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- noun Plural form of
Sorry, no etymologies found.
Stellar magnetic activity can be measured by monitoring H and K emission lines from ionized calcium in their chromospheres, since such emission is correlated with magnetic fields in the Sun.
By this method it enables to view even the chromospheres which are just above the photosphere.
Dr. Preston is recognized for a lifetime of research that has transformed our understanding of RR Lyrae variables, stellar magnetic fields and stellar chromospheres, and led to a comprehensive view of the nature, chemistry, kinematics, and metallicity and age distribution in the galactic stellar halo.
The next zone is the chromospheres, where the temperature rises to 20,000 K.