Research output: Contribution to journal › Article › peer-review
Sunspot Observations at the Eimmart Observatory: Revision and Supplement. / Вохмянин, Михаил Владимирович; Золотова, Надежда Валерьевна.
In: Solar Physics, Vol. 298, No. 10, 113, 01.10.2023.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Sunspot Observations at the Eimmart Observatory: Revision and Supplement
AU - Вохмянин, Михаил Владимирович
AU - Золотова, Надежда Валерьевна
PY - 2023/10/1
Y1 - 2023/10/1
N2 - Digital images of sunspot drawings of the archives of Georg Christoph Eimmart stored at the National Library of Russia, St. Petersburg, are analyzed to obtain sunspot-group numbers and sunspot areas as well as heliographic positions. Overall, more than a hundred drawings were processed. The impact of drawing and reproduction uncertainties and the aims of historical observations are considered. The sunspot positions are compared to those reported by contemporary observers of the Maunder minimum. The restored sunspot-group numbers and latitudes are compared to those extracted by Hoyt and Schatten (Solar Phys. 179, 189, 1998) as well as Hayakawa et al. (Solar Phys. 296, 154, 2021b) and Hayakawa et al. (Astrophys. J. 909, 166, 2021d). The persistence of long-lived sunspots over several solar rotations is discussed.
AB - Digital images of sunspot drawings of the archives of Georg Christoph Eimmart stored at the National Library of Russia, St. Petersburg, are analyzed to obtain sunspot-group numbers and sunspot areas as well as heliographic positions. Overall, more than a hundred drawings were processed. The impact of drawing and reproduction uncertainties and the aims of historical observations are considered. The sunspot positions are compared to those reported by contemporary observers of the Maunder minimum. The restored sunspot-group numbers and latitudes are compared to those extracted by Hoyt and Schatten (Solar Phys. 179, 189, 1998) as well as Hayakawa et al. (Solar Phys. 296, 154, 2021b) and Hayakawa et al. (Astrophys. J. 909, 166, 2021d). The persistence of long-lived sunspots over several solar rotations is discussed.
KW - Observations
KW - Solar cycle
KW - Sunspots
UR - https://link.springer.com/article/10.1007/s11207-023-02208-4?utm_source=xmol&utm_medium=affiliate&utm_content=meta&utm_campaign=DDCN_1_GL01_metadata
UR - https://www.mendeley.com/catalogue/cdd748e4-c979-324e-962f-6d0dfe7ccf92/
U2 - 10.1007/s11207-023-02208-4
DO - 10.1007/s11207-023-02208-4
M3 - Article
VL - 298
JO - Solar Physics
JF - Solar Physics
SN - 0038-0938
IS - 10
M1 - 113
ER -
ID: 111482582