Natural Sciences and Engineering  Professor of Astrophysics

Tinatin Kakhniashvili has received M.S. with honor in Physics (Theoretical Physics) from Tbilisi State University (Department of Physics), Georgia,  in 1984. She got her Ph.D. degree in Physics in 1988 from Space Research Institute (Moscow, Russia) under supervision of Igor Novikov and Vladimir Lukash. Since 1988 she works as a reseracher at Abastumani Astrophysical Observatory (Georgia). She has received Doctor of Sciences in Physics and Mathematics from Lebedev Physics Institute (Moscow, Russia). 2008 she started to work at Ilia State University – as an associated professor (2008-2011), and since 2011 til today as a professor. She is also adjunct professor at Laurentian University (Canada) and research faculty at Carnegie Mellon University (USA).

Scientific interests / research interests

  • Cosmology, Astroparticle Physics, Hydro and MHD Turbulence, Relativistic Astrophysics, Gravity

Featured publications

  • Kahniashvili, T., Brandenburg, A. Tevzadze, A., ““Evolution and Signatures of Primordial Magnetic Fields” 2015, Phys. Scripta submitted, arXiv: 1507.00510
  • Aiola, S. Wang, B., Kosowsky, A. Kahniashvili, T., Firoujahi, H., “Microwave Background Correlations from Dipole Modulation”, Phys. Rev. D. accepted, arXiv. 1506.04405
  •  Kisslinger, L. and Kahniashvili, T., “Polarized Gravitational Waves from Cosmological Phase Transitions”, Phys. Rev. D. accepted, arXiv. 1505. 03680.
  •  Kahniashvili, T, Kar, A., Lavrelashvili, G., Agarwal, N., Heisenberg, L., and Kosowsky, A., “Cosmic Expansion in Extended Quasidilaton Massive Gravity”, 2015, Phys. Rev. D. Rapid Communications, 91, 041301.
  •  Brandenburg, A., Kahniashvili, T., Tevzadze, A., “Non-helical Inverse Transfer of a Decaying Magnetic Field”, 2015, Phys. Rev. Lett. 114, 075001
  • Kahniashvili, T., Maravin, Yu.,Lavrelashvili, G., and Kosowsky, `A., `Primordial Magnetic Helicity Constraints from WMAP Nine-Years Data”, 2014, Phys. Rev. D. 90, 083004
  •  Avsajanishvili, O., Arhipova, N., Samushia, L. Kahniashvili, T., 2014, “Growth Rate in Dynamical Dark Energy Models”, The European Phys. J. C. 74, 11, 3127
  • Kahniashvili, T., Tevzadze, A., Brandenburg, A., and Neronov, A., 2013 “Evolution of Primordial Magnetic Fields from Phase Transitions”, Phys. Rev. D. 87, 083007
  • Kahniashvili, T., Maravin, Yu.,Natarajan, A., Battaglia, N., Tevzadze, A., 2013 “Constraining Primordial Magnetic Fields through Large Scale Structure”, Astrophys. J. 770, 47
  •  Campanelli, L, Fogli, G., Kahniashvili, T., Marrone, A., and Ratra, B. 2012, “Galaxy Cluster Number Count Data Constraints on Dark Energy”, The European Phys. J. 72, 2218
  • Kahniashvili, T., Brandenburg, A., Campanelli, L., Ratra, B., Tevzadze, A., 2012, “Evolution of Inflation-Generated Magnetic Field through Phase Transitions”, Phys. Rev. D. 86, 103005.
  •  Tevzadze, A., Kisslinger, L., Brandenburg, A., and Kahniashvili, T., 2012, “Magnetic Fields from QCD Phase Transitions”, Astrophys. J. 759, 54
  • Kosowsky A., and Kahniashvili, T. 2011, “The Signature of Local Motion in the Microwave Sky,” Phys. Rev. Lett . 106, 191301
