RECENT SCIENTIFIC RESULTS OBTAINED AT BAO

During the recent years (2000-2008), a number of important results have been achieved. Altogether, 50 results are listed, including results in frame of projects that have been started before and are still active. 

 

1984-2004         Spectroscopic studies of the Second Byurakan Survey galaxies aimed at study of the sample at B<17; discovery of many new Seyferts, LINERs, Starbursts, BCDGs, etc. (J.A. Stepanian, L.K. Erastova, V.H. Chavushian, H.M. Tovmassian, in collaboration with astronomers from Mexico; S.K. Balayan, S.A. Hakopian, in collaboration with astronomers from the Special Astrophysical Observatory, Russia).

 

J.A. Stepanian, V.H. Chavushyan, L. Carrasco, J.R. Valdes, R.M. Mujica, H.M. Tovmassian, V.T. Ayvazyan, Spectral Observations of Faint Markarian Galaxies of the Second Byurakan Survey. III // Astron. J., Vol. 124, No. 3, p. 1283-1307, 2002 (and references therein).

S.A. Hakopian, S.K. Balayan, Spectroscopy of Galaxies in Selected Fields of the Second Byurakan Survey // Astrophysics, Vol. 47, No. 3, p. 378-388, 2004 (and references therein).

 

1984-2002         Study of the magnetic fields of extragalactic radio sources; correlation between the directions of the magnetic fields and major axes, mechanism of formation of a dipole magnetic field, etc. (R.R. Andreasyan, in collaboration with astronomers from France).

 

                                R.R. Andreasyan, S. Appl, H. Sol, Correlation between the Directions of the Magnetic Fields and Major Axes of Extragalactic Radio Sources // Astrophysics, Vol. 45, No. 2, p. 198-204, 2002 (and references therein).

 

1987-2003         The Second part of the FBS, search for blue stellar objects and late-type stars on the FBS plates. 1103 blue stellar objects and 1000 late-type stars were revealed, including many new QSOs, white dwarfs, cataclysmic variables, carbon stars, etc. (H.V. Abrahamian, A.M. Mickaelian, K.S. Gigoyan, P.K. Sinamyan).

 

H.V. Abrahamian, A.M. Mickaelian, The First Byurakan Spectral Sky Survey. Blue Stellar Objects. XI. Region +80°ЈdЈ+90° // Astrophysics, Vol. 39, No. 4, p. 315-320, 1996 (and references therein).

K.S. Gigoyan, H.V. Abrahamian, et al., First Byurakan Spectral Sky Survey. Stars of Late-Spectral Types. XIV. Zone +13°<DEC<+33° // Astrophysics, Vol. 46, No. 4, p. 475-488, 2003 (and references therein). H.V. Abrahamian, 2007, VizieR On-line Data Catalog: III/246.

 

1987-2004         Study of Fuors and Subfuors (Exors); spectral observations of subfuors (E.S. Parsamian, K.G. Gasparian, in collaboration with astronomers from Mexico).

 

E.S. Parsamian, R. Mujica, L. Corral, Spectroscopic Observations of Subfuors (Exors). I. V1118 Ori // Astrophyiscs, Vol. 45, No. 4, p. 393-399, 2002.

E.S. Parsamian, R. Mujica, Spectral Observations of Subfuors (Exors). II. V1143 Ori // Astrophyiscs, Vol. 47, No. 4, p. 433-442, 2004 (and references therein).

 

1987-2007         Spectral and photometric study of Shahbazian compact groups of compact galaxies; it was shown that 7-10% of member galaxies in Shahbazian compact groups are emission-line galaxies including classical Sy1-s and narrow-emission-line galaxies (A.S. Amirkhanian, A.G. Egikian).

                                               

                                A.S. Amirkhanian, E.Ye. Khachikian, A.G. Eghikian, Spectral and photometric study of compact groups of compact galaxies // Astrophysics, Vol. 50, No. 3, p. 283-288, 2007 (and references therein).

 

1988-2007         Suggestion of new criteria for identification of groups of galaxies based on the neighbourhood of pairs. Complitaion of a list of galaxy groups. Statistical investigation of groups (A.P. Mahtessian).

