Author name code: ludmany ADS astronomy entries on 2022-09-14 author:"Ludmany, Andrasz" ------------------------------------------------------------------------ Title: Instrumental profile of the Debrecen solar spectrograph Authors: Murakozy, J.; Vince, I.; Ludmany, A. Bibcode: 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. Title: Debrecen Photoheliographic Data for 1987 with image supplements Authors: Gyori, L.; Baranyi, T.; Csepura, G.; Gerlei, O.; Ludmany, A. Bibcode: 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. Title: Efficiency factors in the solar-troposheric relations Authors: Baranyi, T.; Ludmany, A. Bibcode: 2000lstv.conf...69B Altcode: No abstract at ADS Title: Debrecen Photoheliographic Data for 1986 with image supplements Authors: Györi, L.; Baranyi, T.; Csepura, G.; Gerlei, O.; Ludmany, A. Bibcode: 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. Title: Some Polarity Conditions in Corpuscular Events Authors: Baranyi, T.; Ludmany, A. Bibcode: 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. Title: Some Particle Effects in the Solar- Terrestrial Relations Authors: Baranyi, T.; Ludmany, A. Bibcode: 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. Title: Distinction between the climatic effects of the solar corpuscular and electromagnetic radiation Authors: Baranyi, T.; Ludmany, A. Bibcode: 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. Title: Study of Possible Subsurface Influences on the Emerging Active Regions Authors: Baranyi, T.; Ludmany, A. Bibcode: 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. Title: Study of Spectral Line Asymmetry in Sunspots Authors: Ludmany, A. Bibcode: 1986PDHO....6....5L Altcode: The previously found inverse line asymmetry is studied in sunspots near to the solar disc center. Title: Two-Component Modelling of Sunspot Spectral Line Profiles Authors: Ludmany, A. Bibcode: 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. Title: The Birth and Development of a Regular Bipolar Sunspot Group Authors: Nagy, I.; Ludmany, A. Bibcode: 1980PDHO....4.....N Altcode: No abstract at ADS