Precision (±0.005%) Quiet Sun Limb Darkening Scans Show E-W Vs N-S Chords Same.

Details Precision (±0.005%) Quiet Sun Limb Darkening Scans Show E-W Vs N-S Chords Same. Precision (±0.005%) Quiet Sun Limb Darkening Scans Show E-W Vs N-S Chords Same.

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aas...21115906l&link_type=abstract

American Astronomical Society, AAS Meeting #211, #159.06

Astronomy and Astrophysics

Astronomy

Scientific paper

Using the 80-cm McMath-Pierce image, we compare equatorial and meridian limb darkening and find they are identical. Observations consist of 20 scans over 30 minutes at 15648 Å (H- opacity minimum) and 34168 Å continua. Noise is sky and disk structure limited. System noise is negligible at ± 0.005%; disk structure noise is ± 0.03% at 15648 Å 0.02% at 34168 Å. Our next step will be to compare these limb darkening results with those predicted by solar models. Ref: Livingston & Sheeley, 2008, ApJ 672 no.1, in press.

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