 

A.P. Mahtessian, Groups of galaxies. IV. Effect of observational selection on the relationship between the characteristics and distance of groups and a comparison with the groups of Geller and Huchra // Astrophysics, Vol. 50, No. 4, p. 440-450, 2007 (and references therein).

 

1993-2001         Determination of the radio luminosities of pulsars and the distribution of interstellar electron density based on the pulsars periods and the time variation of the period. Independent distances were determined for pulsars and the average electron densities toward the pulsars were determined from the known dispersion measures. It was shown that the distribution maximum lies in the vicinity of the Sagittarius spiral arm (R.R. Andreasyan, T.G. Arshakian).

 

R.R. Andreasyan, T.G. Arshakian, The radio luminosity of pulsars and the distribution of interstellar electron density // Astrophys. Space Sci., Vol. 278, No. 1/2, p. 175-179, 2001 (and references therein).

 

1995-2004         Optical identifications and studies of IRAS infrared sources. 1577 IRAS point sources were identified using the FBS spectra and DSS images. Many new IR galaxies (including LIRGs and ULIRGs, as well as AGNs and interacting/merging pairs and groups) and IR-excess stars were revealed (A.M. Mickaelian, K.S. Gigoyan, L.A. Sargsyan).

 

A.M. Mickaelian, Optical Identifications of the IRAS Point Sources Based on the First Byurakan Survey // Astrophysics, Vol. 38, No. 4, p. 349-351, 1995.

A.M. Mickaelian, L.A. Sargsyan, Optical identifications of IRAS Point Sources. Galaxies. X // Astrophysics, Vol. 47, No. 2, p. 213-228, 2004 (and references therein).

 

1990s-2001       Studies of the structure of Abell clusters of galaxies (E.H. Nikogossian).

 

E.H. Nikogossian, Structure of the Clusters of Galaxies A 2634, A 1983, and DC 0428-53 // Astrophysics, Vol. 44, No. 3, p. 305-314, 2001 (and references therein).

 

1990s-2008       Detailed studies of young stellar objects: HH objects, cometary nebulae, T Tau stars, and associated jets. Studies include imaging, spectroscopic (including integral field spectroscopy), and near-IR observations (T.Yu. Magakian, T.H. Movsessian, E.H. Nikogossian, E.R. Hovhannessian, in collaboration with astronomers from Russia, USA, and UK).

 

T.H. Movsessian, T.Yu. Magakian, D.M. Sargsyan, E.H. Nikogossian, Integral spectroscopy of the nebula GM 1-29 and the star PV Cep // Astrophysics, Vol. 51, No. 3, p. 387-393, 2008 (and references therein).

 

1990s-2007       Multi-wavelength studies of a new sample of blue compact dwarf galaxies selected from SBS (A.R. Petrosian, in collaboration with astronomers from France, Germany, and India).

 

W.K. Huchtmeier, A.R. Petrosian, Gopal-Krishna, D. Kunth, HI-observations of blue compact dwarf galaxies. II // Astron. Astrophys., Vol. 462, No. 3, p. 919-926, 2007 (and references therein).

 

1990s-2006       Discovery of new dark globules in the star forming regions and rotation of some of them (A.L. Gyulbudaghian, in collaboration with astronomers from Spain and Chile).

 

Carrasco-Gonzalez, C.; Lopez, R.; A.L. Gyulbudaghian, A.; Anglada, G.; Lee, C. W., A new radial system of dark globules in Monoceros // Astron. Astrophys., Vol. 445, No. 3, p. L43-L46, 2006 (and references therein).

 

1997-2006         Spectral investigation of Byurakan-IRAS Galaxies (BIG). (A.M. Mickaelian, S.K. Balayan, S.A. Hakopian, L.A. Sargsyan, in collaboration with astronomers from France and Russia).

 

L.A. Sargsyan, A.M. Mickaelian, Spectral study of BIG objects on the 2.6-m telescope at the Byurakan Astrophysical Observatory // Astrophysics, Vol. 49, No. 1, p. 19-35, 2006 (and references therein).

 

1998-2001         Multiwavelength studies of barred galaxies (A.T. Kalloghlian, R.A. Kandalyan, V.G. Panajyan, in collaboration with astronomers from Jordan).

