Sentence examples for luminosity ratio from inspiring English sources

A further possible detection of the brown dwarf candidate Roque 9, with log LX ≈ 27.8 and X-ray-to-bolometric luminosity ratio of log(LXLbol) ≈ −2.5, may be due to a chance alignment with a background source.

Only a fraction of this mass is in the form of stars, as Messier 87 has an estimated mass to luminosity ratio of 6.3 ± 0.8.

Median values of mass-to-luminosity ratios for poor LS groups selected by these methods are 50 M⊙/L⊙ and 34 M⊙/L⊙, respectively.

The median values of the mass-to-luminosity ratios for LS triplets, Northern & Southern triplets, and Interacting triplets are 35 M⊙/L⊙, 47 M⊙/L⊙, and 13 M⊙/L⊙, respectively.

The overall similarity of forms of rotation curves for spirals of very different morphologies, coupled with the derived values for the dynamical mass-to-luminosity ratios, implies that both the dark halo mass and the disk mass contribute to the total mass distribution at all radii within the optical galaxy.

This added component gives cosmologists a chance to measure the masses of objects independent of the mass to light ratio (the ratio of a galaxy's mass in solar masses to its brightness in solar luminosities), an important tool for measuring dark matter.

Therefore, if two areas have very different brightness, the ratio deviates from 1, and if they have close luminosities, the ratio approaches 1.

For instance, the ratio of infrared luminosity to luminosity in blue light is roughly 80 for Arp 220, the first source in which a megamaser was observed.

For these galaxies we noticed a significant shift in the peak wavelength of the dust emission in the FIR and a different ratio between luminosities in the optical and IR parts of the spectra.  .

For these galaxies we noticed a significant shift in the peak wavelength of the dust emission in the FIR and a different ratio between luminosities in the optical and IR parts of the spectra. 1 http://www.cfht.hawaii.edu/~arnouts/LEPHARE/lephare.html. 2 http://cigale.oamp.fr/.oamp.fr/

The dense gas fraction is measured by the ratio of the luminosity produced by hydrogen cyanide (HCN) relative to the luminosity of carbon monoxide (CO).