Broadband Measurements of Facular Photometric Contrast Using the Solar Bolometric Imager

Details Broadband Measurements of Facular Photometric Contrast Using the Solar Bolometric Imager Broadband Measurements of Facular Photometric Contrast Using the Solar Bolometric Imager

Aug 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...611l..57f&link_type=abstract

The Astrophysical Journal, Volume 611, Issue 1, pp. L57-L60.

Astronomy and Astrophysics

Astronomy

14

Sun: Solar-Terrestrial Relations, Sun: Activity, Sun: Faculae, Plages, Sun: Magnetic Fields, Sun: Photosphere

Scientific paper

We present the first photometric measurements of solar faculae in broadband light. Our measurements were made during the recent flight of the Solar Bolometric Imager (SBI), a 30 cm balloon-borne telescope that imaged the Sun with a spectrally constant response between about 0.31 and 2.6 μm. Our curve of facular contrast versus limb distance agrees well with values obtained by the blackbody correction of monochromatic measurements. This decreases uncertainty in the facular irradiance contribution, which limits searches for other possible mechanisms of solar luminosity variation, besides changes of photospheric magnetism.

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