CURRICILUM
VITAE
|
|
Bobomurat AHMEDOV, Leading Scientist (Distinguished Research Professor)
Full Professor of Theoretical Physics
Leader of Research Projects
Head, Theoretical Astrophysics Sector Affiliated to AS-ICTP
Regular Associate of AS-ICTP
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SURNAME: FIRST NAMES: MIDDLE NAMES(s):
AHMEDOV Bobomurat Juraevich
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PLACE OF BIRTH (City and Country):
PRESENT NATIONALITY: DATE OF
BIRTH
Year - Month - Day:
Nationality at birth:
________________________________________________________________________________________________
SEX: MARITAL STATUS: NUMBER
OF CHILDREN AND THEIR AGE:
MALE married 3 children: 17, 13 and 10 years old
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FULL ADDRESS OF PERMANENT INSTITUTION:
Institute of Nuclear Physics, Uzbekistan Academy of Sciences | |
Ulughbek, Tashkent 100214, Uzbekistan | |
Telephone No: +998-71-2358102 Telefax No: +998-71-2360037 | |
E-mail: |
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HOME ADDRESS:
Center-5, 39/43,
Telephone No: +998-71-2355786
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MAILING ADDRESS: Ulugh Beg
Astronomical Institute
Astronomicheskaya 33
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EDUCATION (higher
degrees)
University or equivalent Years
attended Degrees
Name and place From to
student of
Physics Department
University Avenue 15
post-graduate student of
Ulughbek,
Physics Department
VUZgorodok
(Highest Degree)
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SCIENTIFIC
EMPLOYMENT AND ACADEMIC RESPONSIBILITY
Research Institution or
University Period
of duty Academic
Name and place From to responsibilities
Ulugbek,
1994
1996 Senior Researcher
1996
1999 Head of
Laboratory & Project
1999
2003
Leading Researcher
2003 now Head of Sector & Projects
University Avenue 15
Full Professor
Uzbekistan National University 2003 now Full Professor
VUZgorodok
Ulugh Beg Astronomical Institute 2003 now Project Leader
Astronomicheskaya 33
My present employment and duties:
My
main duty is to carry out the theoretical research in the field of
electrodynamics of continuous media in general relativity and relativistic
astrophysics. At present I am holding a position of Projects Leader and Head of
Sector of Theoretical Astrophysics (affiliated to the AS-ICTP, PRJ-29) in the
Institute of Nuclear Physics, position of Leading Researcher (half salary) and Projects
Leader at the Ulugh Beg Astronomical Institute in Tashkent and position of Full Professor (0.5 salary)
at the Uzbekistan National University. I
was co-organizer of Int. Symposium on
Experimental Gravitation held in
________________________________________________________________________________________________
SEMINARS, SUMMER
SCHOOLS AND CONFERENCES attended
Name and place Year
7th All-Union Gravitational Conference
8th Russian Gravitational Conference,
9th All-Union Workshop on Gravitation and
Electromagnetism,
All-Union Workshop on Relativistic Astrometry
International Symposium on Experimental
Gravitation,
International Friedmann Seminar on Cosmology
and Gravitation,
20th
and Contemporary Needs,
14th International Conference on General
Relativity and Gravitation,
24th International Cosmic Ray Conference
Roma 1995
5th
12th Italian Gravitational Conference,
15th International Conference on General
Relativity and Gravitation,
3rd W.Fairbank Mtg on Lense-Thirring Effect
Rome-Pescara 1998
WE-Heraeus Int. Seminar on Math Problems in
General Relativity,
19th
Astrophysics,
5th
3rd ICRA Network Workshop on Electrodynamics
and Magnetohydrodynamics around Black Holes
International Symposium on Experimental
Gravitation,
(co-organizer) 1999
Int. European Conference on Gravitation
Journees Relativistes 99,
International Conference on Gravitation and
Cosmology, Kharagpur, India 2000
Physics, Israel 2001
Int. Conference on Modern Problems of
Summer School on Black Holes
Bad-Honnef, Germany 2001
International Conference on Gravitation and
Cosmology,
Neutrino International Conference in Armenia
Yerevan
2005
11th Marcel Grossmann Meeting on General
Relativity, Berlin 2006
Summer School in Cosmology, AS-ICTP
XXVI General Assembly of International
Astronomical
AS-ICTP,
AS-ICTP,
Summer School in Cosmology, AS-ICTP
Advancing VLF Science through the
AWESOME Network
Workshop, Sebha, Libya
2008
3rd Stueckelberg Workshop on
Relativistic Field Theories
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My research is mainly devoted to the general-relativistic
electrodynamics of continuous media such as superconductor, conductor, plasma
etc and its application for theoretical explanation and analysis of
electromagnetic and astrophysical processes in the external gravitational
fields. Experimental tests of general relativity, general relativistic
electromagnetic effects and fields for pulsars and magnetized rotating and
oscillating neutron stars are also in my scientific interests.
