Polyachenko Evgeniy Valeriyevich General data:
Born: 18.07.1974
Place of birth: Irkutsk city, Irkutsk region, Russian SSR
Studied in: M. V. Lomonosov Moscow State University (1997);
Key interests: astrophysics, theoretical astrophysics, AGNs, Galaxy structure, theoretical physics. PhD Thesis: New Structures in Spiral Galaxies: Giant Cyclones and Slow Bars (2000 ); ScD Thesis: Collective phenomena and structures in spiral galaxies (2005 );
Biography:
He was born on July 18, 1974 in the Irkutsk city of Irkutsk region of the Russian SSR.
He graduated from the Department of Theoretical Physics of the Physics Faculty of M. V. Lomonosov Moscow State University in 1997.
Since 1999, he has been working at the Institute of Astronomy of the Russian Academy of Sciences.
He defended his candidate's thesis in 2000 on the topic: "New structures in spiral galaxies: giant cyclones and slow bars", his doctoral thesis - in 2005 on the topic: "Collective phenomena and structures in spiral galaxies".
Awarded the title of Honorary Doctor of the Main Astronomical Observatory of the National Academy of Sciences of Ukraine in 2014.
Author of more than 75 works in various fields of theoretical physics and astrophysics.
Currently, the main area of interest is stability theory and numerical modeling of gravitating systems.
Together with his father, V.L. Polyachenko developed the slow bar hypothesis, according to which bars in disk galaxies are formed due to the coalescence of orbits, and the rotation of the bar occurs at slow (precessional) velocities. In 2004, he formulated a unified theory of spiral structures, in which bars and spirals are considered as unstable modes of the stellar disk. The occurrence of the instability is related to the specific interaction of the mode and resonant stars and can mainly be explained by the mechanism of inverse Landau extinction.
In 2005, he developed linear matrix methods for the theory of stability of stellar and, in 2017, gas astrophysical disks.
Showed the possibility of bar formation in galaxies with a cusp and formulated a hypothesis about the late development of a bar. According to the hypothesis, an axially symmetric galactic disk remains stable (that is, it does not spontaneously form a bar), so far the mass of the disk does not exceed -80% of the current mass of the disk. Only after reaching this threshold (approximately 3-4 billion years ago), the bar begins to form and ends its formation only 1-2 billion years ago.
2007 together with V.L. Polyachenko and I.H. Schuhman obtained analogues of linear matrix equations for spherical systems and showed the possibility of the existence of a gravitational conical instability, similar to the instability in the simplest plasma traps.
In the period from 1999 to 2006, in co-authorship with A.M. Friedman and others participated in the study of various hydrodynamic instabilities within the framework of the theory of the formation of spiral arms of galaxies.
Sources:
1 ÏÎËß×ÅÍÊÎ Åâãåíèé Âàëåðüåâè÷//Àñòðîíîìû Ðîññèè 1917-2017/ íàó÷. ðåä. À.Ì.×åðåïàùóê, Êàçàíü, Êàçàí. ôåä. óí-ò, 2017.- 568ñ- C. 382
