Montana State University

Department of Physics

Montana State University
P.O. Box 173840
Bozeman, MT 59717-3840

Tel: (406) 994-3614
Fax: (406) 994-4452
Location: EPS building, Room 264

Department Head:
Prof. Yves Idzerda

For suggestions or corrections to the Web site, email the


Kent Yagi, Ph.D -  Postdoctoral Research Associate

Email: You will need to type email address
Phone: 406-994-6286
Fax: 406-994-4452
EPS Room 220, MSU, Bozeman, 59717-3840, MT

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Curriculum Vitae


Selected Honors, Awards, and Public Outreach/Service:


  • ``Department of Physics 2014 Outstanding Technical Staff Award'' by the Montana State University Physics Department


  • A short essay contribution to ``The Birth of an Idea'' ( organized by Vitor Cardoso at University of Lisbon (2014)
  • An introductory lecture on gravitational waves to high school students from Kumamoto and Okinawa, Japan, at Montana State University (2012- 2014)
  • An introductory lecture on gravitational waves at Malmborg School, Bozeman, MT as a part of the ``Celebrating Einstein'' outreach event  (2013)


Biographical Sketch:

  • Ph.D. in Physics, Kyoto University, 2012
  • M.S. in Physics, Kyoto University, 2009
  • B.S. in Physics, Kyoto University, 2007 
  • Japan Society for the Promotion of Science (JSPS) Fellow, 2010-2012
  • TEIJIN Company Scholar, 2009-2010


My research interest is on probing fundamental physics such as gravitational and nuclear physics with gravitational waves and electromagentic observations. I mostly work on testing alternative theories of gravity using gravitational waves from a compact binary and binary pulsar observations. I also work on revealing cosmological and astrophysical information from gravitational waves with ground- and space-based gravitational-wave interferometers. My recent interest, in particular, is on measuring the equation-of-state of matters at nuclear and supra-nuclear densities with gravitational-wave observations, which is one of largest uncertainties in nuclear physics. We recently found very interesting/astonishing relations ("I-Love-Q" relations) among certain neutron-star observables that do not depend strongly on its internal structure. Such relations can be applied to astrophysics, nuclear phyiscs and gravitational physics.

Selected Publications:

  • Kent Yagi and Nicolas Yunes, "Love can be Tough to Measure", Phys. Rev. D89, 021303(R) (2014)
  • Kent Yagi et al. "Strong Binary Pulsar Constraints on Lorentz Violation in Gravity", Phys. Rev. Lett. 112, 161101 (2014)
  • Kent Yagi and Nicolas Yune, "I-Love-Q", Science 341, 365 (2013)
  • Kent Yagi, Nicolas Yunes and Takahiro Tanaka, "Gravitational Waves from Quasi-Circular Black Hole Binaries in Dynamical Chern-Simons Gravity", Phy. Rev. Lett. 109, 251105 (2012)   
  • Kent Yagi, "A New constraint on scalar Gauss-Bonnet gravity and a possible explanation for the excess of the orbital decay rate in a low-mass X-ray binary", Phy. Rev. D86, 081504(R) (2012) 
  • Kent Yagi et al., "Direct Measurement of the Positive Acceleration of the Universe and Testing Inhomogeneous Models under Gravitational Wave Cosmology,''  JCAP 1204, 031 (2012)
  • Kent Yagi, Norihiro Tanahashi and Takahiro Tanaka, "Probing the Size of Extra Dimension with Gravitational Wave Astronomy", Phy. Rev. D83, 084036 (2011)
  • Kent Yagi and Takahiro Tanaka, "Constraining Alternative Theories of Gravity by Gravitational Waves from Precessing Eccentric Compact Binaries with LISA", Phy. Rev. D81, 064008 (2010)

Selected Talks:

Invited/Plenary Talks:

  • ``Gravitational Tests of Lorentz Invariance'', Aug. 9-10 (2014), Indiana University, Bloomington, IN 
  • `Binary Neutron Star Coalescence as a Fundamental Physics Laboratory'',  June 30-Aug. 1 (2014), University of Washington, Seattle, WA
  • ``The Physical Society of Japan (JPS) Annual Meeting 2014'',  March 27-30 (2014), Tokai University, Shonan, Kanagawa, Japan
  • ``The 22nd workshop on General Relativity and Gravitation in Japan (JGRG22)'',  12-16 Nov. (2012), University of Tokyo, Tokyo, Japan
  • ``Fifth International ASTROD Symposium on Laser Astrodynamics, Space Test of Relativity and Gravitational-Wave Astronomy (ASTROD 5)'',  July 11-13 (2012), Raman Research Institute, Bangalore, India

Personal webpage updated: 9/28/2014 1:45:44 PM

Updated: September 2, 2014 12:06