ArVO Group Main Achievements

 

Discovery and Identification of New Objects

 

·         1103 FBS Blue Stellar Objects (BSOs), including more than 700 new ones (A.M. Mickaelian)

·         1047 FBS late-type stars, including more than 500 new ones and 95 high galactic latitude carbon stars (K.S. Gigoyan)

·         3607 SBS galaxies and stellar objects (L.K. Erastova et al.)

·         42 new bright AGN (QSOs and Seyferts) among the FBS BSOs (A.M. Mickaelian et al.)

·         Hundreds of new white dwarfs and hot subdwarfs among the FBS BSOs (A.M. Mickaelian, P.K. Sinamyan)

·         New cataclysmic variables among the FBS BSOs (A.M. Mickaelian et al.)

·         Discovery of a new rare bright cataclysmic variable RXS J1643.7+3402: SW Sex sub-class Nova-like CV (A.M. Mickaelian et al.)

·         Discovery of 2 Novae among the FBS BSOs (with amplitude of ~8 mag.) (A.M. Mickaelian)

·         Spectroscopic studies of a large number of FBS late-type stars and discovery of 2 new carbon dwarfs out of 45 known ones (K.S. Gigoyan)

·         Discovery of an extreme object FBS 2213+421 (post Asymptotic Giant Branch (post-AGB) and pre-planetary nebula) (K.S. Gigoyan)

·         Discovery of a number of Mira type and semi-regular variables among the FBS late-type stars (K.S. Gigoyan)

·         Discovery of a very high PM star (5.13 as/yr) among FBS late-type stars (FBS 0250+167) (K.S. Gigoyan, A.M. Mickaelian)

·         1577 IRAS unidentified IR sources; 1279 galaxies (BIG objects) (A.M. Mickaelian, L.A. Sargsyan, et al.) and 287 (BIS objects) (A.M. Mickaelian, K.S. Gigoyan)

·         New bright AGN (Seyferts and LINERs) and ULIRGs among BIG objects (A.M. Mickaelian, L.A. Sargsyan, et al.)

·         Dozens of new pairs and multiple galaxies among IRAS sources (A.M. Mickaelian, L.A. Sargsyan, et al.)

·         Discovery of IRAS F18187+6304: a puzzling PMS emission line star with circumstellar envelope among BIS objects (A.M. Mickaelian, K.S. Gigoyan et al.)

·         3212 ROSAT FSC X-ray sources (2002, A.M. Mickaelian et al.)

·         New bright AGN (QSOs and Seyferts) among X-ray sources (A.M. Mickaelian et al.)

·         2791 ROSAT FSC X-ray sources (BHRC objects, 2004, A.M. Mickaelian, L.R. Hovhannisyan, et al.)

·         Pairs and multiple (interacting) galaxies among ROSAT sources (A.M. Mickaelian, et al.)

·         28 highest IR/opt flux ratio extragalactic sources selected from IRAS FSC and observed with SST (A.M. Mickaelian, L.A. Sargsyan et al.)

·         237 Spitzer Space Telescope (SST) stellar sources in Boцtes and FLS (A.M. Mickaelian, L.R. Hovhannisyan et al.)

·         Discovery of 21 hot debris disk stars among Spitzer sources (A.M. Mickaelian, L.R. Hovhannisyan et al.)

·         330 IRAS / 2MASS / FIRST / SDSS selected galaxies, a new sample for comparative study of properties of IR sources (A.M. Mickaelian, L.A. Sargsyan et al.)

 

Astrophysical and Statistical Results

 

·         Re-estimation of the completeness of BQS (53%) and estimation of the surface density of bright QSOs/AGN (0.012 deg-2) (A.M. Mickaelian et al.)

·         Complete AGN classification for HyperLEDA database (A.M. Mickaelian)

·         Areas on J-K vs. R-K color-color diagrams have been defined where proper motion objects are well distinguished (K.S. Gigoyan)

·         Optical identification of ROSAT sources and estimation of the abundance of various types of objects among X-ray sources (A.M. Mickaelian, L.R. Hovhannisyan et al.)

·         Discovery of new types of X-ray sources: interacting galaxies (A.M. Mickaelian)

·         Estimation of the maximum luminosity of a single spiral galaxy (1012 L) (A.M. Mickaelian et al.)