 

A.T. Kalloghlian, R.A. Kandalyan, H.M.K. Al-Naimiy, A.M. Khassawneh, Investigation of Barred Galaxies. VII. Comparative Statistics of SB and SA Galaxies. Near and Mid-IR Regions // Astrophysics, Vol. 44, No. 3, p. 292-304, 2001 (and references therein).

 

1999-2001         Discovery of new bright QSOs in the FBS and estimation of their surface density (0.012 deg^-2 for objects with B<16.1). Estimation of the completeness of the Bright Quasar Survey (53%) (A.M. Mickaelian, in collaboration with astronomers from France).

 

A.M. Mickaelian, A.C. Gonзalves, M.P. Veron-Cetty, P. Veron, On the nature of the FBS blue stellar objects and the completeness of the Bright Quasar Survey // Astrophysics, Vol. 42, No. 1, p. 1-14, 1999.

A.M. Mickaelian, A.C. Gonзalves, M.P. Veron-Cetty, P. Veron, On the nature of the FBS blue stellar objects and the completeness of the Bright Quasar Survey. II // Astrophysics, Vol. 44, No. 1, p. 14-22, 2001.

 

2000                 Suggestion of an asymmetric relativistic model for classical double radio sources based on the statistical analysis of FRII sources from the 3CRR complete sample (T.G. Arshakian, in collaboration with M.S. Longair, Cavendish Laboratory, Cambridge University, UK).

 

T.G. Arshakian, M.S. Longair, An asymmetric relativistic model for classical double radio sources // Mon. Notices Roy. Astron. Soc., Vol. 311, No. 4, p. 846-860, 2000.

 

2000-2001         Studies of the relationship between infrared and radio emission of various types of galaxies, including Seyferts and LINERs (V.H. Malumian, V.G. Panajyan).

 

V.H. Malumian, Relationship Between Infrared and Radio Emission of Spiral Galaxies // Astrophysics, Vol. 43, No. 1, p. 23-31, 2000.

                                V.H. Malumian, V.G. Panajyan, Relationship between Infrared and Radio Emission of Seyfert Galaxies // Astrophysics, Vol. 43, No. 4, p. 403-412, 2000.

                                V.H. Malumian, V.G. Panajyan, Relationship between Infrared and Radio Emission of Galaxies of the LINER Type // Astrophysics, Vol. 44, No. 4, p. 491-497, 2001.

 

2001                 Estimation of the maximum IR luminosity of a single spiral galaxy. It was shown that all IR sources with luminosities higher than L_IR=10¹²L_Sun must be interacting/merging pairs (A.M. Mickaelian, in collaboration with P. Veron and M.P. Veron-Cetty, OHP, France).

 

A.M. Mickaelian, M.P. Veron-Cetty, P. Veron, What is the Maximum IR Luminosity of a Single Spiral Galaxy? // Proc. IAU Symp. 205, ASP, Vol. 205, p. 232-233, 2001.

 

2001                 Discovery of gas-dust shells around 34 early type stars with IR excess based on IRAS observations of O-B-A-F type stars (R.Kh. Hovhannessian, E.R. Hovhannessian).

 

R.Kh. Hovhannessian, E.R. Hovhannessian, Gas-Dust Shells around Some Early-Type Stars with an IR Excess (of Emission) // Astrophysics, Vol. 44, No. 4, p. 454-462, 2001.

 

2001                 Study of the formation of heavy hydrocarbons in molecular clouds. Laboratory data on the conversion of solid methane into large hydrocarbons by particle radiation were used to estimate the fraction of interstellar carbon converted by this process into refractory form (Ar.G. Yeghikian, in collaboration with scientists from University College London, UK).

 

                                A. G. Yeghikyan, S. Viti, D.A. Williams, The formation of heavy hydrocarbons in molecular clouds // Mon. Notices Roy. Astron. Soc., Vol. 326, No. 1, p. 313-316, 2001.

 

2001-2002         Interpretation of the radiation of the coronal supra-thermal streams by the effect of Compton scattering of the photospheric radiation on fast electrons of the coronal suprathermal streams (A.G. Nikoghossian, in collaboration with S. Koutchmy, France).

 

A.G. Nikoghossian, S. Koutchmy, Interpretation of the Radiation of Coronal Suprathermal Streams. I // Astrophyiscs, Vol. 44, No. 4, p. 528-535, 2001.

