ROMANIAN ASTRONOMICAL JOURNAL

Vol. 18, SUPPLEMENT, 2008

Sub-Regional European Astronomical Committee

University of Athens

Astronomical Institute of the Romanian Academy

 

Proceedings  of  the  Astro-Meeting

 

LATEST  PROGRESS

IN  ASTROPHYSICS

 

Athens, Greece, 5–6 October 2007 

Edited by:

 

Helen Rovithis-Livaniou, Nedelia Antonia Popescu,

Vasile Mioc

with the financial support of UNESCO-BRESCE



C O N T E N T S



Foreword .......................................................................................................................................

7

Welcome …………………………………………………………………………………………

9

List of Participants ........................................................................................................................

11

 

 

Stellar Astrophysics ……………………………………………………………………………..

13

 

 

Katrien KOLENBERG, 100 Years of the Blazhko Phenomenon: Is the Solution in Sight? ........

15

Kiril PANOV, Dinko DIMITROV, The Controversial Case of FK Comae Berenices ................

25

Sotirios TSANTILAS, Helen ROVITHIS-LIVANIOU, Variable-Sine Algorithmic Analysis (VSAA): Applications to AB Andromedae and to the Wolf’s Sunspot Number ………..

 

29

Danae BISSYLLA, Eleni ROVITHIS-LIVANIOU, Orbital Period Changes in Contact Binaries

41

Danae ANTONOPOULOU, Alexandros PAPAGEORGIOU, Sotirios TSANTILAS, Eleni ROVITHIS-LIVANIOU, Mass Transfer Rates in Algols and Secular Period Changes in RS CVn-Type Systems …………………………………………………………………..

 

 

49

Renada KONSTANTINOVA-ANTOVA, Rumen BOGDANOVSKI, Alexandar ANTOV, Borislav SPASSOV, Flare Activity of AD Leo in the Period 2006–2007 ………………

 

55

Ia KOCHIASHVILI, Nino KOCHIASHVILI, Is EM Cep a Binary System or a Short-Period Cepheid? …………………………………………………………………………………

 

61

Alexios LIAKOS, Panagiotis NIARCHOS, The Light-Time Effect in the Algol-Type Eclipsing Binary UZ Sagittae ………………………………………………………………………

 

67

Giannis KONTOGIANNIS, Nikolaos NANOURIS, Eugenia ANTONOPOULOU, Giannis GIANNIKAKIS, V1025 Herculi and V1071 Herculi: BVRI Photometry and Color Indices Estimation ……………………………………………………………………….

 

 

73

Rezo NATSVLISHVILI, Nino KOCHIASHVILI, Flare Processes in Different Type Stars …..

79

Burak ULAŞ, Osman DEMİRÇAN, Theoretical Relation between Oscillation Frequencies of Distorted and Undistorted Polytropic Stars ………………………………………….…..

 

87

Chloi VAMVATIRA-NAKOU, Alexios LIAKOS, Vassilios MANIMANIS, Panagiotis NIARCHOS, The β Lyrae-Type Eclipsing Binary EG Cep: New BVRI Photometry and Modelling ……………………………………………………….………………………..

 

91

Irina VOLOSHINA, Eleni ROVITHIS-LIVANIOU, Vladimir METLOV, Short-Term Variability of the Dwarf Nova SS Cygni during the Outbursts …….……………………

 

95

Irina VOLOSHINA, Vladimir METLOV, Ludmila LARIONOVA, Tatiana KONSTANTINOVA, Study of the Recurrent Nova RS Ophiuchi ….…………………..

 

101

Panagiotis ZAVROS, Sotirios TSANTILAS, Eleni ROVITHIS-LIVANIOU, AO Serpentis: Observations and Interpretations ………………………………….…….……………….

113

 

 

Stellar Astrophysics: Abstracts of Unpublished Contributions …………………………………

123

O. LATKOVIĆ, H. MARKOV, I. VINCE, New Spectroscopic Results for the Eclipsing Binary HS Her …………………………………………………………………………………...

 

125

O. LATKOVIĆ, A. PRSA, G. MATIJEVIĆ, Study of Eclipsing Binaries with PHOEBE ...…...

125

A. LIAKOS, G.-P. GRADOULA, P. NIARCHOS, Seasonal Light Variations of the Contact System V839 Oph in 2007 ……………………………………………………………….

 

126

G. DJURAŠEVIĆ, I. VINCE, I. ANTOKHIN, M. ZAKIROV, M. ESHANKULOVA, Possible Accretion Disk in the Active Binary System V455 Cygni ………………………………

 

126

 

 

Dynamical Astronomy …………………………………………………………………………..

