Measuring the Time Variation of the Fine-structure Constant with Quasars Detected by LAMOST

被引：0

作者：

魏晋南 ^{[1
,2
,3
]}

陈睿劼 ^{[1
,4
]}

魏俊杰 ^{[1
,2
]}

Martn LpezCorredoira ^{[5
,6
,7
]}

吴雪峰 ^{[1
,2
]}

机构：

[1] Purple Mountain Observatory, Chinese Academy of Sciences

[2] School of Astronomy and Space Sciences, University of Science and Technology of China

[3] Shanghai Astronomy Museum (branch of Shanghai Science & Technology Museum)

[4] Department of Physics, Imperial College London

[5] Instituto de Astrofísica de Canarias

[6] PIFI-Visiting Scientist of China Academy of Sciences at Purple Mountain Observatory

[7] Departamento de Astrofísica, Universidad de La Laguna

来源：

Research in Astronomy and Astrophysics | 2024年 / 24卷 / 12期

关键词：

D O I：

暂无

中图分类号：

P158 [类星体、类星射电源];

学科分类号：

070401 ;

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 variationΔα/α in time through the[O III]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 0-4,which suggests that there is no evidence of varying α on the explored cosmological timescales.Assuming a linear variation,the mean rate of change inΔα/α is limited to be （-3.4±2.4）×10-13yr-1in the last 7.0 Gyr.While our LAMOST-based constraint onΔα/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.

引用

页码：231 / 237

页数：7