Armenian National Science & Education Fund (ANSEF)

Grant astroex-4193



Radio Properties of Active Galaxies

Principal Investigator: Hayk ABRAHAMYAN

Period: 01.01.2016-31.12.2016



Project Summary

We plan to study morphology and variability of radio sources. For that we use NVSS and FIRST catalogues for cross-correlation. NVSS (Condon et al. 1998) contains 1,773,484 sources and FIRST (Helfand et al. 2015) contains 946,432 sources. For the preliminary results we have 556,282 identifications. For these sources we have made multiwavelength (MW) investigations in all wavelength ranges. An attempt to find a connection between the radiation fluxes in different bands for different types of sources, and identify their characteristics, and thus confirm the candidate AGNs. Having MW information we will achieve:

  • Discovery of some 6000 variable radio sources at 1400 MHz;
  • Understanding on the types of variable radio sources having optical variability;
  • How radio variability depends on redshift;
  • How radio variability depends on optical variability;
  • How optical variability of these sources depend on redshift;
  • Optical classification of some variable radio sources;
  • Revision of some optical classifications having new spectra from SDSS;
  • How radio variability depends on IR, UV, X-ray fluxes;
  • Radio morphology;
  • Online catalogue of variable radio sources.



Team Members

Hayk ABRAHAMYAN, Project Scientist
Junior Researcher and PhD student at BAO. Member of ArVO research group, RA MES SCS Thematic Grant 15T-1C257 “Spectral and multiwavelength studies of Markarian Galaxies” (2015-2017) and BAO Plate Archive project (2015-2017). Winner of ArAS Annual Prizes for Young Astronomers 2013, was awarded GTTP Certificate (2015). Works in the fields of AGN and starburst galaxies, extragalactic radio sources, Markarian galaxies, QSOs, blazars.
 
Dr. Marietta GYULZADYAN, Project Scientist
Researcher at BAO. Member of ArVO research group, RA MES SCS Thematic Grant 15T-1C257 “Spectral and multiwavelength studies of Markarian Galaxies” (2015-2017) and BAO Plate Archive project (2015-2017). Lecturer of “Astronomy” at Yerevan Physical-Mathematical high school after A. Shahinian attached to YSU. Leader of Armenian students’ team at International Astronomical Olympiads (2007-presently), Jury member of the International Astronomical Olympiad (IAO) (since 2006), Jury member of the International Olympiad of Astronomy and Astrophysics (IOAA) (since 2012), GTTP Armenian Representative. Was awarded RA MES Gold Medal (2015) and GTTP Certificate (2011). Works in the fields of AGN and starburst galaxies, Markarian and SBS galaxies, IRAS galaxies, clusters of galaxies.
 
Gurgen PARONYAN, Project Scientist
Junior Researcher and PhD student at BAO. Member of ArVO research group, RA MES SCS Thematic Grant 15T-1C257 “Spectral and multiwavelength studies of Markarian Galaxies” (2015-2017) and BAO Plate Archive project (2015-2017). Head of BAO Plate Archive. Winner of ArAS Annual Prizes for Young Astronomers 2014. Works in the fields of AGN and starburst galaxies, X-ray properties of active galaxies, extragalactic radio sources, Markarian galaxies, QSOs, blazars.
 
Gor MIKAYELYAN