emission line spectrum造句

• The emission line spectrum associated with dense stellar winds has persisted ever since the late 19th century.
• The emission line spectrum is produced in the dense stellar wind and little is known about the underlying photosphere.
• It was even classified as a Wolf-Rayet star because of its strong emission line spectrum, and named WR 101f.
• It is an evolved massive star which has an emission line spectrum from a strong stellar wind caused by high luminosity and the presence of elements heavier than hydrogen in the photosphere.
• I think the answer is that in a blazar, the observed emission does not come from the accretion disc ( which would give a broad emission line spectrum, as in a quasar ), but instead comes from the relativistic jet.