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Author name code: ludmany
ADS astronomy entries on 2022-09-14
author:"Ludmany, Andrasz"
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Title: Instrumental profile of the Debrecen solar spectrograph
Authors: Murakozy, J.; Vince, I.; Ludmany, A.
2003SerAJ.167...81M Altcode:
The solar spectrograph of the Heliophysical Observatory at Debrecen,
Hungary, was investigated to determine its instrumental profile. The
measurements were made by using a HeNe laser beam. The widths and
asymmetries of the profiles decrease toward higher spectral orders,
the most advantageous orders being the third and the fourth ones. To
eliminate the broadening of solar lines on account of the instrumental
profile, the straightforward iteration method of Gurtovenko has been
applied. The efficiency of the method is demonstrated by the simulation
of the broadened and corrected spectral line profiles.
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Title: Debrecen Photoheliographic Data for 1987 with image supplements
Authors: Gyori, L.; Baranyi, T.; Csepura, G.; Gerlei, O.; Ludmany, A.
2000JAD.....6....1G Altcode:
The present catalogue is the second volume of the Debrecen
Photoheliographic Data (DPD). The DPD is a catalogue of daily positions
and areas of sunspots compiled by using white-light full-disk
observations taken at the Heliophysical Observatory (Debrecen,
Hungary) and its Gyula Observing Station as well as at some other
observatories. In 1987 the contributing observatories were: Abastumani
Astrophysical Observatory (Georgia), Ebro Observatory (Spain), Kiev
University Observatory (Ukraine), Kislovodsk Observing Station of
Pulkovo Observatory (Russia), Kodaikanal Solar Observatory (India)
and Tashkent Observatory (Uzbekistan). The material is divided in two
parts. The numerical part contains the measured data and the other
part contains the CCD scans of all the active regions that were found
on the photographic plates. Every measured spot is marked with the
same number in the picture as in the numerical catalogue. The images
along with the measured data allow more complex analyses, morphological
studies and comparison with magnetic, Hα and other observations.
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Title: Efficiency factors in the solar-troposheric relations
Authors: Baranyi, T.; Ludmany, A.
2000lstv.conf...69B Altcode:
No abstract at ADS
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Title: Debrecen Photoheliographic Data for 1986 with image supplements
Authors: Györi, L.; Baranyi, T.; Csepura, G.; Gerlei, O.; Ludmany, A.
1998JAD.....4....2G Altcode: 1998JAD.....4.....G
The Debrecen Photoheliographic Data (DPD) is a catalogue of daily
positions and areas of sunspots compiled by using white-light full-disk
observations taken at the Heliophysical Observatory (Debrecen, Hungary)
and its Gyula Observing Station as well as at Kislovodsk (Russia). The
present material is divided in two parts. The numerical part contains
the measured data and the other part contains the CCD scans of all
the active regions on the photographic plates. Every measured spot
is marked with the same number in the picture as in the numerical
catalogue. The images along with the measured data allow more complex
analyses, morphological studies and the comparison with magnetic,
Hα and other observations.
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Title: Some Polarity Conditions in Corpuscular Events
Authors: Baranyi, T.; Ludmany, A.
1997SoPh..173..383B Altcode:
We present some refinements of the previously reported magnetic
polarity conditions in solar-terrestrial relations. Appropriately
selected subsets were used from the longest available data sets,
the geomagnetic aa-index and the surface air temperature. The solar
corpuscular impacts have conspicuous effects in the tropospheric
behaviour. We reported previously a new kind of semi-annual fluctuation
and opposite tropospheric responses to the effects coming from different
regions of the Sun as well as their dependence on the orientation of the
solar main magnetic dipole. It is shown in the present paper that the
semi-annual fluctuation governed by shock and fluctuating disturbances
(which originate from the lower-latitude solar regions) exhibits sign
reversals in consecutive cycles. The effect can be detected only in
the absence of recurrent disturbances (coming mainly from the polar
regions). This complex phenomenon implies that the corpuscular events
may preserve some of their polarity conditions of their specific
solar origin even at the Earth's distance, and on the other hand the
small-scale structure of the IMF plays an important role in the link
between the solar particles and the tropospheric response.
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Title: Some Particle Effects in the Solar- Terrestrial Relations
Authors: Baranyi, T.; Ludmany, A.
1996ASPC...95..489B Altcode: 1996sdit.conf..489B
The distinction of the roles of photons and particles is of crucial
importance in understanding the real processes in Sun-weather relations,
so these channels have to be separated. The specific impact of the
solar corpuscular radiation on the terrestrial atmosphere can be
pointed out in different ways: on the one hand, the similarity of
an effect to a well known particle effect may give a hint, and on
the other hand, if any solar-terrestrial phenomenon or regularities
exhibited dependence on the polarity conditions of solar magnetic
fields, then it might be regarded as a signature of some particle
effect. By using the aa-index of geomagnetic activity as well as surface
temperature data of 129 European stations, the following results
have been obtained: 1.) The efficiency of the solar impact exhibits
semiannual fluctuation; 2.) Disturbances coming from the Sun's polar
and equatorial regions release opposite meteorological responses;
3.) Both previous regularities depend on the polarity of the Sun's
main magnetic dipole field. The whole complex phenomena depends on the
geographical position; in the present material it is mainly confined to
European middle latitudes - this may hint at some indirect mechanisms,
probably through affecting atmospheric circulation.
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Title: Distinction between the climatic effects of the solar
corpuscular and electromagnetic radiation
Authors: Baranyi, T.; Ludmany, A.
1994SoPh..152..297B Altcode: 1994svs..coll..297B; 1994IAUCo.143..297B
We study the possibilities of the separation of solar electromagnetic
and corpuscular impacts on the terrestrial lower atmosphere by examining
their characteristic differences. We focus on the behaviour of the
solar-meteorological correlation with respect to characteristic magnetic
properties. Examples are given that the solar meteorological correlation
- the efficiency of the solar impact - depends on the Sun-Earth
attitude, the polarity of the solar main dipole field (and IMF)
and the type of the geomagnetic events. This can explain the virtual
disappearance or reversal of certain solar-meteorological effects.
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Title: Study of Possible Subsurface Influences on the Emerging
Active Regions
Authors: Baranyi, T.; Ludmany, A.
1992SoPh..139..247B Altcode:
The large-scale distribution of the orientations of emerging sunspot
groups has been studied for the year 1977. It is probable that the
decimations from the azimuthal directions are not entirely randomly
scattered, but they can be governed also by subsurface velocity
fields. If this assumption is correct, the most probable internal
velocity distribution is a non-axisymmetric (columnar) giant convection
pattern with a longitudinal wave number l = 11 rotating slightly slower
than the Carrington system, on the basis of the given material.
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Title: Study of Spectral Line Asymmetry in Sunspots
Authors: Ludmany, A.
1986PDHO....6....5L Altcode:
The previously found inverse line asymmetry is studied in sunspots
near to the solar disc center.
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Title: Two-Component Modelling of Sunspot Spectral Line Profiles
Authors: Ludmany, A.
1986PDHO....6...11L Altcode:
A two-component model is discussed as a possible interpretation of
the negative asymmetry of spectral line λ5714 Ti I in sunspots.
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Title: The Birth and Development of a Regular Bipolar Sunspot Group
Authors: Nagy, I.; Ludmany, A.
1980PDHO....4.....N Altcode:
No abstract at ADS