A.G. Nikoghossian, S. Koutchmy, On Interpretation of the Radiation of Coronal Suprathermal Streams. II // Astrophyiscs, Vol. 45, No. 4, p. 489-496, 2002.

 

2001-2008         Studies of Supernovae in active and star forming galaxies. Supernovae in isolated galaxies, in pairs and groups of galaxies. The supernova rate per unit mass. Statistical investigation of type Ib/c and II supernovae and their host galaxies. Early-type galaxies with core collapse supernovae (A.R. Petrosian, et al., in collaboration with astronomers from France, Italy, and USA).

 

A.A. Hakobyan, A.R. Petrosian, B. McLean, D. Kunth, R.J. Allen, M. Turatto, R. Barbon, Early-type galaxies with core collapse supernovae // Astronomy and Astrophysics, Vol. 488, No. 2, p. 523-531, 2008 (and references therein).

 

2001-2008         Spectral and photometric study of flare stars in Solar neighbourhood and discovery of new flare stars in Galactic Dark Clouds (N.D. Melikian, A.A. Karapetian, in collaboration with J.A. Docobo and V.S. Tamazian, Spain).

 

N.D. Melikian, V.S. Tamazian, Spectral and photometric observations of Y Ori // Astrophysics, Vol. 51, No. 4, p. 482-489, 2008 (and references therein).

 

2001-2008         Study of flare star activity and frequency distribution of flares. Derivation of the frequency distribution function of stellar flares and variation in the flaring activity of flare stars in Pleiades and Orion aggregates (A.A. Akopian).

 

                                A. A. Akopian, Long-term variation in the flaring activity of flare stars // Astrophysics, Vol. 51, No. 1, p. 48-57, 2008 (and references therein).

 

2002-2003         Extended studies of the Second Byurakan Survey galaxies (A.R. Petrosian, in collaboration with Space Telescope Science Institute, USA).

 

A.R. Petrosian, B. McLean, R.J. Allen, et al., Studies of the Second Byurakan Survey Galaxies. I. Mergers, Interacting Systems, and Close Pairs // Astron. J., Vol. 123, No. 5, p. 2280-2301, 2002.

A.R. Petrosian, R.J. Allen, C. Leitherer, et al., Studies of the Second Byurakan Survey Galaxies. II. Comparison of Ultraviolet-excess and Emission-line Techniques // Astron. J., Vol. 125, No. 1, p. 86-97, 2003.

 

2002-2004         Optical identifications and studies of ROSAT X-ray sources. A large number, 5908 sources from ROSAT-FSC catalogue were identified using the Hamburg survey spectra and DSS images. The Byurakan/Hamburg/ROSAT Catalogue (BHRC) was published. 42 new bright AGN were discovered (A.M. Mickaelian, S.K. Balayan, et al., in collaboration with D. Engels, et al., Hamburger Sternwarte, Germany).

 

M.P. Veron-Cetty, S.K. Balayan, A.M. Mickaelian, et al., Optically bright AGNs in the ROSAT Faint Source Catalogue // Astron. Astrophys., Vol. 414, p. 487-496, 2004.

A.M. Mickaelian, L.R. Hovhannisyan, D. Engels, H. Hagen, W. Voges, The Byurakan/Hamburg/ROSAT Catalogue of optical identifications // Astron. Astrophys., Vol. 449, No. 1, p. 425-433, 2006. VizieR On-line Data Catalog: J/A+A/449/425.

 

2002-2005         Digitization of the FBS and creation of the largest spectroscopic database, the Digitized First Byurakan Survey (DFBS). 20,000,000 low-dispersion spectra (A.M. Mickaelian, L.A. Sargsyan, et al., in collaboration with Universita di Roma “La Sapienza”, Italy and Cornell University, USA).

 

A.M. Mickaelian, R. Nesci, C. Rossi, et al., The Digitized First Byurakan Survey – DFBS // Astron. Astrophysics, Vol 464, No. 3, p. 1177-1180, 2007.

 

2002-2008         Many-sided studies of Local Starburst Galaxies. HST/ACS Ly-alpha images of local starbursts. Extended tidal structure in Ly-alpha-emitting starbursts. Local Ly-alpha emitters and their relevance to high-redshift star-forming galaxies. Study of HII regions in nearby galaxies (A.R. Petrosian, in collaboration with Space Telescope Science Institute, USA).

