Non-Stable Phenomena

The research area of the department includes non stationary phenomena observed in objects belonging to different levels of the hierarchy of the cosmic structure. Studying the non stationary phenomena, revealed in cosmic objects from atomic nuclei to clusters of galaxies, which are usually associated with the presence of excess energy, we try to find qualitative and quantitative similarities between them. These studies allowed one to arrive at a conclusion that the accelerated expansion of the Universe takes place at all scales of space. Moreover, it is not difficult to see that the energy initiating this acceleration also gradually transforms from bearing it substance to the baryonic matter. This conclusion makes a rather good basic to revert again to the cosmogonic concept suggested in Byurakan since the mechanism of energy accumulation in cosmic objects making them non stable becomes obvious.

Comparing aforesaid with the characteristic properties of the baryonic matter, namely, the atomic structure and the mass defect – the key feature, which ensure the complete existence of atomic nuclei is really very important. This allows one arrive at a conclusion that the mass of baryonic object should gradually increase in course of time, and the process of evolution should lead to the growth of relative quantity of low mass objects at all hierarchical levels of cosmic structure.

General regularities manifest themselves at various hierarchical levels according to the physical conditions of the given level. Therefore, we the main research fields of the Byurakan observatory are included into the department scientific directions.

The first one is the study of star formation regions, which allows one to reveal the physical phenomena, taking place at the very early stage star formation. The study of stellar groups in these regions here also takes on special significance. The same concerns the epochal conclusion of Ambartsumian on the positive energy of stellar associations and its examination using the new observational data. Another problem associated with the evolution of binary stars’ dynamics is also linked to this area of studies.

We also consider the forms of instability manifestation by separate stars and stellar objects, especially ones associated with flare stars and Hα objects. Their qualitative comparison with objects exhibiting more powerful activity phenomena is within the scope of interests of the department, and especially it concerns to the various types of flaring phenomena, such as the fuors.

We intend to study the activity of galaxies using the analysis of consequences of their instability, implementing their comparative studies from supergiant cD galaxies down to dwarf ones. In contrast to the dominant viewpoint, we consider the first ones as generators of clusters of galaxies and the second ones – as the ultimate product of the galaxy evolution in our epoch. In addition to the pure statistical studies of the observational data, we are going to begin computer simulation of galaxy formation due to matter decay and mass ejection, taking also into account that the mass of baryonic matter increases during the evolution.

A bit on the side of the rest are the studies of the processes of changes of chemical abundances due to elements’ diffusion in the upper layers of chemically peculiar stars, depending on the physical characteristics of stars.

The department has collaboration with the Meudon Observatory in France and the University of Santiago deCompostella in Spain.

Haik HARUTYUNIAN PhD, Head of the Department
Norayr MELIKIAN PhD	Elena NIKOGHOSYAN PhD	Satenik GHAZARYAN PhD	Naira AZATYAN

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Scientific Publications 2013-2016

• Nikoghosyan E.H., Vardanyan A.V., Khachatryan K.G., The Statistical Analysis of stars with Hα emission in IC 348 Cluster, in Proceedings of the Armenian – Iranian Astronomical Workshop, 2016, p. 233


• Nikoghosyan E.H., Harutyunyan H.A., Azatyan N.M., The Multiple Systems in the Young Stellar Cluster IRAS 05137+3919, in Proceedings of the Armenian – Iranian Astronomical Workshop, 2016, p. 94


• Melikian N.D., The study of flare stars in Byurakan Observatory, in Proceedings of Armenian-Iranian Astronomical Workshop (AIAW), 2016, p. 84


• H.A.Harutyunian, Quasi-gravitational Effect in the Accelerating Universe, in Proceedings of the Armenian – Iranian Astronomical Workshop, 2016, p. 184.


• Azatyan N.M., Nikoghosyan E. H., The search of the stellar clusters in vicinity of YSOs with high and middle masses, in Proceedings of Armenian-Iranian Astronomical Workshop (AIAW), 2016, p. 115


• Harutyunian H.A., A Brief Survey of Activity Phenomena in Cosmic Objects, in Proceeding of the conference "Astronomical Surveys and Big Data", ASP Conference Series, Vol. 505, 2016, p. 152


• H.A.Harutyunian, Byurakan Astrophysical Observatory: Active Researches of the Activity Phenomena, in Proceedings of the Armenian – Iranian Astronomical Workshop, 2016, p.12


• Nikoghosyan E.H., Vardanyan A.V., Khachatryan K.G., The Search and Study of PMS Stars with Hα Emission, in Proceeding of the conference "Astronomical Surveys and Big Data", ASP Conference Series, Vol. 505, 2016, p. 66


• Melikian N.D., Karapetian A.A., Gomez J., New Emission Stars in Cyg OB7, 2016, Astrophysics, 59, 2016, 484


• H.A.Harutyunian, G.Alecian, K.Khachatryan, A.Vardanyan, Bilinear Expansion For Redistribution Functions, 2016, JQSRT, 183, 64


• Ghazaryan S., Alecian G., Statistical analysis from recent abundance determinations in HgMn stars, 2016, MNRAS, 460, 1912


• Azatyan N.M., Nikoghosyan E. H., Khachatryan K.G, Search for Compact Stellar Groups in the Vicinity of Iras Sources, 2016, Astrophysics, 59, 339


• Nikoghosyan E.H., The Ecology of Near-Earth Space Environment, in "Relation of Astronomy to other Sciences, Culture and Society", Proceedings of XIII Annual Meeting of Armenian Astronomical Society, Eds.: H. A. Harutyunian, A. M. Mickaelian, S. V. Farmanyan. Yerevan, "Gitutyun" Publishing House of NAS RA, 2015, p. 161


