Wavelengths of [Fe II] from quasar J110325-264515 for a study of space-time variations in the fine-structure constant

New Limit on Space-Time Variations in the Proton-to-Electron Mass Ratio from Analysis of Quasar J110325-264515 Spectra

“…I obtained χ 2 -minimal for each one of the whole fits, and these were plotted as a general function of ∆µ/µ. The study concludes that the changing value of ∆µ/µ was below 10 −8 with a higher precision based on the standard statistical and systematic error deviation: σ 2 tot = σ 2 ∆µ/µ + σ 2 sys [22,58,60]. In this case, the present study provides an estimation of ∆µ/µ, an order magnitude better than previous studies using the same data [60][61][62][63][64][65][66][67][68][69][70][71][72].…”

“…Observations including almost all of the atomic and molecular absorption lines can provide us with an important tool for testing these variations with a wide range of redshifts. The small variation can be inferred from a previous study with high precision, as follows [58]:…”

“…Statistical and systematic errors including wavelength calibration were discussed in detail in [52][53][54][55][56][57]. We applied the previous analysis method with non-linear least-squares and several mÅ to determine the laboratory uncertainty errors of [Fe II] lines [58]. The obtained results are shown in Table 1, and the plot is illustrated in Figure 1 for ∆µ/µ over cosmological space-time at a 10 −7 level with a high-accuracy estimation of systematic error.…”

Stringent limit on space-time variation of fine-structure constant using high-resolution of quasar spectra

“…Thus, the effect of space-time variations in could be observed by calculating the relativistic energy shifts of the atomic and molecular spectra from quasars and comparing it to the laboratory sample values. It allowed us to identify statistical and systematical errors with higher accuracy [ 31 , 32 , 33 ]. The best determined connection using this procedure inferred an alteration with the cosmological space-time of over redshift range: [ 31 , 32 , 33 ].…”

“…It allowed us to identify statistical and systematical errors with higher accuracy [ 31 , 32 , 33 ]. The best determined connection using this procedure inferred an alteration with the cosmological space-time of over redshift range: [ 31 , 32 , 33 ]. Therefore, we tested space-time variation in over wide-spanning redshifts for doublet and multiplet lines with high accuracy while subject to low systematic effects, leading to a higher level accuracy of determintation [ 34 ].…”