Press Release

NAS RA V. Ambartsumian Byurakan Astrophysical Observatory (BAO)
Press release 30.03.2019

RUBEN ANDREASYAN – 70

RUBEN ANDREASYAN – 70. Dr. Andreasyan, one of the actively working Byurakan astronomers is 70. He was born on March 27, 1949, in Yerevan. He has graduated from the Yerevan State University (YSU) in 1972. Since 1974, Andreasyan works at the Byurakan Astrophysical Observatory (BAO), first as assistant astronomer and junior research associate. In 1977-1980 Andreasyan took his post-graduate studies and in 1985 he successfully passed his Ph.D. thesis at BAO under the supervision of Prof. M.A. Mnatsakanian. Since 1990, he is a senior research associate, and in 2001-2004, he was the scientific secretary of BAO. From 2017 Head of Department Active Galaxies BAO.

Dr. Andreasyan’s main research interests are radio galaxies, galactic magnetic fields, pulsars. Among his important results one can mention:

• the study of the structure of the magnetic field of our Galaxy; suggestion of the two components model of the Galactic magnetic field, investigation of its structure in the direction of spiral arms;
• the 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.
• the study of the magnetic fields of extragalactic radio sources; derivation of a correlation between the directions of the magnetic fields and major axes, mechanism of formation of a dipole magnetic field, etc.
• the studies of extended extragalactic radio sources.

Andreasyan has published more than 65 papers in Astrophysics, Astrophys. Space Sci., Astron. Astrophys. Transactions, Communications of BAO, and other journals, as well as in proceedings of several international conferences. He has participated in a number of important international meetings, including the IAU XXIV General Assembly in Manchester (2000) and IAU XXVIII General Assembly in Beijing (2012), a few other IAU meetings and JENAMs.

He was awarded ANSEF grants in 2004 for his studies of the radio luminosity of pulsars and the distribution of interstellar electron density and in 2005 for the study of the 3D structure of the magnetic field of our Galaxy in 2011 for the study of physical and morphological differences in different type radio galaxies. 2001-2004, the leader of Armenian team of INTAS GRANT; 2002, NATO Collaborative Linkage grant. He has been actively involved in the French-Armenian collaboration (PICS and Jumelage), has been lecturing at the YSU and has been the supervisor of a number of MSc and PhD students. Andreasyan is a member of the European Astronomical Society (EAS) and a member of ArAS (since 1999).

We congratulate Dr. Andreasyan and wish him further fruitful research and new scientific results.

Meline Asryan