Study of possible subsurface influences on the emerging active regions

Baranyi, T.; Ludmány, A.

doi:10.1007/bf00159151

Cited by 4 publications

(2 citation statements)

References 19 publications

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“…Sunspot areas are important parameters for lots of studies in various fields of solar physics: growth and decay of spots (Lustig & Wo Èhl 1995), emergence of fluxes in spots (Baranyi & Ludma Âny 1992), evolution of sunspot groups and interaction between them (van Driel-Gesztelyi et al 1993), axial tilt and rotation rate of groups (Howard 1991(Howard , 1992, periodicities in solar activity (Oliver & Ballester 1995), fragmentation of flux tubes (Ludma Âny, Baranyi & Mezo } 1999) and irradiance variability (Fro Èhlich et al 1991).…”

Section: Introductionmentioning

confidence: 99%

Comparison of sunspot area data bases

Baranyi

Györi²,

Ludmány

et al. 2001

Monthly Notices of the Royal Astronomical Society

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Sunspot area measurements play an important role in the studies of sunspot groups and variations in solar irradiance. However, the measured areas may be burdened with systematic and random errors, which may affect the results in these fields. Mainly the total solar irradiance models can be improved by using more precise area data. In order to choose the most appropriate area data for a given study or create a homogeneous composite area data base, there is a need to compare the sunspot areas provided by different observatories. In this study we statistically investigated all the available corrected sunspot area data bases for the years 1986 and 1987. We find that the photographic data bases are in good agreement with each other but there are important systematic differences between the photographic and sunspot drawings data bases. We give the characteristic parameters for the systematic and random errors as well as the possible reasons for them.

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Section: Introductionmentioning

confidence: 99%

Comparison of sunspot area data bases

Baranyi

Györi²,

Ludmány

et al. 2001

Monthly Notices of the Royal Astronomical Society

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“…The giant cells were found in simulations by Gilman & Glatzmaier (1984). Its observational detection, however, remained difficult and results are not yet conclusive (Baranyi & Ludmány 1992;Beck et al 1998;Hathaway et al 2000) because, if these cells exist, they should be present in deeper layers. The ratio of inverse Rossby number, i.e.…”

Section: Discussion Of Variations About Maximamentioning

confidence: 99%

Cycle dependence of the longitudinal-latitudinal sunspot motion correlations

Muraközy¹,

Ludmány²

2008

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Aims. It is well known that the azimuthal and meridional shifts of sunspots are correlated and that the correlation exhibits a latitudinal distribution, which is expected due to the Coriolis effect. We study the temporal behaviour of this latitudinal distribution. Methods. We analyze the daily positions of sunspot groups, provided by the Debrecen Photoheliographic Data and the Greenwich Photoheliographic Results and correlation values, which were mapped in 5• latitudinal bins. The latitudinal distributions were examined for each year. Results. We derive a sunspot-motion correlation that exhibits a Coriolis-type latitudinal distribution on long timescales, which are typical for the yearly distributions; at cycle maximum, however, unexpected distortions can occur. Conclusions. The causes of the weakening of the Coriolis-pattern remain unclear. Possible relations of the phenomenon to the Gnevyshev-gap, the polarity reversal of the main magnetic field, and some mid-period fluctuations are discussed.

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Development of a Code to Analyze the Solar White-Light Images from the Kodaikanal Observatory: Detection of Sunspots, Computation of Heliographic Coordinates and Area

2016

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Mercury monohalides are promising candidates for electron electric dipole moment searches. This is due to their extremely large values of effective electric fields, besides other attractive experimental features. We have elucidated the theoretical reasons of our previous work. We have also presented a detailed analysis of our calculations, by including the most important of the correlation effects' contributions. We have also analyzed the major contributions to the effective electric field, at the Dirac-Fock level, and identified those atomic orbitals' mixings that contribute significantly to it.

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Study of possible subsurface influences on the emerging active regions

Cited by 4 publications

References 19 publications

Comparison of sunspot area data bases

Comparison of sunspot area data bases

Cycle dependence of the longitudinal-latitudinal sunspot motion correlations

Development of a Code to Analyze the Solar White-Light Images from the Kodaikanal Observatory: Detection of Sunspots, Computation of Heliographic Coordinates and Area

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