Search Results - "Rozelot, J. P."

Prediction of solar cycle 25: a non-linear approach by Sarp, V, Kilcik, A, Yurchyshyn, V, Rozelot, J P, Ozguc, A

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Nearly Century-scale Variation of the Sun's Radius by Hiremath, K. M., Rozelot, J. P., Sarp, V., Kilcik, A., D. G., Pavan, Gurumath, Shashanka R.

“…The Kodaikanal Archive Program (India) is now available to the scientific community in digital form as daily digitized solar white light pictures, from 1923 to…”
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Active Latitude Oscillations Observed on the Sun by Kilcik, A., Yurchyshyn, V., Clette, F., Ozguc, A., Rozelot, J.-P.

“…We investigate periodicities in the mean heliographic latitudes of sunspot groups, called active latitudes, for the past six complete solar cycles (1945 –…”
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History of solar oblateness measurements and interpretation by Rozelot, J. -P., Damiani, C.

“…The story of the solar oblateness begins in the pre-relativity days when an explanation of the observed advance of Mercury’s perihelion was searched for. Then,…”
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Probing The Solar Surface: The Oblateness and Astrophysical Consequences by Rozelot, J. P, Damiani, C, Pireaux, S

“…Based on historical records, the Sun's dimensions are temporally dependent. Until the recent past, varying dimensions were keenly disputed. Recent accurate…”
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Nonlinear Prediction of Solar Cycle 24 by Kilcik, A, Anderson, C. N. K, Rozelot, J. P, Ye, H, Sugihara, G, Ozguc, A

“…Sunspot activity is highly variable and challenging to forecast. Yet forecasts are important, since peak activity has profound effects on major geophysical…”
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Analysis of the Hemispheric Sunspot Number Time Series for the Solar Cycles 18 to 24 by Chowdhury, P., Kilcik, A., Yurchyshyn, V., Obridko, V. N., Rozelot, J. P.

“…In this article, we investigate temporal and periodic variations of the hemispheric sunspot number using sunspot data from Kanzelhöhe Solar Observatory (KSO)…”
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Solar apparent radius variability: a new statistical approach to astrolabe multisite observations by Badache-Damiani, C., Rozelot, J. P.

“…The results of the analysis of solar diameter measurements obtained by means of the astrolabe have been inconclusive so far. Temporal variations are found, but…”
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Solar Radius Measurements at Mount Wilson Observatory by Lefebvre, S, Bertello, L, Ulrich, R. K, Boyden, J. E, Rozelot, J. P

“…Possible temporal variations of the solar radius are important as an indicator of internal energy storage and as a mechanism for changes in the total solar…”
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Latitude dependency of solar flare index–temperature relation occuring over middle and high latitudes of Atlantic–Eurasian region by Kilcik, A., Özgüç, A., Rozelot, J.P.

“…By applying multitaper methods and Pearson test on the surface air temperature and flare index used as a proxy data for possible solar sources of…”
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Influence of the UTLS region on the astrolabes solar signal measurement by Badache-Damiani, C., Rozelot, J. P., Coughlin, K., Kilifarska, N.

“…Regular measurements of the Sun's diameter have been obtained by means of solar astrolabes for several decades. However, the variations found from those…”
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Revisiting the Solar Oblateness: Is Relevant Astrophysics Possible? by Rozelot, J. P., Fazel, Z.

“…The measurement of solar oblateness has a rich history extending well back into the past. Until recently, its estimate has been actively disputed, as has its…”
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Solar quadrupole moment and purely relativistic gravitation contributions to Mercury's perihelion advance by Pireaux, S, Rozelot, J-p

“…The perihelion advance of the orbit of Mercury has long been one of the observational cornerstones for testing General Relativity (G.R.).The main goal of this…”
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Sunspot Count Periodicities in Different Zurich Sunspot Group Classes Since 1986 by Kilcik, A., Ozguc, A., Yurchyshyn, V., Rozelot, J. P.

“…We used two methods to investigate the periodic behavior of sunspot counts in four categories for the time period January 1986 – October 2013. These categories…”
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Flare-production potential associated with different sunspot groups by Eren, S, Kilcik, A, Atay, T, Miteva, R, Yurchyshyn, V, Rozelot, J P, Ozguc, A

“…In this study, we analysed different types (C, M, and X classes) of X-ray solar flares occurring in sunspot groups. The data cover 1996-2014 time interval, and…”
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Temporal and Periodic Variations of Sunspot Counts in Flaring and Non-Flaring Active Regions by Kilcik, A., Yurchyshyn, V., Donmez, B., Obridko, V. N., Ozguc, A., Rozelot, J. P.

“…We analyzed temporal and periodic variations of sunspot counts (SSCs) in flaring (C-, M-, or X-class flares), and non-flaring active regions (ARs) for nearly…”
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Time Distributions of Large and Small Sunspot Groups Over Four Solar Cycles by Kilcik, A, Yurchyshyn, V. B, Abramenko, V, Goode, P. R, Ozguc, A, Rozelot, J. P, Cao, W

“…Here we analyze solar activity by focusing on time variations of the number of sunspot groups (SGs) as a function of their modified Zurich class. We analyzed…”
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Possible traces of solar activity effect on the surface air temperature of Turkey by Kilcik, A., Özgüç, A., Rozelot, J.P., Yeşilyurt, S.

“…In this study we investigate the effects of solar activity on the surface air temperature of Turkey. This enables us to understand existence of solar activity…”
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The evolution of flaring and non-flaring active regions by Kilcik, A, Yurchyshyn, V, Sahin, S, Sarp, V, Obridko, V, Ozguc, A, Rozelot, J P

“…Abstract According to the modified Zurich classification, sunspot groups are classified into seven different classes (A, B, C, D, E, F and H) based on their…”
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Exploring the temporal variation of the solar quadrupole moment from relativistic gravitation contributions: A fortuitous circumstance? by Rozelot, J.P., Eren, S.

“…Due to its oblateness, the Sun carries a solar quadrupole moment playing a key role at the crossroad of fundamental solar physics, astrometry and celestial…”
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