·         Discovery of the highest IR/opt flux ratio (40-1000) extragalactic objects (A.M. Mickaelian, L.A. Sargsyan et al.)

·         Determination of star-formation rate of galaxies by UV, IR, and radio (L.A. Sargsyan et al.)

·         Validity of IR PAH 7.7 micron flux calibration of star-formation rate has been confirmed (L.A. Sargsyan et al.)

·         Empirical measure of extinction in galaxies in the UV (L.A. Sargsyan et al.)

·         It was confirmed that IR selected starbursts are not significantly more dusty than the UV selected ones (L.A. Sargsyan et al.)

·         Definition of HINERs (High Ionization Nuclear Emission-Line Regions) (A.M. Mickaelian)

·         Establishment of accurate magnitudes for AGN and the first statistical study of AGN catalog (A.M. Mickaelian)

·         Discovery of the spectral variability of Akn 564; fine analysis of emission lines (A.M. Mickaelian et al.)

·         Discovery of the spectral variability of Kaz 102; fine analysis of emission lines (A.M. Mickaelian et al.)

·         Study of interrelationship of AGN / interaction / starburst phenomena for IRAS galaxies (A.M. Mickaelian)

 

Technical and Methodological Developments

 

·         Working out methods for accurate measurements of coordinates from POSS

·         Working out methods for optical identifications of IRAS point sources by means of low-dispersion spectra

·         Working out new methods for optical identifications of ROSAT point sources by means of HQS and other databases

·         Modification of automated reduction package in ESO-MIDAS for BAO 2.6m telescope

·         Introducing ESO-MIDAS and SPECTRAI in Byurakan

·         Working out methods for digitization of astronomical plates

·         Working out methods for astrometric solution of astronomical plates

·         Development of methods for cross-correlation of astronomical catalogs

·         Working out methods for classification of low-dispersion spectra

·         Automatic reduction and classification of the digitized 2.6m telescope spectra

·         Classification of active galaxies by their Spectral Energy Distribution (SED) using SDSS and 2MASS data

·         Installation of DFBS web portal and ArVO server on ArmCluster; VO in GRID

·         Introducing SST reduction software SMART in Byurakan

·         Working out methods for calculation of most possible accurate proper motions and variability

 

Initiated Projects and Novelties

 

·         Polarimetric observations of FBS BSOs with BAO 2.6m telescope

·         First research and introducing new field of Infrared Astronomy in Byurakan

·         Project of optical identifications of IRAS PSC sources

·         First research and introducing new field of X-ray Astronomy in Byurakan

·         Project of optical identifications of ROSAT FSC sources

·         First multiwavelength studies of galactic and extragalactic objects

·         Multiwavelength astronomy at BAO: multiwavelength surveys for new bright AGN

·         Search for extremely red objects in 2MASS

·         Digitized First Byurakan Survey (DFBS); first large digitization project

·         Digitization of photographic slit spectra obtained with BAO 2.6m telescope

·         Armenian Virtual Observatory (ArVO) and its acceptance in IVOA

·         AGN classification in HyperLEDA database

·         Comparative analysis of large databases (for derivation of high IR/opt flux ratio objects, etc.)

 

ArVO group main products

 

·         Catalog of FBS blue stellar objects (Mickaelian 2008, AJ 136, 946)

·         Catalog of FBS late-type stars (Gigoyan & Mickaelian 2012, MNRAS 419, 3346)

·         Catalog of Byurakan-IRAS Galaxies (Mickaelian 2012)

·         Catalog of Byurakan-IRAS Stars (Mickaelian & Gigoyan 2006, A&A 455, 765)

·         Catalog of Byurakan/Hamburg/ROSAT sources (Mickaelian et al. 2006, A&A 449, 425)

·         DFBS web site at http://www.aras.am/Dfbs/dfbs.html

·         DFBS web portal at La Sapienza Universita di Roma at http://byurakan.phys.uniroma1.it/

·         ArVO web site at http://www.aras.am/ArVO/arvo.htm

·         DFBS book (Eds. Massaro, Mickaelian, Nesci, Weedman, Aracne Editrice, Rome, 2008)