 

J.M. Mas-Hesse, D. Kunth, H. Atek, G. Ostlin, C. Leitherer, A.R. Petrosian, D. Schaerer, Local Lyman alpha emitters and their relevance to high-redshift star-forming galaxies // Astrophys. Space Sci., 2008.

 

2003                 Compilation and publication of the Merged catalogue of reflection nebulae, the most complete reference list for these objects (T.Yu. Magakian). 

 

                                T.Yu. Magakian, Merged catalogue of reflection nebulae // Astron. Astrophys., Vol. 399 No. 1, p. 141-145, 2003. VizieR On-line Data Catalog: J/A+A/399/141.

 

2003                 Obtaining accurate BVIJHK period-luminosity relations for classical Cepheids in the Galaxy and Magellanic clouds (H.V. Abrahamian).

 

                                H.V. Abrahamyan, Period-Luminosity Relations for Classical Cepheids // Astrophysics, Vol. 46, No. 4, p. 455-464, 2003.

 

2003                 Suggestion of a unified phenomenological model of light curves of stellar flares to explain a wide variety of flares. An assumption was made that a flare consists of a fast and relatively strong rise in brightness followed by a slow and fainter component. The latter is a result of re-radiation of the part of the energy of the prime flare by the photosphere of the star (V.P. Zalinian, in collaboration with astronomers from Mexico).

 

H.M. Tovmassian, V.P. Zalinian, N.A. Silant'ev, O. Cardona, M. Chavez, The unified phenomenological model of light curves of stellar flares // Astron. Astrophys., Vol. 399, No. 2, p. 647-651, 2003.

 

2003-2007         Detailed study of the T Tau star AA Tau and new T Tau stars. UBVRI light curves and magnetospheric accretion-ejection processes in AA Tau (T.Yu. Magakian, et al., in collaboration with astronomers from France, Japan, and Kazakhstan).

 

J. Bouvier, S.H.P. Alencar, T. Boutelier, C. Dougados, Z. Balog, K. Grankin, S.T. Hodgkin, M.A. Ibrahimov, M. Kun, T.Yu. Magakian, C. Pinte, Magnetospheric accretion-ejection processes in the classical T Tauri star AA Tauri // Astron. Astrophys., Vol. 463, No. 3, p. 1017-1028, 2007 (and references therein).

 

2003-2007         Studies of radio and X-ray properties of OH megamaser galaxies (R.A. Kandalyan).

 

R.A. Kandalyan, Some Features of the X-Ray and Radio Emission from OH Megamaser Galaxies // Astrophysics, Vol. 48, No. 3, p. 355-362, 2005 (and references therein).

 

2003-2008         Suggestion that cD galaxies are generators of the clusters in which they occur based on the observed features of cD galaxies and the associated clusters, while all the galaxies of a given cluster are products of the activity of a central supergiant galaxy. A physical connection between activity phenomena and cosmic expansion is sought (H.A. Harutyunian).

 

H.A. Harutyunian, Fragmentation of Cosmic Objects in the Course of their Evolution and the Possible Role of Hubble Expansion in this Process // Astrophysics, Vol. 46, No. 1, p. 81-91, 2003.

H.A. Harutyunian, On the nature of cD galaxies // Astrophysics, Vol. 51, No. 2, p. 141-152, 2008.

 

2003-2008         Search for Herbig-Haro objects and emission-line stars in star formation regions. Several dozens of new HH objects and emission stars have been discovered (T.Yu. Magakian, T.H. Movsessian, E.H. Nikogossian).

 

T.H. Movsessian, T.Yu. Magakian, E.H. Nikogossian, J. Bally, Searches for HH objects and emission stars in star formation regions. V. Two new cometary nebulae in Perseus // Astrophysics, Vol. 51, No. 2, p. 181-188, 2008 (and references therein).

 

2003-2008         Detailed investigation of visual binary stars: orbits, dynamical masses, parallaxes, MK types, etc. (N.D. Melikian, A.A. Karapetian, in collaboration with astronomers from Spain and Russia).

 

J.A. Docobo, V.S. Tamazian, M. Andrade, N.D. Melikian, A.A. Karapetian, Refining the Parallax in Visual Double Stars Using Orbital and Spectral Data: Application to the System of the K0 Giants, A 1808 // Astron. J., Vol. 136, No. 2, p. 890-894, 2008 (and references therein).

