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Extreme limb profiles of the sun at far-infrared and submillimeter wavelengths
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Becklin, E. E. Werner, M. W. Gatley, I. Jefferies, J. T. Lindsey, C. Orrall, F. Q. |
| Copyright Year | 1986 |
| Description | Thirty, 50, 100, and 200 microns solar limb intensity profiles determined with arcsecond resolution from airborne observations of the occultation of the solar limb during the total eclipse of 1981 July 31 are presented. Two points of particular importance emerge: (1) the longer-wavelength (100 and 200 micron) limbs are significantly brighter than disk center. At 200 microns the extreme limb is about 1.22 times the brightness of disk center. This is consistent with the 6000 K temperature-plateau structure of the model chromospheres of Vernazza, Avrett, and Loeser (1973, Ap. J., 184, 605; 1981; Ap. J. Suppl., 45, 635;) and (2) the longer wavelength limbs are extended significantly further above the visible limb than Vernazza, Avrett, and Loeser predict. These results provide a strong basis for modeling of the solar chromosphere free from the assumption of gravitational-hydrostatic equilibrium. |
| File Size | 993213 |
| Page Count | 42 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860022903 |
| Archival Resource Key | ark:/13960/t4zh1hp47 |
| Language | English |
| Publisher Date | 1986-06-01 |
| Access Restriction | Open |
| Subject Keyword | Astronomy Solar Eclipses Far Infrared Radiation Limb Brightening Chromosphere Solar Temperature Solar Limb Data Acquisition Submillimeter Waves Mathematical Models Solar Radiation Sun Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
