On the facular contrast near the solar limb

Journal Article · Sun Dec 15 04:00:00 EST 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163772· OSTI ID:5802252

Libbrecht, K G; Kuhn, J R

We present an improved measurement of the continuum contrast of solar faculae in wavelength bands centered at 800 and 525 nm. Our findings confirm our earlier result that near the extreme solar limb the contrast decreases with decreasing distance to the limb. Parametrizing the contrast function with ..delta..I/I = 0.2+..cap alpha..(..mu..-0.2) over the range 0.08< or =..mu..< or =0.2, where ..mu.. is the cosine of the heliocentric angle, we obtain the best-fit values of ..cap alpha..: ..cap alpha../sub red/ = 0.25 +- 0.10, ..cap alpha../sub green/ = 0.30 +- 0.10.

• Research Organization: Solar Astronomy, California Institute of Technology
• OSTI ID: 5802252
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 299:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics &amp; Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DATA ANALYSIS
FACULAE
RADIATION FLUX
RADIATIONS
SOLAR ACTIVITY
SOLAR RADIATION
SPECTRA
STELLAR RADIATION
VISIBLE SPECTRA