  • Chitov, G., August, T., Natarajan, A., and Kahniashvili, T., 2011, “Mass Varying Neutrinos, Quintessence, and the Accelerating Expansion of the Universe,” Phys. Rev. D. 83, 045033
  •  Kahniashvili, T., Tevzadze, A. G., and Ratra, B., 2011 “Phase Transition Generated Magnetic Field at Large Scales”,Astrophys. J. 726, 78
  •  Kahniashvili, T., Tevzadze, A. G., Sethi, S. K., Pandey, K., and Ratra, B. 2010, “Primordial Magnetic Field Limits from Cosmological Data”, Phys. Rev. D 82, 083005
  • Kahniashvili, T., Brandenburg, A., Tevzadze, A. G., and Ratra, B., 2010, ”Numerical Simulations of the Decay of Primordial Magnetic Turbulence,” Phys. Rev. D 81, 123002
  •  Kahniashvili, T., Kisslinger, L., Stevens, T., 2010, “Gravitational Radiation Generated by the Cosmological Phase Transitions Magnetic Fields“, Phys. Rev. D 81, 023004
  •  Kahniashvili, T., Maravin, Yu.,Kosowsky, A., 2009, “Faraday Rotation Limits on a Primordial Magnetic Field from WMAP 5-years Data”, Phys. Rev. D. 80, 023009
  •  Kahniashvili, T., Campanelli, L., Gogoberidze, G., Yu. Maravin, and Ratra, B., 2008, “Gravitational Radiation from Primordial MHD Turbulence”, Phys. Rev. D. 78, 123006
  • Kahniashvili, T., Durrer, R., and Maravin, Yu., 2008, “Testing Lorentz Invariance through WMAP Five Years Data”, Phys. Rev. D. 78 123009
  •  Kahniashvili, T., Lavrelashvili, G., and Ratra, B., 2008, “CMB Temperature Two-Point Correlation functions in the Universe with broken Isotropy”, Phys. Rev. D, 78, 063012
  •  Kahniashvili, T., Kosowsky, A., Gogoberidze, G., and Maravin, Yu., 2008, “Detectability of Gravitational Waves from Phase Transitions”, Phys. Rev. D 78 043003.
  •  Kahniashvili, T., Gogoberidze, G., and Ratra, B. 2008, “Gravitational Radiation from Primordial MHD Turbulence”, Phys. Rev. Lett., 100, 231301
  •  Gogoberidze, G., Kahniashvili, T., and Kosowsky, A., 2007, “The Spectrum of Gravitational Radiation from Primordial Turbulence”, Phys. Rev. D., 76, 083002
  •  Baukh, V., Zhuk, A., and Kahniashvili, T., 2007, “Extra Dimensions and Lorenz Invariance Violation” Phys. Rev. D., 76, 027502
  • Kahniashvili, T. and Ratra, B., 2007, “CMB Anisotropies Due to Cosmological Magnetosonic Waves”, 2006, Phys. Rev. D. 75, 023002.
  •  Kahniashvili, T., Gogoberidze, G., and Ratra, B., 2006, “Gamma Ray Burst Constraints on Ultraviolet Lorentz Invariance Violation”, Phys. Lett. B., 643, 81
  •  Kahniashvili, T. and Vachaspati, T., 2006, “On the Detection of Magnetic Helicity”, Phys. Rev. D, 73 063507
  •  Kahniashvili, T., 2006, “Effects of cosmological Magnetic Helicity on CMB”, Astr. Nach. 327, 414.
  • Kahniashvili, T., Gogoberidze, G.,andRatra, B., 2005, “Polarized Cosmological Gravitational Waves from Primordial Helical Turbulence”, Phys. Rev. Lett. 95, 151301.
  •  Kahniashvili, T. and Ratra, B., 2005, “Effects of Cosmological Magnetic Helicity on the Cosmic Microwave Background Radiation”, Phys. Rev. D. 71, 103006
  •  Kahniashvili, T., 2005, “Cosmological Magnetic Fields vs. CMB”, New Astron. Rev. 49, 79
  •  Kahniashvili, T. 2006, “Effects of Primordial Helicity on CMB”, New Astron. Rev. 50, 1015
  • Kahniashvili, T., von Toerne, E., Arhipova, N., and B. Ratra, 2005, “Neutrino Mass Limit from Galaxy Cluster Number Density Evolution” Phys. Rev. D. 71, 125009
