|Arakelyan Marat (Arsen)|
|Armenian:||Առաքելյան Մարատ Արսենի|
|Russian:||Аракелян Марат Арсенович |
|Born:|| 15.01.1929 |
Goris, Republic of Armenia
|Died:|| 20.01.1983 |
Was born on January 15, 1929 in Goris, Armenian Soviet Republic. Died on January 20, 1983 in Moscow - the capital of Russia.
- In 1951 graduated from Yerevan State University.
- In 1966-1983 worked as a senior researcher in Byurakan's Astrophysical Observatory.
- In 1982-1983 worked as a Head of Department of Theoretical Physics and Astronomy in the Armenian State Pedagogical University.
- In 1973 became the member of International Astronomical Union.
- In 1978 became a Doctor of Physics and Mathematical Sciences.
- In was also a professor.
- His works are referred to the questions of spectral and statistical studies of galaxies. He charted the galaxies, which have high surface brightness, which are famous in literature with their name - "Arakelyan's Galaxies".
- Arakelyan M., Study of the luminosity function and the stellar space density in the solar neighbourhood, 1968.
- Arakelyan M., Study of the luminosity evolution of quasars based on the evolutionary effects associated with them, 1968-1969.
- Arakelyan M., Statistical study of flare stars in the solar vicinity, 1969-1970.
- Arakelyan M., Derivation of the luminosity function of field galaxies (together with A.T. Kalloghlian),1970.
- Arakelyan M., The proof of the extragalactic origin of quasars, 1970-1971.
- Arakelyan M., Spectroscopic observations and studies of a few hundred Markarian galaxies and discovery of more than 40 new Seyferts among them (together with Russian astronomers E.A. Dibai and V.F. Esipov), 1970-1973.
- Arakelyan M., Analysis of the surface brightness of emission-line galaxies (including Seyfert and Markarian ones) and development of method for revealing galaxies with high surface brightness, 1972-1974.
- Arakelyan M., Suggestion of a new method for definition of space density of extragalactic objects and estimation of the mean density of matter in the Metagalaxy, 1973.
- Arakelyan M., Compilation and publication of the catalogue of “Galaxies of high surface brightness” (named Arakelian galaxies, Akn), a list of 621 objects with surface brightness at least 22.0 magnitudes from an area of 1 sq. arcsec, 1975.
- Arakelyan M., Derivations of the luminosity function and space density of galaxies with UV continuum (Markarian galaxies), 1975.
- Arakelyan M., Spectroscopic observations and studies of Arakelian galaxies (galaxies with high surface brightness) and discovery of new Seyferts among them (together with E.A. Dibai and V.F. Esipov). The results were published in a series of 4 papers in Astrophysics, a paper in the Soviet Astronomical Circular, and were reported in the meeting “Stars and galaxies from observational points of view” in 1975, 1975-1976.
- Arakelyan M., Study of the dependence of the emission-line intensities of Markarian and Seyfert galaxies on their color index, 1976-1977.
- Arakelyan M., Study of the distribution of the mean surface brightness of galaxies in the Coma cluster, 1977.
- Arakelyan M., Study of the relation between the mean surface brightness and radio emission of galaxies, including Seyfert galaxies (together with R.A. Kandalyan), 1977-1980.
- Arakelyan M., Study of the estimations of the kinetic energies of clusters of galaxies; the extent to which a kinetic energy estimate would be affected by a possible mass dependence of the velocity dispersion of galaxies in clusters was considered, 1980.
- Arakelyan M., Radio (6cm) observations of Arakelian galaxies and publication of their accurate positions (together with US astronomers G. Kojoian, D.F. Dickinson, R. Elliott, M.D. Bicay), 1980-1981.
- Arakelyan M., Comparative study and statistics of the surface brightness and morphological types of isolated and double galaxies (together with A.P. Mahtessian), 1981-1982.
- Arakelyan M., Study of Seyfert galaxies in clusters and Seyfert properties of the cluster galaxies (together with V.Yu. Terebizh), 1981-1982.
- Arakelyan M., Proposing a method for construction of the luminosity function of the components of double galaxies on the basis of an arbitrary sample of pairs of galaxies. The results were applied to the data of Karachentsev's Catalog of Isolated Pairs, 1983.
- Arakelyan M., A method for the determination of the bivariate luminosity function utilizing an incomplete sample with an application to Seyfert galaxies. It was shown that the results of incomplete radio and X-ray surveys could be used for the determination of the bivariate luminosity functions, having both the distribution of luminosities of objects in the detected subsample and the distribution of apparent magnitudes in the surveyed sample, 1986.