Status  Confirmed 
Seminar Series  RENCTHEO 
Subjects  hepth 
Date  Thursday 14 March 2019 
Time  10:00 
Institute  IHP 
Seminar Room  314 
Speaker's Last Name  Hartong 
Speaker's First Name  Jelle 
Speaker's Email Address  
Speaker's Institution  Edinburgh U. 
Title  Nonrelativistic Gravity 
Abstract  In this talk I will discuss the expansion of general relativity in inverse powers of the speed of light. This expansion can be truncated at any desired order and, when truncated at the next toleading order, it can be used to derive an action principle for a diffeomorphism invariant description of nonrelativistic gravity. This describes Newtonian gravity as well as strong gravity extensions thereof (e.g. due to time dilation effects). I will show how to couple such a theory to matter (point particles, scalar fields and fluids) and use this to show that the TolmanOppenheimerVolkov star solution and the Friedmann equations can both be viewed as solutions to the equations of motion of matter coupled nonrelativistic gravity. By looking at geodesics in a spherically symmetric background one can show that the phenomenon of perihelion precession is also described by this theory. Time permitting I will end with some comments about string and holographic extensions of these results. 
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