Also found in: Thesaurus, Encyclopedia.


1. An incandescent, transparent layer of gas, primarily hydrogen, several thousand miles in depth, lying above and surrounding the photosphere of a star, such as the sun, but distinctly separate from the corona.
2. A gaseous layer similar to a chromosphere around a star.

chro′mo·spher′ic (-sfîr′ĭk, -sfĕr′-) adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Mentioned in ?
References in periodicals archive ?
The pulses could travel all the way upward and reach the top of the solar chromospheric layers, or, even beyond.'
To observe the chromosphere, a team led by Paul Bryans, Phil Judge, and Steven Tomczyk (High Altitude Observatory) measured what is called the chromospheric flash spectrum.
The chromospheric temperature, however, changes in a completely unexpected way: above the temperature minimum, it begins to rise to as high as 25,000 K at the top of the chromospheric layer.
"It would be difficult for us to distinguish such purposeful, nefarious camouflage from naturally occurring chromospheric lines.
(2007) Chromospheric Alfvenic waves strong enough to power the solar wind.
All these observations stimulated the modeling of KH instability in moving twisted magnetic flux tubes in nonmagnetic environment [62], in magnetic tubes of partially ionized plasma [63], in spicules [64-66], in photospheric tubes [67], in high-temperature and cool surges [68, 69], in dark mottles [70], at the boundary of rising coronal mass ejections [60, 61, 71, 72], in rotating, tornado-like magnetized jets [49], and in a chromospheric jet (fast disappearance of rapid red-shifted and blue-shifted excursions alongside a larger scale H[alpha] jet) [73].
(iii) In between, there is a transition from predominantly chromospheric to transition region radiation and finally to predominantly coronal emission.
Such a model can account for the presence of both He I and He II emission lines in the chromospheric spectrum [27].
[19] that is made between a photospheric and a chromospheric line.
On Aug 8 a spectacular 'horned' dark filament graced the SE quadrant which was still present the following day, matching the alignment of chromospheric disturbance in the SW quadrant.
They cover interior, convection, and dynamo, the formation and evolution of sunspots and active regions; flux emergence and submergence; waves, reconnection, and chromospheric and coronal heating; magnetic fields as structuring agents of the solar atmosphere; flares, eruptions, and particle acceleration; solar wind and the interplanetary space; and Hinode and Solar Dynamics Observatory.