A strong fit between temperature and the abundance ratio would allow observers to spectroscopically detect the ratio and then extrapolate the temperature of the environment, thus gaining great insight into the environment of the species.
12.
The methane abundance relative to molecular hydrogen in the stratosphere is about 10 " 4, while the abundance ratio of other light hydrocarbons, like ethane and acetylene, to molecular hydrogen is about 10 " 6.
13.
This has led to unusual uncertainty in the standardized atomic weight of lithium, since this quantity depends on the natural abundance ratios of these naturally-occurring stable lithium isotopes, as they are available in commercial lithium mineral sources.
14.
In 1986, Goldsmith et al . measured the abundances of rare isotopes of HNC and HCN along the OMC-1 and determined that the abundance ratio varies by more than an order of magnitude in warm regions versus cold regions.
15.
The presence of such carbon-bearing macromolecules in the X-shaped nebular component, while the equatorial regions are known to contain silicate-rich ( O-bearing ) dust grains, was interpreted as due to a change of the O / C abundance ratio of the primary star during its late evolution.
16.
Helmich and van Dishoeck performed a survey of the W 3 Giant Molecular Cloud in 1997 in which they detected over 24 different molecular isotopes, comprising over 14 distinct chemical species, including HNC, HN 13 C, and H 15 NC . This survey further confirmed the temperature dependence of the abundance ratio, [ HNC ] / [ HCN ], this time ever confirming the dependence of the isotopomers.
