Nitrogen isotopic ratio in prestellar cores

The ^15^N fractionation has been observed to show large variations among astrophysical sources, depending both on the type of target and on the molecular tracer used. These...现已观测到，氮15（¹⁵N）同位素分馏在不同天体物理源（astrophysical sources）间存在显著差异，其差异程度既取决于靶体类型，也与所采用的分子示踪剂（molecular tracer）有关。上述……