MY PREVIOUS AND CURRENT RESEARCH

About 20 years of experience in theoretical particle/high-energy astrophysics and atomic and nuclear physics. Currently working on the models of cosmic-ray production and propagation, particle interactions with fields and matter, diffuse X-, and gamma rays, dark matter, gamma-ray emission from neutron stars, black holes, and AGNs. Work with which I have been involved has been picked up by the media on a couple of occasions: press coverage.

Past activities include studies of details of structure of He atom and kinetics of formation of muonic and hadronic atoms in He and H-He isotope mixtures, photonuclear reactions, and physics of hot quark-gluon matter.

See my papers on ADS.

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last update June 17, 2008 by imos


Particle/High-Energy Astrophysics and Nuclear Physics


Galactic cosmic rays and diffuse continuum gamma rays

In collaboration with A.Strong (MPE), we are developing a GALPROP model, a state-of-the-art numerical model and a computer code (C++) of cosmic ray propagation in the Galaxy and production of diffuse gamma rays. The model (and the code) is widely used as a basis for many studies in Astrophysics, Particle Physics, and Cosmology, such as search for Dark Matter signatures, origin of elements, the spectrum of Galactic and extragalactic diffuse gamma-ray emission, heliospheric modulation studies etc. The code or its parts are used by the members of major experimental collaborations, such as GLAST LAT, PAMELA, ACE, AMS, BESS, HEAT and requested by hundreds of other researchers world-wide.
In collaboration with S.G.Mashnik (LANL), we are working on the Nuclear Cross Section Project with an aim at the development of publicly available evaluated libraries of the nuclear cross sections for Astrophysical applications.

  • more about the GALPROP project

    REFERENCES, see also GALPROP Web-site

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    Press coverage

  • Interview for "Thomson Reuters" in "Emerging Research Fronts" 10/2009: html  or  pdf
  • Interview for "New Scientist" in the article " 'Frozen' stars could shed light on dark matter" 06/2008: html or  pdf
  • "CERN Courier" features our work in the article "Milagro maps out gamma-ray frontier" 06/2008: html  or  pdf
  • "SLAC Today" features our work in the article "Looking for New Light" 06/2008: html  or  pdf
  • Interview for "Grani.ru" in the article "Criticizing conclusions of Auger collaboration" 05/2008: html or  pdf
  • Interview for "New Scientist" in the article "Doubt cast on source of universe's mightiest particles" 05/2008: html or  pdf
  • Interview for "New Scientist" in the article "Universe's first stars may have been dark" 12/2007:  html  or  pdf
  • Interview for "SLAC Today" in the article "By the Light of the Moon" 10/2007: html  or  pdf
  • "Scientific American" in the article "Glow in the Dark" 4/2007: pdf
  • Interview for "SLAC Today" in the article "Hey, WIMPs: Beware of Dwarf" 3/2007: html  or  pdf
  • Interview for "Terra Nova" (Russian journal) in the article "Astrophysics Today" 3/2007: html  or  pdf
  • Interview for Finnish magazine "Tähdet ja Avaruus" (Stars and Space) 12/2006: pdf
  • "SLAC Today" features our work in the article "Gamma Rays from the Sun: A New Way for Looking at the Solar System" 10/2006: html  or  pdf
  • Interview for "New Scientist" in the article " 'Dark matter burners' - a new type of star?" 9/2006:  html  or  pdf
  • see also www.physorg.comwww.sciencenewsdaily.orgwordpress.com,  news.softpedia.com: htmlpdfwww.astroseti.orgnol.hurnd.cnews.ruwww.riasamara.ruwww.rosinvest.comwww.ukrindustrial.com 

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    Hot Quark-Gluon Matter Physics

    A new state equation for the quark-gluon matter has been proposed, where the interaction between quarks is described by a density-dependent "mean field". The obtained results (critical temperature, temperature dependence of the energy density and of the energy of an isolated quark) are in qualitative agreement with the lattice QCD predictions.
    The "threshold effect" in the inclusive spectra of mesons has been predicted. The calculated inclusive spectra and multiplicities of pi-, rho-, eta-mesons etc. are in a good agreement with the experimental data on nucleon-antinucleon annihilation at low energies.

    REFERENCES

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    Formation of the Muonic and Hadronic Atoms
    and Details of the He Atom Structure

    Muonic and hadronic atoms
    I have taken part in the study of kinetics and atomic capture of negative muons and hadrons (pions, kaons etc.) in helium and hydrogen-helium isotope mixtures using quantum coupling equations for the two-particle channel and ionization channels. This is of interest for such studies as the physics of hadronic atoms, details of atomic structure, and the muon catalized fusion.

    Details of He atom structure
    Together with my colleagues, I have studied the sensivity of triply differential generalized oscillator strengths and triply differential cross sections of ionization He(e,2e)He+ to various models of the He atom structure in the initial and final states using distorted waves in the first Born approximation.

    REFERENCES

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