Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.01554 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912179029016576 |
|---|---|
| author | Wei, Jin-Nan Chen, Rui-Jie Wei, Jun-Jie López-Corredoira, Martín Wu, Xue-Feng |
| author_facet | Wei, Jin-Nan Chen, Rui-Jie Wei, Jun-Jie López-Corredoira, Martín Wu, Xue-Feng |
| contents | The [O III] $λλ 4960,5008$ 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 [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 $0<z<0.8$. Analysis on all of the 209 spectra obtains $Δα/α= (0.5 \pm 3.7) \times 10^{-4}$, 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 $(-3.4 \pm 2.4)\times 10^{-13}$ $\mathrm{yr^{-1}}$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_01554 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Measuring the Time Variation of the Fine-structure Constant with Quasars Detected by LAMOST Wei, Jin-Nan Chen, Rui-Jie Wei, Jun-Jie López-Corredoira, Martín Wu, Xue-Feng Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory The [O III] $λλ 4960,5008$ 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 [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 $0<z<0.8$. Analysis on all of the 209 spectra obtains $Δα/α= (0.5 \pm 3.7) \times 10^{-4}$, 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 $(-3.4 \pm 2.4)\times 10^{-13}$ $\mathrm{yr^{-1}}$ 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. |
| title | Measuring the Time Variation of the Fine-structure Constant with Quasars Detected by LAMOST |
| topic | Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2409.01554 |