What spectral feature is a direct sign of recent star formation when analyzing a spiral galaxy's light?
Answer
Strong H a emission.
The spectrum of an actively forming spiral galaxy will show strong emission lines indicative of ionization caused by young, hot stars, such as strong H a emission.
#Videos
Differences Between Spiral And Elliptical Galaxies? - YouTube
Related Questions
What structural feature primarily characterizes spiral galaxies like the Milky Way?What is the primary requirement for sustaining active star formation in a galaxy?Why do the spiral arms of a galaxy often appear bright blue?What event is the most common theory for the formation of large elliptical galaxies?How are the stellar motions typically described in elliptical galaxies compared to spirals?Where is the cold gas and dust reservoir primarily concentrated in spiral galaxies?What does the predominantly red or yellowish hue of elliptical galaxies signify?What process following a spiral galaxy merger actively halts large-scale star formation in the resulting elliptical?Where are spiral galaxies most often found, allowing them to maintain steady star formation?What spectral feature is a direct sign of recent star formation when analyzing a spiral galaxy's light?