RESUME OF CURRENT RESEARCH
The impact that stellar oscillations have on electric
and magnetic fields external to a relativistic magnetized star in vacuum has
been investigated. Modelling the star as a relativistic polytrope with infinite
conductivity, the solution of the general relativistic Maxwell equations both
in the vicinity of the stellar surface and far from it has been found. The
general relativistic energy loss through electromagnetic radiation for
different type (radial, toroidal and spheroidal) oscillations of relativistic
magnetized stars has been calculated.
General
relativistic expressions for the electric and magnetic fields interior
of oscillating conducting crust of magnetized neutron star with
politropic equation of state have been found.
Formalism describing electromagnetic
fields in inner parts of plasma magnetosphere of relativistic oscillating magnetized star has been developed. Multipolar expansion
of electromagnetic fields in plasma magnetosphere has been obtained using
quasistationarity of electromagnetic fields in the low current approximation.
The exact solutions for the unperturbed magnetic field and for the first order
pertubation in the displacement of the stellar matter have been obtained assuming that unperturbed magnetic field of
the star as dipolar one. Electric field
in plasma magnetosphere is decomposed as a sum of two terms: vacuum part is
defined by the function describing magnetic field and the second term (being
proportional to the gradient of the unknown scalar function) is responsible for
the contribution of charged particles.
Numerical solutions for space charge
density and electric field in plasma magnetosphere for various modes of
toroidal and spheroidal oscillations of Schwarzschild star have been obtained.
The results justify that near the surface of oscillating magnetized neutron
star the space charge density and electric field will be modified by monopolar
part of strong gravitational field.
Analytic general relativistic solutions for the
electromagnetic fields external to a slowly-rotating magnetized NUT star with nonvanishing
gravitomagnetic charge are found after separating the Maxwell equations in the
external background spacetime of a slowly rotating NUT star into angular and
radial parts in the lowest order approximation. The relativistic NUT star is
considered isolated and in vacuum, with different models for stellar magnetic
field: i) monopolar magnetic field and ii) dipolar magnetic field aligned with
the axis of rotation. It is shown that the
general relativistic corrections due to
gravitomagnetic charge are not present in the form of the stationary
magnetic fields but emerge only in the form of the electric fields. The
gravitomagnetic charge provides an
additional induced electric field being analogous to the one introduced by the rotation of
the star in the flat spacetime limit.
The
dipolar magnetic field configuration in dependence on brane tension and present
solutions of Maxwell equations in the internal and external background spacetime
of a magnetized spherical star in a Randall-Sundrum II type braneworld. The
star is modelled as sphere consisting of perfect highly magnetized fluid with
infinite conductivity and frozen-in dipolar magnetic field. With respect to
solutions for magnetic fields found in the Schwarzschild spacetime brane
tension introduces enhancing corrections both to the interior and the exterior
magnetic field. These corrections could be relevant for the magnetic fields of
magnetized compact objects as pulsars and magnetars and may provide the
observational evidence for the brane tension through the modification of
formula for magneto-dipolar emission which gives amplification of
electromagnetic energy loss up to few orders depending on the value of the
brane tension.
Interior electromagnetic fields
of a relativistic oscillating spherical star inside the perfectly
conducting crust of oscillating magnetized star in the interior Schwarzschild
metric in case of infinite conductivity are investigated. Analytical
expressions for interior electric and dipolar magnetic fields are obtained.
The general relativistic Ohm's law for the conduction current where the gravitomagnetic terms are incorporated has been derived. Then it is applied to predict a new galvano-gravitomagnetic effect, which takes place when a current carrying conductor is placed in a gravitomagnetic field. In connection with this galvanogravitomagnetic effect, the possibility of using current carrying conductors for detecting the Lense-Thirring field of the Earth was explored.
