Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Edwin J. Reichmann"'
Publikováno v:
The Astrophysical Journal. 589:665-670
Sunspots appear on the Sun in two bands on either side of the equator that drift toward lower latitudes as each sunspot cycle progresses. We examine the drift of the centroid of the sunspot area toward the equator in each hemisphere from 1874 to 2002
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93bb6469f0f330e16411b37acf91cba5
https://doi.org/10.1086/374393
https://doi.org/10.1086/374393
Publikováno v:
Solar Physics. 211:357-370
We examine the "Group" sunspot numbers constructed by Hoyt and Schatten to determine their utility in characterizing the solar activity cycle. We compare smoothed monthly Group Sunspot Numbers to Zurich (International) Sunspot Numbers, 10.7-cm radio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aefbd6dd52c828a835a15cc571ccded6
https://doi.org/10.1023/a:1022425402664
https://doi.org/10.1023/a:1022425402664
Publikováno v:
Journal of Geophysical Research: Space Physics. 104:22375-22388
A number of techniques currently in use for predicting solar activity on a solar cycle timescale are tested with historical data. Some techniques, e.g., regression and curve fitting, work well as solar activity approaches maximum and provide a month-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41988c68b7c0e26d7a13229d9bc69176
https://doi.org/10.1029/1999ja900313
https://doi.org/10.1029/1999ja900313
Autor:
M. G. Rovira, Einar Tandberg-Hanssen, Brigitte Schmieder, G. M. Simnett, Mona J. Hagyard, Edwin J. Reichmann, Pascal Démoulin
Publikováno v:
The Astrophysical Journal. 510:474-484
We have analyzed an active region which was observed in H.alpha (Multichannel Subtractive Double Pass Spectrograph), in UV lines (SMM/UVSP), and in X-rays (SMM/HXIS). In this active region there were only a few subflares and many small bright points
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::562738f1a4210a27378bf302d29d0c46
https://doi.org/10.1086/306566
https://doi.org/10.1086/306566
Publikováno v:
Journal of Geophysical Research: Space Physics. 103:17411-17418
On the basis of the lowest observed smoothed monthly mean sunspot number, cycle 23 appears to have conventionally begun in May 1996, in conjunction with the first appearance of a new cycle, high-latitude spot-group. Such behavior, however, is conside
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61abf6ad770463cd295853638ca91463
https://doi.org/10.1029/98ja01434
https://doi.org/10.1029/98ja01434
Publikováno v:
Journal of Geophysical Research: Space Physics. 103:6595-6603
The first occurrence of a high-latitude, new cycle spot group for cycle 23 was in May 1996, in conjunction with a minimum in the smoothed monthly mean sunspot number. Since then, new cycle spot groups have become more predominant, and the smoothed mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7f2349fae1f09bb0726422111ed2fde
https://doi.org/10.1029/97ja02777
https://doi.org/10.1029/97ja02777
Publikováno v:
Journal of Geophysical Research: Space Physics. 101:19967-19972
The decline of cycle 22 is shown to be consistent with the notion that it will have a period
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::415cd7047b23b6c664720f7f9306ac44
https://doi.org/10.1029/96ja01820
https://doi.org/10.1029/96ja01820
Publikováno v:
Solar Physics. 151:177-190
The temporal behavior of a sunspot cycle, as described by the International sunspot numbers, can be represented by a simple function with four parameters: starting time, amplitude, rise time, and asymmetry. Of these, the parameter that governs the as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6ca0e5065d3c4aade05bf1fa32c8918
https://doi.org/10.1007/bf00654090
https://doi.org/10.1007/bf00654090
Publikováno v:
Journal of Astrophysics and Astronomy. 11:277-280
The photometric variability of the Ap star HD 10783 = UZ Psc is discussed. New UBV photometry, obtained between late 1965 and early 1969, is presented and it is combined with existing published photometry to derive an improved ephemeris for times of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64c4793cdfa68d393c7bc22a35084fa4
https://doi.org/10.1007/bf02709277
https://doi.org/10.1007/bf02709277
Erratum: 'Evidence that a Deep Meridional Flow Sets the Sunspot Cycle Period' (ApJ, 589, 665 [2003])
Publikováno v:
The Astrophysical Journal. 602:543-543
An error was made in entering the data used in Figure 6. This changes the results concerning the length of the time lag between the variations in the meridional flow speed and those in the cycle amplitude. The final paragraph on page 667 should read:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::171bdf7857bb3e21ead3df4b8ab78634
https://doi.org/10.1086/379790
https://doi.org/10.1086/379790