• Harutyunyan H. A., Astronomical terms and names as an indicator of the science level, in "Relation of Astronomy to other Sciences, Culture and Society", Proceedings of XIII Annual Meeting of Armenian Astronomical Society, Eds.: H. A. Harutyunian, A. M. Mickaelian, S. V. Farmanyan. Yerevan, "Gitutyun" Publishing House of NAS RA, 2015, p. 272


• Harutyunyan H. A., On a Possibility of Astrostatistics Methods' Application in the Literature, in "Relation of Astronomy to other Sciences, Culture and Society", Proceedings of XIII Annual Meeting of Armenian Astronomical Society, Eds.: H. A. Harutyunian, A. M. Mickaelian, S. V. Farmanyan. Yerevan, "Gitutyun" Publishing House of NAS RA, 2015, p. 213


• Nikoghosyan E. H., Vardanyan A.V., KhachatryanК. G., The Statistical Analysis of stars with Hα emission in IC 348 Cluster, 2015, Astrophysics, 58, 490


• Nikoghosyan E. H., Harutyunyan H. A., Azatyan N. M., Multiple Star Systems in the Young Cluster IRAS 05137+3919, 2015, Astrophysics, 58, 478


• Nikoghosyan E. H., Azatyan, N., The cluster of PMS stars in the vicinity of IRAS 05137+3919, in Proceedings of the Colloquium “Instability and Evolution of Stars” dedicated to LudwkMirzoyan’s 90th anniversary, Edit. Harutyunian H., Melikian N., Nikoghosyan E., Yerevan, 2014, p.84


• Melikian N. D., Continuous emission in the spectraof stellar flares, in Proceedings of the Colloquium “Instability and Evolution of Stars” dedicated to LudwkMirzoyan’s 90th anniversary, Edit. Harutyunian H., Melikian N., Nikoghosyan E., Yerevan, 2014, p. 54


• Harutyunian H. A., Are the ``Physically Bound Systems'' beyond the Cosmological Expansion Effect? (A provocative musing on the given theme), Proc. IAU Symposium #304: Multiwavelength AGN Surveys and Studies, Eds. Mickaelian A. M. & Sanders D. B., Cambridge University Press, V. 304, 2014, p.319


• Harutyunian H. A., Harutyunyan V. S., Relation of Kinematical Properties of cD Clusters of Galaxies with Their Radiative Characteristics, in Proceedings of the Colloquium “Instability and Evolution of Stars” dedicated to LudwkMirzoyan’s 90th anniversary, Edit. Harutyunian H., Melikian N., Nikoghosyan E., Yerevan, 2014, p. 142


• Harutyunian H. A., Accelerated expansion of the Universe as the most powerful source of the energy release in cosmic objects, in Proceedings of the Colloquium “Instability and Evolution of Stars” dedicated to Ludwik Mirzoyan’s 90th anniversary, Edit. Harutyunian H., Melikian N., Nikoghosyan E., Yerevan, 2014, p. 89


• Ghazaryan S., Physical and chemical parameters of HgMn stars on the basis of the available data, in Proceedings of the Colloquium “Instability and Evolution of Stars” dedicated to LudwkMirzoyan’s 90th anniversary, Edit. Harutyunian H., Melikian N., Nikoghosyan E., Yerevan, 2014, p.14.


• Nikoghosyan E. H., Azatyan, N., Young Stellar Cluster in the Vicinity of the IRAS 05137+3919 Source, 2014, Astrophysics, 57, 2014, 330


• Morel T., Briquet M., Auvergne M., Alecian G., Ghazaryan S. et al, A search for pulsations in HgMn stars with CoRoT observations of HD 45975, 2014, Astronomy and Astrophysics, 561, 35


• Melikian N. D., Gomez J., Karapetian A. A., New Hα Emission Stars in Cep OB3 Region. A Rapid Brightness Variation of V 733 Cep, 2014, Astrophysics, 57, 543


• Melikian N. D., Spectra of Stellar Flares. Continuum Emission, 2014, Astrophysics, 57, 77


• Harutyunian H. A., Harutyunyan V. S., Is it Possible to Find Signs of the Evolution of Anomalous Redshift by Studying Galaxies in a Single Cluster?, 2014, Astrophysics, 57, 484


• Nikoghosyan E.H., PMS Objects in The Star Forming Regions Cep OB3. II. The YSOs in The Hα Nebula CepB, 2013, Astrophysics, 56, 26


• Melikian N. D., Tamazian, V. S., Natsvlishvili R. Sh., Karapetian A. A., Spectral observations of flare stars in the neighborhood of the sun, 2013, Astrophysiscs, 56, 8


• Magakian T.Yu., Nikogossian E.H., Movsessian, T., Moiseev A., Aspin C., Davis C.J., Pyo Tae-Soo, Khanzadyan T., Froebrich D., Smith M.D., Moriarty-Schieven G.H., Beck T.L.,V2494 Cyg: a unique FU Ori type object in the Cygnus OB7 complex, 2013, MNRAS, 432, 2685


• Harutyunian H. A., Harutyunyan V. S.,Relationship of the Kinematic Properties of cD Galactic Clusters to Their Radiative Characteristics, 2013, Astrophysics, 56, 389


• Ghazaryan S., Alecian G., Harutyunian H.,Attept to Detect the Garnulation Signature in the HgMn Star HD175640 from CoRoT Light Curves, 2013, MNRAS, 435, 1852


• Ghazaryan S., On the question of detecting granulation signal in A and B star's CoRoT light curves, 2013, Advances in Astronomy and Space Physics, 3, 20

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