The general relativistic formula for charge distribution inside conductors has been derived from the Maxwell equations with the help of constitutive relations. The measurements of the general relativistic effect of charge redistribution inside conductors which can be performed within a conductor in the presence of gravitational field of a slow rotating metric source and an applied magnetic field both are proposed. It is shown that superconducting quantum interferometers could not detect the gravitomagnetism in the space of charged capacitor since they measure the quantity including the sum of electric and magnetic fields, and the general-relativistic magnetic part will be totally cancelled by the electric one which is in agreement with the experiments.
The appearance of general-relativistic contribution to the magnetic flux through a superconducting thermoelectric bimetallic circuit is shown. A response of the Josephson junctions to a heat flow is investigated in the generalrelativistic framework. Some gravitothermoelectric effects which can be observed in the superconducting state in the earth's gravitational field are considered.
Analytic solutions of Maxwell equations in the internal and external background spacetime of a slowly rotating misaligned magnetized neutron star have been obtained. With respect to a flat spacetime solution, general relativity introduces corrections related both to the monopolar and the dipolar parts of the gravitational field. In particular, in the case of infinite electrical conductivity general relativistic corrections due to the dragging of reference frames are present, but only in the expression for the electric field. In the case of finite electrical conductivity, however, corrections due both to the spacetime curvature and to the dragging of reference frames are shown to be present in the induction equation, which could be relevant for the evolution of the magnetic fields of pulsars and magnetars.
Electrostatic
plasma modes along the open field lines of a rotating neutron star and Goldreich-Julian
charge density in general relativity are analyzed for the neutron star with
zero inclination. It is found that the
charge density is maximum at the polar cap and it remains almost same in
certain extended region of the pole. For a steady state Goldreich-Julian charge
density the usual plasma oscillation along the field lines are found; plasma
frequency resembles to the gravitational redshift close to the Schwarzchild
radius. The nonlinear plasma mode along the field lines is studied. From the system
of equations under general relativity, a second order differential equation is
derived. The equation contains a term which describes the growing plasma modes
near Schwarzchild radius in a black hole environment. The term vanishes with
the distance far away from the gravitating object. For initially zero potential
and field on the surface of a neutron star, Goldreich-Julian charge density is
found to create the plasma mode, which is enhanced and propagates almost
without damping along the open field lines.
The equations that describe the electromagnetic processes in a plasma surrounding a neutron star are obtained by using the general relativistic form of Maxwell equations in a geometry of slow rotating gravitational object. A new mechanism of the generation of azimuthal current under the gravitomagnetic effect on radial current in a plasma around neutron star is predicted. The azimuthal current being proportional to the Lense-Thirring angular velocity can give valuable contribution on the evolution of the stellar magnetic field in some cases and therefore in general relativity a rotating neutron star, embedded in plasma, can in principle generate axial-symmetric magnetic fields even in axisymmetry.
The influence of the general-relativistic effects on charge distribution inside neutron star is investigated. The qualitative distinction of space charge distribution inside conducting crust from that inside superconducting core allows us to propose a possible mechanism of radio-wave radiation produced inside pulsar. A possibility of modelling this radiation in laboratory experiments in rotating frame of reference is analyzed.
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SCIENTIFIC PUBLICATIONS in the
last decade
1) In Refereed Journals:
2) In Proceedings:
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List
foreign research institutes visited:
Host Institute Duration of
visit Purpose
of visit
AS-ICTP few months each visit visitor/
in 1995,
1996, 1997, 1998, 1999, 2001, 2002, 2005, 2006, 2007, 2008
ICRA,
SISSA,
in 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,2008
MPI fur Gravitations few months/weeks each visit visitor
IIT,
in 2000
RCMPS,
two weeks
visitor
ZARM,
DLR,
Details of INDIVIDUAL AWARDS/RESEARCH GRANTS RECEIVED
International Science Foundation (ISF) Grant, 1994.
Award of
Leader
of Research Project "Mathematical Modelling
of Multiparticle High Energy Processes"
from the Uzbekistan Ministry of Science and
Technology,
Award of
Leader
of 4.5 Years Research Project "Study
of the Equations of Gravitation and Electrodynamics in Relativistic Astrophysics and
Cosmology" from the
Co-Leader
of 4.5 Years Research Project "Study
of the Dynamics of Gravitating Systems and Electromagnetic Processes in Vicinity of Compact
Objects" from the Uzbekistan Center of Science and Technology, Grant
F2.2.06, Tashkent, Uzbekistan (1
January 2003 - 30 June 2007).