 

2004                 The hypothesis of possible anomalous redshift in spectra of young objects based on counts of faint blue objects, considered under the assumption that a large fraction of quasars are local objects ejected from galactic nuclei. This approach was used to examine the problem of excess of blue galaxies (H.A. Harutyunian).

 

                                H.A. Harutyunian, Counts of Faint Blue Objects and the Anomalous Red Shift // Astrophysics, Vol. 47, No. 4, p. 538-546, 2004.

 

2004                 A new approach was proposed for solution of the simplest one-dimensional problem of diffuse reflection and transmission of radiation in inhomogeneous atmospheres with finite optical thicknesses, based on Ambartsumian's method of adding layers. The approach was used to solve the radiative transfer problem in scattering and absorbing multicomponent atmospheres (A.G. Nikoghossian).

 

A.G. Nikoghossian, Radiative Transfer in Inhomogeneous Atmospheres. I // Astrophysics, Vol. 47, No. 1, p. 104-116, 2004.

A.G. Nikoghossian, Radiative Transfer in Inhomogeneous Atmospheres. II // Astrophysics, Vol.  47, No. 2, p. 248-259, 2004.

A.G. Nikoghossian, Radiative Transfer in Inhomogeneous Atmospheres. III // Astrophysics, Vol.  47, No. 3, p. 412-421, 2004.

 

2004                 Statistical studies of properties of SBS galaxies. Diagnostic diagrams and analysis of activity. Characteristic Features of a separate sample. Distinguishing active dwarf galaxies (L.K. Erastova).

 

                                L.K. Erastova, Properties of Galaxies in the Second Byurakan Survey. I. Diagnostic Diagrams // Astrophysics, Vol. 47, No. 1, p. 79-90, 2004.

L.K. Erastova, Properties of Galaxies in the Second Byurakan Survey. II. Characteristic Features of a Separate Sample of Galaxies // Astrophysics, Vol. 47, No. 4, p. 547-554, 2004.

 

2004                 Publication of the Catalog of 216 stars with probable circular polarization; selection is made from the Catalog of starlight polarization (7500 stars) (M.H. Eritsian).

 

                                M.A. Eritsian, Circular Polarization of Starlight // Astrophysics, Vol. 47, No. 3, p. 305-312, 2004. VizieR On-line Data Catalog: J/other/Ap/47.305.

 

2004-2006         Statistical studies of pulsars: spatial distribution, age dependence of several parameters of the radiation, and relation to the supernovae remnants (V.H. Malumian, A.N. Harutyunyan).

 

V.H. Malumian, A.N. Harutyunyan, Spatial Distribution of Pulsars // Astrophysics, Vol. 47, No. 4, p. 568-572, 2004.

V.H. Malumian, A.N. Harutyunyan, Age Dependence of Several Parameters of the Radiation from Radio Pulsars // Astrophysics, Vol. 48, No. 2, p. 188-193, 2005.

V.H. Malumian, A.N. Harutyunyan, Relation of pulsars to the remnants of supernova bursts // Astrophysics, Vol. 49, No. 1, p. 88-95, 2006.

 

2004-2007         A new survey of cool carbon stars in the halo based on 2MASS. Discovery of very red and distant objects (K.S. Gigoyan, in collaboration with astronomers from France and UK).

 

N. Mauron, M. Azzopardi, K. Gigoyan, T.R. Kendall, Cool carbon stars in the halo: A new survey based on 2MASS // Astron. Astrophys., Vol. 418, No. 1, p. 77-88, 2004.

N. Mauron, T.R. Kendall, K. Gigoyan, Cool carbon stars in the halo. II. A study of 25 new objects // Astron. Astrophys., Vol. 438, No. 3, p. 867-874, 2005.

N. Mauron, K. Gigoyan, T.R. Kendall, Cool carbon stars in the halo: new very red or distant objects // Astron. Astrophys., Vol. 475, No. 3, p. 843-849, 2007.

 

2004-2008         Studies of the Southern Galactic molecular clouds and star forming regions. Discovery of new Herbig-Haro objects and outflows (A.L. Gyulbudaghian, in collaboration with J. May, et al., Chile).

