التفاصيل البيبلوغرافية
| العنوان: |
Sky Brightness Evaluation and First Coronal Signal Detection from Concordia Base (Antarctica) with a Calibrated Micropolarizer Array Camera. |
| المؤلفون: |
Liberatore, Alessandro, Capobianco, Gerardo, Fineschi, Silvano, Massone, Giuseppe, Zangrilli, Luca, Susino, Roberto, Nicolini, Gianalfredo |
| المصدر: |
Solar Physics; Oct2023, Vol. 298 Issue 10, p1-17, 17p |
| مصطلحات موضوعية: |
SKY brightness, SOLAR magnetic fields, SIGNAL detection, SOLAR atmosphere, SEA level, SOLAR corona, DAYLIGHT |
| مصطلحات جغرافية: |
HAWAII, ANTARCTICA |
| مستخلص: |
The solar corona is the outer layer of the Sun's atmosphere. The brightness of the solar corona is a million times lower than that of the solar disk. The Earth's sky brightness itself is high enough to cover the coronal signal during ground-based observations. For this reason, the study of sky characteristics plays a fundamental role in observing the solar corona. To date, the only place with the sky characteristics that allow continuous coronagraphic measurements from Earth is at the MLO (Mauna Loa Observatory; Hawaii, ≈ 3400 m above sea level). This paper shows the results obtained as part of the "Extreme Solar Coronagraphy Antarctic Program Experiment" (ESCAPE) at Concordia Base, Antarctica (Dome C plateau-coord.: 75∘06′ S, 123∘20′ E, ≈ 3300 m above sea level) during the 37th campaign and gives a summary of all the sky-brightness measurements obtained from this site (34th and 35th campaigns). Dome C is confirmed to be a coronagraphic site with a sky brightness of about 1 × 10 − 6 B ⊙ . For the first time, it was also possible to detect a coronal signal and to compare it with what was measured by the COronal Solar Magnetism Observatory (COSMO) K-coronagraph (K-Cor) at the MLO. All these results were obtained by using a micropolarizer camera mounted within a coronagraph designed for Antarctic environments. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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