Leader
of 2 Year Research Project "Vacuum
Solutions to the Equations of Einstein and Maxwell in Axial Symmetry" from the Foundation for Fundamental Studies of the Uzbekistan Academy of Sciences, Grant 2-04,
Tashkent, Uzbekistan (1 January 2004 -
31 December 2005).
CNR-NATO Grant (ranked
at the 1st place with 29/30 points), 2004.
NATO Reintegration Grant EAP.RIG.981259 “Electromagnetic Fields of
Magnetized Compact Stars in General Relativity”, 2004-2007.
TWAS Regular
Associate (
AS-ICTP Regular
Associate, Trieste, Italy, 2005-2010
Leader
of 3 Years Research Project
"Development of Methods for Extraction of Data for Earthquake Prediction
and Prognosis from Gravitational and Astrophysical Measurements" from the Uzbekistan Center of Science and
Technology, Grant A13-226, Tashkent,
Uzbekistan (1 January 2006 - 31 December
2008).
Leader
of 2 Year Research Project "General
Relativistic Effects in Models of Relativistic Stars with Cosmological Term and
Branes" from the Foundation for Fundamental Studies of the Uzbekistan Academy of Sciences, Grant 1-06,
Tashkent, Uzbekistan (1 January 2006 -
31 December 2007).
DAAD (
Leader
of 4.5 Years Research Project "Study
of the Equations of Electromagnetic and Gravitational Fields in Relativistic Astrophysics and Cosmology" from the Uzbekistan Academy of Sciences, Grant FA-F2-F079, Tashkent,
Uzbekistan (1 July 2007 - 31 December 2011).
Leader
of 2 Year Research Project "General
Relativistic Effects in Axial Symmetric Spacetimes" from the Foundation for Fundamental Studies of the Uzbekistan Academy of Sciences, Grant #5,
Tashkent, Uzbekistan (1 January 2008 -
31 December 2009).
Member of Scientific Council
awarding PhD degree in Astrophysics and Radioastronomy at the Uzbekistan
National Unversty (starting 2003).
Member of Scientific Council
at the Ulugh
Beg Astronomical Institute,
Member of Scientific Council
at the
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Teaching Experience
Winter-spring
term 1994: Course in Quantum Mechanics (92 lecture hours) for the 3rd year undergraduate
students, Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
1994: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring
term 1995: Course in Statistical Physics (90 lecture hours) for the 4th year undergraduate
students, Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
1995: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
1996: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring
term 1997: Course in General Relativity and Gravitation (60 lecture hours) for the 4th year undergraduate students (Bachelor Course), Chair of
Theoretical Physics, Faculty of Physics,
Winter-spring term
1998: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
1999: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
2000: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring
term 2001: Course in General Relativity and Gravitation (60 lecture hours) for the 4th year undergraduate students (Bachelor Course), Chair of
Theoretical Physics, Faculty of Physics,
Winter-spring term
2002: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Fall
term 2003: Course in Plasma Astrophysics (92 lecture hours) for the 1st year graduate
students (Master Course),
Chair of Astronomy, Faculty of Physics,
Fall
term 2003: Course in Quasars and Gravitational
Lensing (55 lecture hours) for
the 1st year graduate students
(Master Course), Chair of Astronomy, Faculty of Physics,
Fall
term 2003: Course in Cosmogony: Origin of planets,
Sun and stars (96 lecture hours)
for the 1st year graduate students
(Master Course), Chair of Astronomy, Faculty of Physics,
Winter-spring
term 2004: Course in General Relativity and Gravitation (Part I) – an introductionary course (50 lecture
hours) for the 3rd year undergraduate students
(Bachelor Course), Chair of Theoretical Physics, Faculty of Physics, Tashkent State University, Tashkent, Uzbekistan.
