line ratio

'line ratio' can also refer to...

line ratio

Measuring age, metallicity and abundance ratios from absorption-line indices

Diagnostic line ratios in the IC 1805 optical gas complex

High-precision effective temperatures of 215 FGK giants from line-depth ratios

Improved collision strengths and line ratios for forbidden [O iii] far‐infrared and optical lines

High-precision effective temperatures of 161 FGK supergiants from line-depth ratios

Type 1 AGN at low z – III. The optical narrow-line ratios

Bowen fluorescence lines in symbiotic stars — I. Observational data, line ratios and efficiency

Accretion shocks in T Tauri stars: diagnosis via semiforbidden ultraviolet line ratios

Seyfert-Type Dependences of Narrow Emission-Line Ratios and Physical Properties of High-Ionization Nuclear Emission-Line Regions in Seyfert Galaxies

Abundance determination from global emission-line SDSS spectra: exploring objects with high N/O ratios

On the effects of line-of-sight structures on lensing flux-ratio anomalies in a ΛCDM universe

Flux-calibrated stellar population models of Lick absorption-line indices with variable element abundance ratios

Weak lensing by line-of-sight haloes as the origin of flux-ratio anomalies in quadruply lensed QSOs

Association Between Loci With Deleterious Alleles and Distorted Sex Ratios in an Inbred Line of Tilapia (Oreochromis aureus)

Spectral luminosity indicators in Type Ia supernovae. Understanding the (Si ii) line-strength ratio and beyond

Exploring AGN–starburst coexistence in galaxies at z ∼ 0.8 using the [O iii]4959+5007/[O iii]4363 line ratio

Line-depth-ratio temperatures for the close binary ν Octantis: new evidence supporting the conjectured circumstellar retrograde planet

Standardizing sablefish (Anoplopoma fimbria) long-line survey abundance indices by modeling the log-ratio of paired comparative fishing cpues


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Quick Reference

The ratio of the strengths (equivalent widths) of two particular absorption or emission lines. Because these lines correspond to different energy levels or arise from entirely different elements, they can be sensitive to the density and/or temperature of the gas. For example, in a hot gas, the ratio of the Hα to the Hβ line strength is sensitive to the density of the gas.

Subjects: Astronomy and Astrophysics.

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