TY - CONF

T1 - Sunspot observations in the beginning of the seventeenth century

AU - Вохмянин, Михаил Владимирович

AU - Золотова, Надежда Валерьевна

PY - 2018

Y1 - 2018

N2 - One of the early sunspot observers of the sunspots using a telescope was Galileo Galilei. Here, we analyse his original manuscripts, which were not mentioned in the Hoyt and Schatten database of the sunspot group numbers. Handwritten documents contains 107 drawings of the solar disc in 1612 and 1613. Several drawings were later printed in the book Istoria published in 1613. Another source of data on sunspots on the eve of Maunder minimum are the drawings in the 1630s made by Pierre Gassendi. First of all, these observations intrigue the solar community by the fact that even before the start of the Maunder minimum the spots tend to appear in the southern hemisphere. We present the preliminary results on the extraction of the number of groups, their heliographic positions and area. We also discuss discrepancies between manuscripts and published books.

AB - One of the early sunspot observers of the sunspots using a telescope was Galileo Galilei. Here, we analyse his original manuscripts, which were not mentioned in the Hoyt and Schatten database of the sunspot group numbers. Handwritten documents contains 107 drawings of the solar disc in 1612 and 1613. Several drawings were later printed in the book Istoria published in 1613. Another source of data on sunspots on the eve of Maunder minimum are the drawings in the 1630s made by Pierre Gassendi. First of all, these observations intrigue the solar community by the fact that even before the start of the Maunder minimum the spots tend to appear in the southern hemisphere. We present the preliminary results on the extraction of the number of groups, their heliographic positions and area. We also discuss discrepancies between manuscripts and published books.

M3 - Abstract

Y2 - 20 August 2018 through 31 August 2018

ER -