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 wave and electromagnetic wave 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 nuclear matter with future 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 physics 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: 11/14/2014 10:37:07 PM

Updated: September 2, 2014 12:06