Measurement of the Solar Limb Brightness Profile at 3 MM During the Total Eclipse of 1991 July 11

Details Measurement of the Solar Limb Brightness Profile at 3 MM During the Total Eclipse of 1991 July 11 Measurement of the Solar Limb Brightness Profile at 3 MM During the Total Eclipse of 1991 July 11

May 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aas...180.4202b&link_type=abstract

American Astronomical Society, 180th AAS Meeting, #42.02; Bulletin of the American Astronomical Society, Vol. 24, p.796

Astronomy and Astrophysics

Astronomy

Scientific paper

We observed the solar limb at the point of first contact during the eclipse of 1991 July 11, with a spatial resolution ~ 1.6''. The observations were carried out at the Owens Valley Radio Observatory millimeter interferometer, operating at 3 millimeters. The visibility amplitude and phase were modeled to yield the height of the 3 mm limb above the visible photosphere, and the data were differentiated to yield the brightness profile of the limb in strips ~ 1.6'' wide. We found that the 3 mm limb extends 7.5+/-0.8'' or 5500 km above the visible photosphere, with no evidence of a limb spike. This result, and the overall shape of the limb profile, are similar to the interferometric results of Wannier, Hurford, & Seielstad (1983) obtained with the same intrument but without the benefit of an eclipse. The 3 mm limb, at a temperature of ~ 7200 K, extends to altitudes far beyond the expected location of the transition region in the model of Vernazza, Avrett, & Loeser (1981). A comparison of the 3 mm profile and an offband Hα photograph of the limb reveals a close correspondence between the 3 mm limb and the height of Hα spicules.

Affiliated with

Also associated with

No associations

Rating

Measurement of the Solar Limb Brightness Profile at 3 MM During the Total Eclipse of 1991 July 11 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 Measurement of the Solar Limb Brightness Profile at 3 MM During the Total Eclipse of 1991 July 11, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the Solar Limb Brightness Profile at 3 MM During the Total Eclipse of 1991 July 11 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1512960