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Title: ENIGMA OF THE SOLAR CYCLE 4 STILL NOT RESOLVED

Abstract

In this paper, the problem of the unusually long 4th sunspot cycle is discussed: was the length of this cycle exceptionally large or really composed of two short cycles? Analyzing the latitude-time diagram in 1784-1798, reconstructed from the drawings by Staudacher, Hamilton, and Gimingham, we suggest that the 4th cycle length can be a result of an impulse of activity in the northern hemisphere during the descending phase. The local minimum in 1793 can be just a gap between impulses of the solar activity, similar to the declining phase in the southern hemisphere of the long cycle 20. The long declining phase of cycle 4 is that the minimum in 1793 may also be due to lack of data. We have shown that sparse observations of the sunspots, in the second half of cycle 4, do not prove the existence of the 'lost' tiny cycle from 1793 to 1800.

Authors:
;  [1]
  1. Institute of Physics, St. Petersburg State University, 198504 St. Petersburg (Russian Federation)
Publication Date:
OSTI Identifier:
21578252
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 736; Journal Issue: 2; Other Information: DOI: 10.1088/0004-637X/736/2/115; Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; SOLAR CYCLE; SUN; SUNSPOTS; MAIN SEQUENCE STARS; SOLAR ACTIVITY; STARS; STARSPOTS; STELLAR ACTIVITY

Citation Formats

Zolotova, N. V., and Ponyavin, D. I., E-mail: ned@geo.phys.spbu.ru. ENIGMA OF THE SOLAR CYCLE 4 STILL NOT RESOLVED. United States: N. p., 2011. Web. doi:10.1088/0004-637X/736/2/115.
Zolotova, N. V., & Ponyavin, D. I., E-mail: ned@geo.phys.spbu.ru. ENIGMA OF THE SOLAR CYCLE 4 STILL NOT RESOLVED. United States. doi:10.1088/0004-637X/736/2/115.
Zolotova, N. V., and Ponyavin, D. I., E-mail: ned@geo.phys.spbu.ru. Mon . "ENIGMA OF THE SOLAR CYCLE 4 STILL NOT RESOLVED". United States. doi:10.1088/0004-637X/736/2/115.
@article{osti_21578252,
title = {ENIGMA OF THE SOLAR CYCLE 4 STILL NOT RESOLVED},
author = {Zolotova, N. V. and Ponyavin, D. I., E-mail: ned@geo.phys.spbu.ru},
abstractNote = {In this paper, the problem of the unusually long 4th sunspot cycle is discussed: was the length of this cycle exceptionally large or really composed of two short cycles? Analyzing the latitude-time diagram in 1784-1798, reconstructed from the drawings by Staudacher, Hamilton, and Gimingham, we suggest that the 4th cycle length can be a result of an impulse of activity in the northern hemisphere during the descending phase. The local minimum in 1793 can be just a gap between impulses of the solar activity, similar to the declining phase in the southern hemisphere of the long cycle 20. The long declining phase of cycle 4 is that the minimum in 1793 may also be due to lack of data. We have shown that sparse observations of the sunspots, in the second half of cycle 4, do not prove the existence of the 'lost' tiny cycle from 1793 to 1800.},
doi = {10.1088/0004-637X/736/2/115},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 736,
place = {United States},
year = {2011},
month = {8}
}