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Extreme limb profiles of the sun at far-infrared and submillimeter wavelengths

1986; IOP Publishing; Volume: 308; Linguagem: Inglês

10.1086/164515

1538-4357

C. Lindsey, E. E. Becklin, F. Q. Orrall, M. W. Werner, J. T. Jefferies, I. Gatley,

Solar Radiation and Photovoltaics

view Abstract Citations (30) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Extreme Limb Profiles of the Sun at Far-Infrared and Submillimeter Wavelengths Lindsey, C. ; Becklin, E. E. ; Orrall, F. Q. ; Werner, M. W. ; Jefferies, J. T. ; Gatley, I. Abstract 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 July 31, 1981, 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. Publication: The Astrophysical Journal Pub Date: September 1986 DOI: 10.1086/164515 Bibcode: 1986ApJ...308..448L Keywords: Chromosphere; Far Infrared Radiation; Limb Brightening; Solar Eclipses; Solar Limb; Solar Radiation; Submillimeter Waves; Sun; Data Acquisition; Mathematical Models; Solar Temperature; Solar Physics; INFRARED: SPECTRA; LINE PROFILES; SUN: CHROMOSPHERE; SUN: LIMB DARKENING; SUN: SPECTRA full text sources ADS |