Measurements and an empirical model of the Zodiacal brightness as observed by the Solar Mass Ejection Imager (SMEI)
Autor: | Mario M. Bisi, John M. Clover, Andrew Buffington, P. Paul Hick, Bernard V. Jackson, S. D. Price, Thomas A. Kuchar |
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Rok vydání: | 2016 |
Předmět: |
Physics
Brightness Solar mass Zodiacal light 010504 meteorology & atmospheric sciences media_common.quotation_subject Ecliptic Astronomy Astronomy and Astrophysics Astrophysics 01 natural sciences Photometry (optics) Stars Space and Planetary Science Sky Sidereal time 0103 physical sciences 010303 astronomy & astrophysics 0105 earth and related environmental sciences media_common |
Zdroj: | Icarus. 272:88-101 |
ISSN: | 0019-1035 |
DOI: | 10.1016/j.icarus.2016.02.045 |
Popis: | The Solar Mass Ejection Imager (SMEI) provided near-full-sky broadband visible-light photometric maps for 8.5 years from 2003 to 2011. At a cadence of typically 14 maps per day, these each have an angular resolution of about 0.5o and differential photometric stability of about 1% throughout this time. When individual bright stars are removed from the maps and an empirical sidereal background subtracted, the residue is dominated by the zodiacal light. This sky coverage enables the formation of an empirical zodiacal-light model for observations at 1 AU which summarizes the SMEI data. When this is subtracted, analysis of the ensemble of residual sky maps sets upper limits of typically 1% for potential secular change of the zodiacal light for each of nine chosen ecliptic sky locations. An overall long-term photometric stability of 0.25% is certified by analysis of three stable sidereal objects. Averaging the nine ecliptic results together yields a 1-σ upper limit of 0.3% for zodiacal light change over this 8.5 year period. |
Databáze: | OpenAIRE |
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