Solar limb brightening in submillimeter wavelengths

Details Solar limb brightening in submillimeter wavelengths Solar limb brightening in submillimeter wavelengths

Feb 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...203..753l&link_type=abstract

Astrophysical Journal, vol. 203, Feb. 1, 1976, pt. 1, p. 753-759.

Astronomy and Astrophysics

Astrophysics

18

Brightness Temperature, Chromosphere, Luminous Intensity, Solar Limb, Submillimeter Waves, Astronomical Models, Atmospheric Models, Infrared Radiation, Scale Height, Solar Atmosphere, Solar Granulation

Scientific paper

Differential two-beam scans of the sun in submillimeter wavelengths (350 microns to 1 millimeter) indicate limb brightening approaching 1 percent when the cosine of the angle from the normal equals 0.60. The observations also show considerable chromospheric structure, both in active and quiet regions, but with less relative amplitude than at millimeter and centimeter wavelengths. The limited angular resolution of the observing system, together with photometric errors due to fluctuating atmospheric transparency, make the brightness profile of the extreme limb uncertain. The observed degree of limb brightening is considerably less than that consistent with spherically symmetric model atmospheres based on continuum brightness-temperature measurements. The suppression of limb brightening suggests the existence of irregular granular structure with both horizontal and vertical characteristic sizes of the order of 1500 km. High-resolution images in the wings of the K-line show granular structure of about this horizontal scale.

Affiliated with

Also associated with

No associations

Rating

Solar limb brightening in submillimeter wavelengths does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Solar limb brightening in submillimeter wavelengths, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar limb brightening in submillimeter wavelengths will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1297432