Winter-spring term
2004: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
2004: Course in Theoretical Mechanics (148 lecture hours) for the 2nd year undergraduate students (Bachelor Course), Chair of
Theoretical Physics, Faculty of Physics,
Fall
term 2004: Course in Electromagnetic Field Theory (60 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Fall
term 2004: Course in Plasma Astrophysics (92 lecture hours) for the 1st year graduate
students (Master Course),
Chair of Astronomy, Faculty of Physics,
Winter-spring term
2005: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
2005: Course in Cosmogony: Origin of planets,
Sun and stars (96 lecture hours)
for the 1st year graduate students
(Master Course), Chair of Astronomy, Faculty of Physics,
Winter-spring term
2005: Course in Interstellar Medium (32 lecture hours) for the 1st year graduate
students (Master Course),
Chair of Astronomy, Faculty of Physics,
Winter-spring term
2005: Course in General Relativity and Gravitation (69 lecture hours) for the 1st year graduate students (Master Course), Chair of Theoretical
Physics, Faculty of Physics,
Fall
term 2005: Course in Electromagnetic Field Theory (60 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
2006: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
2006: Course in General Relativity and Gravitation (69 lecture hours) for the 1st year graduate students (Master Course), Chair of Theoretical
Physics, Faculty of Physics,
Fall
term 2006: Course in Electromagnetic Field Theory (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring term
2007: Course in General Relativity and Gravitation (69 lecture hours) for the 1st year graduate students (Master Course), Chair of Theoretical
Physics, Faculty of Physics,
Winter-spring term
2007: Course in Electrodynamics of Continuous Media (69 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Fall
term 2007: Course in Electromagnetic Field Theory (63 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Fall
term 2007: Course in Cosmogony: Star Formation
Regions and Physics of Young Stars
(120 lecture hours) for the 1st year graduate students (Master Course), Chair of Astronomy, Faculty of
Physics,
Fall term 2007: Course in Interstellar Medium (48
lecture hours) for the 2nd year graduate students (Master Course), Chair of Astronomy, Faculty of
Physics,
Winter-spring term
2008: Course in General Relativity and Gravitation (65 lecture hours) for the 1st year graduate students (Master Course), Chair of Theoretical
Physics, Faculty of Physics,
Winter-spring term
2008: Course in Electrodynamics of Continuous Media (61 lecture hours) for the 3rd year undergraduate
students (Bachelor
Course), Chair of Theoretical Physics, Faculty of Physics,
Winter-spring
term 2008: Course in Statistical Physics and
Thermodynamics (66 lecture hours) for the 3rd
year undergraduate students (Bachelor Course), Chair
of Theoretical Physics, Faculty of Physics,
Winter-spring
term 2008: Course in Nonstationary Stars (56 lecture hours) for the 4th year undergraduate
students (Bachelor Course), Chair of Theoretical Physics, Faculty of Physics,
Fall
term 2008: Course in Statistical Physics and
Thermodynamics, I part (60 lecture hours) for
the 4th year undergraduate students
(Bachelor Course), Chair of Theoretical Physics, Faculty of Physics, Uzbekistan
National University, Tashkent, Uzbekistan.
Winter-spring
term 2009: Course in Statistical Physics and
Thermodynamics, II part (66 lecture hours) for
the 4th year undergraduate students (Bachelor Course), Chair of Theoretical Physics,
Faculty of Physics,
Winter-spring term
2009: Course in General Relativity and Gravitation (50 lecture hours) for the 1st year graduate students (Master Course), Chair of Theoretical
Physics, Faculty of Physics,
Winter-spring
term 2008: Course in Statistical Physics and
Thermodynamics (66 lecture hours) for the 3rd
year undergraduate students (Bachelor Course), Chair
of Theoretical Physics, Faculty of Physics,
1. B.J. Ahmedov, Problems of Relativity Theory and
Cosmology in XXI Century, Fan va Turmush, 2005, No.2-3, 22-27 (in Russian).
2.
B.J. Ahmedov, Yuldashev B.S.,
Modern Problems of Relativity Theory, Cosmology and Nuclear
Astrophysics, Bulletin of Uzbekistan
Nat. Univ., 2005, No. 3, 4-8 (in Russian).
3. B.J. Ahmedov, On “From Big Bang to the Nobel Prize…”,
Fan va Turmush, 2007, No.1-2, 60-61 (in Russian).
4. B.J. Ahmedov, Modern Problems of Relativity Theory, Plenary Talk given at the
National Conference devoted to 100 Anniversary of Relativity Theory,
5. B.J.
Ahmedov, Modern Problems of Astrophysics of Relativistic Compact Objects, Scientific-Popular
Talk given at the All-Institute Seminar of the Institute of Nuclear Physics,
Tashkent, March 2006.
BOBOMURAT AHMEDOV Date:
OCTOBER 1, 2008