anomalous abundance造句

• He discovered new gaseous nebulas and the anomalous abundance of 13 C in stellar atmospheres.
• This anomalous abundance is attributed to the decay of its parent in the inclusions, and researchers conclude that such meteorites were formed in the solar nebula before the had decayed.
• He continued his focus on developing instrumentation to solve observational problems in cosmology as the Bart J . Bok Fellow at the Steward Observatory of the University of Arizona from 1974 to 1976, where he characterized anomalous abundances in extreme halo stars and pioneered the application of the then new 2D ( digital TV ) vidicon systems and early photometry of faint stars and galaxies.
• Both are A-type main sequence stars with a stellar classification of A2 Vs . ( The's'suffix indicates that the absorption lines in the spectrum are distinctly narrow . ) In the 2009 " Catalogue of Ap, HgMn and Am stars ", the two stars have a classification of A3 Ti, indicating they are Ap stars with an anomalous abundance of titanium.