈睿劫魏俊杰Martín López-Corredoira...
    229-235页
    查看更多>>摘要:The[O Ⅲ]λλ4960,5008 emission lines in the optical spectra of galaxies and quasars have been widely used to investigate the possible variation of the fine-structure constant α over cosmic time.In this work,we utilize the Large Sky Area Multi-object Fiber Spectroscopic Telescope(LAMOST)quasar survey,for the first time,to measure the relative α variation Δα/α in time through the[OⅢ]doublet method.From the LAMOST Data Release 9 quasar catalog,we refine a sample of 209 quasar spectra with strong and narrow[O Ⅲ]emission lines over a redshift range of 0<z<0.8.Analysis on all of the 209 spectra obtains Δα/α=(0.5±3.7)×10-4,which suggests that there is no evidence of varying α on the explored cosmological timescales.Assuming a linear variation,the mean rate of change in Δα/α is limited to be(-3.4±2.4)×10-13 yr-1 in the last 7.0 Gyr.While our LAMOST-based constraint on Δα/α is not competitive with those of the Sloan Digital Sky Survey(SDSS)quasar observations,our analysis serves to corroborate the results of SDSS with another independent survey.

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