 

A.L. Gyulbudaghian, J. May, Star-forming region BBW 36 in Puppis // Astrophysics, Vol. 51, No. 3, p. 394-402, 2008 (and references therein).

 

2005                 Creation of the Armenian Virtual Observatory (ArVO) and its acceptance in the International Virtual Observatory Alliance (IVOA) (A.M. Mickaelian).

 

A.M. Mickaelian, The Armenian Virtual Observatory – ArVO // Rom. Astron. J., Vol. 16, p. 23-32, 2006.

 

2005-2007         Study of the structure and substructures of Coma cluster of galaxies. Study of flattening of galaxies in subclusters of Coma (A.T. Kalloghlian, in collaboration with N.G. Kogoshvili and T.M. Borchkhadze, Georgia).

 

N.G. Kogoshvili, T.M. Borchkhadze, A.T. Kalloghlian, Study of the Structure of the Coma Cluster Based on a Hierarchical Force Clustering Method // Astrophysics, Vol. 48, No. 4, p. 433-444, 2005.

N.G. Kogoshvili, T.M. Borchkhadze, A.T. Kalloghlian, Flattening of galaxies of different morphological types in subclusters of Coma // Astrophysics, Vol. 50, No. 3, p. 289-300, 2007.

 

2006                 Compilation and publication of the Revised and Updated Catalog of the Byurakan-IRAS Stars (BIS). Multiwavelength data are given for 276 objects (A.M. Mickaelian, K.S. Gigoyan).

 

A.M. Mickaelian, K.S. Gigoyan, Revised and Updated Byurakan-IRAS Star Catalog // Astron. Astrophysics, Vol. 455, No. 2, p. 765-772, 2006. VizieR On-line Data Catalog: III/237A.

 

2006-2008         Spectral investigation of the FBS blue stellar objects; revealing many new white dwarfs, hot subdwarfs, cataclysmic variables, and a new planetary nebula. Estimation of the content of the FBS (P.K. Sinamyan, A.M. Mickaelian).

 

                                P.K. Sinamyan, A.M. Mickaelian, Spectral observations of blue stellar objects from FBS in the zone d = +43° // Astrophyiscs, Vol. 49, No. 3, p. 333-349, 2006.

                                P.K. Sinamyan, A.M. Mickaelian, Spectral observations of blue stellar objects from FBS in the zone d = +39° // Astrophyiscs, Vol. 51, No. 1, p. 37-47, 2008.

                                P.K. Sinamyan, A.M. Mickaelian, Spectral observations of FBS blue stellar objects in the zone d = +35° // Astrophyiscs, Vol. 51, No. 2, p. 226-232, 2008.

 

2007                 Compilation and publication of the Optical Database and Atlas of Markarian galaxies. Data for 1549 objects are given (A.R. Petrosian, in collaboration with Space Telescope Science Institute, USA).

 

A.R. Petrosian, B. McLean, R.J. Allen, J.W. MacKenty, Markarian Galaxies. I. The Optical Database and Atlas // Astrophys. J. Suppl., Vol. 170, No. 1, p. 33-70, 2007.

 

2007                 Discovery of 28 highest IR/optical flux ratio extragalactic objects (having IR/opt up to 1110) by means of selection of sources from IRAS-FSC and observations with Spitzer Space Telescope (SST). The sample filled in the gap between the IRAS discovered ULIRGs and Spitzer discovered 24 mm sources at z~2. The highest luminosity ULIRG was found (10^46.6 erg/sec at 5.5 mm) (A.M. Mickaelian, L.A. Sargsyan, in collaboration with D.W. Weedman and J.R. Houck, Cornell University, USA).

 

L.A. Sargsyan, A.M. Mickaelian, D.W. Weedman, J.R. Houck, Spitzer IRS Spectra of Optically Faint IRAS Sources // Astrophys. J., Vol. 683, No. 1, p. 114-122, 2008.

 

2008                 Compilation and publication of the Revised and Updated Catalog of the FBS blue stellar objects. Multiwavelength data are given for 1103 objects (A.M. Mickaelian).

 

A.M. Mickaelian, Revised and Updated Catalogue of the FBS Blue Stellar Objects // Astron. J., Vol. 136, No. 3, p. 946–953, 2008. VizieR On-line Data Catalog: III/258.