Chromospheric Heating by Acoustic Waves Compared to Radiative Cooling. II. Revised Grid of Models

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00533755" target="_blank" >RIV/67985815:_____/20:00533755 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.3847/1538-4357/ab665f" target="_blank" >https://doi.org/10.3847/1538-4357/ab665f</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/1538-4357/ab665f" target="_blank" >10.3847/1538-4357/ab665f</a>

Result language
angličtina
Original language name
Chromospheric Heating by Acoustic Waves Compared to Radiative Cooling. II. Revised Grid of Models
Original language description
Acoustic and magnetoacoustic waves are considered to be possible agents of chromospheric heating. We present a comparison of deposited acoustic energy flux with total integrated radiative losses in the middle chromosphere of the quiet Sun and a weak plage. The comparison is based on a consistent set of high-resolution observations acquired by the Interferometric Bidimensional Spectrometer instrument in the Ca II 854.2 nm line. The deposited acoustic-flux energy is derived from Doppler velocities observed in the line core and a set of 1737 non-local thermodynamic equilibrium 1D hydrostatic semi-empirical models, which also provide the radiative losses. The models are obtained by scaling the temperature and column mass of five initial models by Vernazza et al. (1981, VAL) B-F to get the best fit of synthetic to observed profiles. We find that the deposited acoustic-flux energy in the quiet-Sun chromosphere balances 30%-50% of the energy released by radiation. In the plage, it contributes by 50%-60% in locations with vertical magnetic field and 70%-90% in regions where the magnetic field is inclined more than 50 degrees to the solar surface normal.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GC18-08097J" target="_blank" >GC18-08097J: Quiet-Sun Magnetic Fields and Newly Emerging Flux – Dynamics, Energetics, and Upper Atmospheric Response</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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