Sentences with phrase «alkali lines»
The primary shows weaker alkali lines than field dwarfs of similar spectral type, but still consistent with either a high - gravity dwarf or a younger object of hundreds of millions of years.
https://arxiv.org/
We have studied age dependent features in optical and near - infrared spectra of candidate members to the cluster (such as alkali lines and accretion associated indicators).
Visual analysis of our 2M0122 - 2439 B spectrum suggests a spectral type L3 - L4, and we resolve shallow $ J$ - band alkali lines, confirming its low gravity and youth.
Not exact matches
Near - IR spectroscopy shows a spectral type of L7 and reveals a triangular H - band continuum and weak alkali (K I and Na I) lines, hallmarks of low surface gravity.