127

 

 

Vasile MIOC, Emil POPESCU, Nedelia Antonia POPESCU, Phase-Space Structure in Lennard-Jones-Type Problems ..........................................................................................

 

129

Zoran KNEŽEVIĆ, Preliminary Orbit Determination with Topocentric Correction ……………

149

Cătălin GALEŞ, Ciprian CHIRUȚǍ, Investigation of Asteroid Dynamics via Numerical Methods …………………………………………………………………………………..

 

161

Ciprian CHIRUȚǍ, Photogravitational Elliptic Restricted Three-Body Problem: Constantin Popovici’s Model ………………………………………………………………………...

 

177

Vasile URECHE, Rodica ROMAN, Vasile MIOC, A Classical Post-Newtonian Approximation for Fock’s Problem ………………………………………………………………………

 

189

 

 

Dynamical Astronomy: Abstracts of Unpublished Contributions ………………………………

195

M. BARBOSU, On the Regions of Possible Motion in the Planar Three-Body Problem ………

197

 

 

Sun and Solar System ……………………………………………………………………………

199

 

 

Cristiana DUMITRACHE, Iulia CHIFU, Marilena MIERLA, Investigation of a Polar Filament Eruption in Stages ……………………………………………………………………….

 

201

 

 

Sun and Solar System: Abstracts of Unpublished Contributions ……………………………….

213

C. CAROUBALOS, X. MOUSSAS, P. PREKA-PAPADEMA, A. HILLARIS, E. MITSAKOU, G. POTHITAKIS, C. BOURATZIS, P. TSITSIPIS, A. KONTOGEORGOS, C. E. ALISSANDRAKIS, J.-L. BOURGERET, G. DUMAS, ARTEMIS, a Solar Radiospectrograph ………………………………………………………………………

 

 

 

215

V. IVANOVA, A. KRZYSZCZYNSKA, G. APOSTOLOVSKA, Asteroid Lightcurve Photometry from NAO Rozhen – December 2006 to August 2007 ……………………..

 

215

 

 

Galaxies and Cosmology. Virtual Astronomy ………………………………………………….

217

 

 

Nedelia Antonia POPESCU, Photometric and Morphological Properties of Galaxy Pairs in the Environment of Radio Galaxies ……………………………………………………..….

 

219

Evdokia LIVANOU, Mary KONTIZAS, Evangelos KONTIZAS, Ioannis GONIDAKIS, Uli KLEIN, Stellar Density Distribution of the Small Magellanic Cloud in the Near Infrared

 

231

Nikos HIOTELIS, Semi-Analytical Approximations of the Formation of Dark Matter Haloes in a ΛCDM Universe ……………………………………………………………………….

 

239

Areg MICKAELIAN, Lusine SARGSYAN, Kamo GIGOYAN, Lidia ERASTOVA, Parandzem SINAMYAN, Lilit HOVHANNISYAN, Enrico MASSARO, Roberto NESCI, Corinne ROSSI, Silvia GAUDENZI, Silvia SCLAVI, Giuseppe CIRIMELE, Daniel WEEDMAN, James HOUCK, Don BARRY, Alain SARKISSIAN, William THUILLOT, Jérôme BERTHIER, Philippe PRUGNIEL, Ia KOCHIASHVILI, Gor MIKAYELYAN, Science Projects with the Armenian Virtual Observatory (ArVO) …..

 

 

 

 

249

 

 

General …………………………………………………………………………………………..

261

 

 

Katrien KOLENBERG, Astronomy in Mongolia – An Outsider’s Impressions ……………….

263

Petros ROVITHIS, Eleni ROVITHIS-LIVANIOU, Magda STAVINSCHI, Did the Ancients Know America? …………………………………………………………………..……...

267

 

 

General: Abstracts of Unpublished Contributions ……………………………..………………..

279

M. STAVINSCHI, V. MIOC, Romanian Modern Astronomy at Centenary ……………………

281

X. MOUSSAS, J. H. SEIRADAKIS, T. FREETH, Y. BITSAKIS, A TSELIKAS, E. MAGKOU, M. ZAFEIROPOULOU, R. HADLAND, A. RAMSEY, M. ALLEN, T. MALZBENDER, M. G. EDMUNDS, G. DUMAS, The Antikythera Mechanism, the Oldest Known Astronomical Computer …………………………………………………

 

 

 

281