NDLI: Energy transport below sunspots and faculae

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Energy transport below sunspots and faculae

Content Provider	NASA Technical Reports Server (NTRS)
Author	Schatten, Kenneth H. Mayr, Hans G.
Copyright Year	1990
Description	Sunspots and faculae were modeled using a modified stellar envelope code. Downflow velocities of 50 m/sec can achieve a 1,000 K drop in the surface temperature of the photosphere and reduce the surface irradiance to half its value. Concurrently, a 600 km Wilson depression forms that is associated with the enhanced density of the cooler gases. Similar upflow velocities provide for slightly enhanced temperatures and 150 km uplifted surfaces for faculae. The calculations show that, to first approximation, sunspot and facular structures (in density, temperature and pressure) can be obtained by simply vertically shifting the undisturbed photospheric materials to form wells and hillock geometries, respectively. However, the chromospheric manifestations of these features can be quite different owing to the influence of the magnetic field and flow.
File Size	481234
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910003151
Archival Resource Key	ark:/13960/t1gj4d641
Language	English
Publisher Date	1990-08-01
Access Restriction	Open
Subject Keyword	Solar Physics Chromosphere Faculae Surface Temperature Magnetic Effects Irradiance Photosphere Stellar Envelopes Advection Gas Cooling Sunspots Energy Transfer Solar Magnetic Field Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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