  •  Kosowsky, A., Kahniashvili, T., Lavrelashvili, G., and Ratra, B., 2005, “Faraday Rotation of Cosmic Microwave Radiation Polarization by Stochastic Magnetic Field”, Phys. Rev. D. 71, 043006
  • Chen, G., Mukharjee, P., Kahniashvili, T., Ratra, B, and Wang, Yu, 2004, “Looking for Cosmological Alfven Waves in WMAP Data”,Astrophys. J., 611, 655
  • Caprini, C., Durrer, R., and Kahniashvili, T., 2004, ”Cosmic Microwave Background and Helical Magnetic Fields: The Tensor Mode”, Phys. Rev. D., 69, 063006
  • Kosowsky, A., Mack, A., and Kahniashvili, T., 2002, “Gravitational Radiation from Cosmological Turbulence”, Phys. Rev. D., 66, 024030
  •  Arkhipova, N., Kahniashvili, T., and Lukash V.N., 2002, “Abundance and Evolution of Galaxy Clusters in Cosmological Models with Massive Neutrinos”, Astron. and Astroph., 386, 775
  •  Mack, A, Kahniashvili, T., and Kosowsky, A., 2002, “Vector and Tensor Microwave Background Signatures of a Primordial Magnetic Field”, Phys. Rev. D., 65, 123004
  •  Durrer, R., Ferreira, P., and Kahniashvili, T., 2000, “Tensor Microwave Anisotropies from a Stochastic Magnetic Field”, Phys. Rev. D. 61, 043001
  •  Valdarnini, R., Kahniashvili, T., and Novosyadlyj, B., 1998, “Large Scale Structure Formation in Mixed Dark Matter Models with a Cosmological Constant”, Astron. Astroph. 336, 11
  • Durrer, R., Kahniashvili T., and Yates, A., 1998, “Microwave Background Anisotropies from Alfven Waves”, Phys. Rev. D., 58, 123004
  •  Durrer, R., and Kahniashvili, T., 1998, “CMB Anisotropies Caused by Gravitational Waves: A Parameter Study”, Hel. Phys. Acta, , 71, 445
  • Kahniashvili, T., Machabeli G.Z., and Nanobashvili, I., 1997, “Generation of the Electrostatic Field in the Pulsar Magnetosphere Plasma”, Phys. Plasma, 4, 1132
  • Kahniashvili, T., Novosyadlyj, B., and Valdarnini, R., 1996, “Primordial Inhomogeneities Spectra in Mixed Dark Matter Models with a Cosmological constant”, Hel. Phys. Acta., 69, 219
  • Kahniashvili, T., and Lukash,V.N., 1996, “Creation of Potential Perturbations in the Universe Containing Weakly Interacting Particles”, J. Georgian Physical Society, 3, 56
  • Chedia, O., Kahniashvili, T., Machabeli, G.Z., and Nanobashvili, I., 1996, “Magneto-hydrodynamics of a Rotating Relativistic Plasma Stream”, J. Georgian Phys. Society, 3, 37
  •  Chedia, O., Kahniashvili, T., Machabeli, G.Z., and Nanobashvili, I., 1996, “On the Kinematics of a Co-rotating Relativistic Plasma Stream in the Perpendicular Rotator Model of a Pulsar magnetosphere”,Astrophys. Spa. Sci., 239, 54
  • Kahniashvili, T., 1990, “The Formation of the Spectra of the Pre-Galactic Inhomogeneities in the CDM and HDM Models”, Astron. Nachr., 311, 193
  •  Kahniashvili, T., Lominadze, J.G., Rogava, A., and Chagelishvili, G., 1990, “Generation of a Large-Scale Magnetic Field by Turbulence in a Relativistic Accretion Disk”, AAO bulletin, 68, 16

An extensive list of publications

Current Courses

Course Catalog

  • Physical Cosmology
  • General relativity
  • Introduction to Astrophysics
  • Introduction to Cosmology
  • The Universe: Origin, Evolution, and Structure