Adiabatic and post-adiabatic approaches to extreme mass ratio inspiral
Name
9789813226609_0208.pdf
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759.25 KB
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Adobe PDF
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Author(s)
Hughes, Scott A
Date Issued
November 2017
Journal
Fourteenth Marcel Grossmann Meeting
Publisher
World Scientific
Citation
Hughes, Scott A. “Adiabatic and Post-Adiabatic Approaches to Extreme Mass Ratio Inspiral.” The Fourteenth Marcel Grossmann Meeting,July 2015, Rome, Italy, World Scientific, November 2017. © 2018 The Editors
Version
Final published version
Abstract
Extreme mass ratio inspirals (EMRIs) show a strong separation of timescales, with the time characterizing inspiral, T i , much longer than any time To characterizing orbital motions. The ratio of these timescales (which is essentially an EMRI's mass ratio) can be regarded as a parameter that controls a perturbative expansion. Here we describe the value and limitations of an “adiabatic” description of these binaries, which uses only the leading terms arising from such a two-timescale expansion. An adiabatic approach breaks down when orbits evolve through resonances, with important dynamical and observational consequences. We describe the shortfalls of an approach that only includes the adiabatic contributions to EMRI evolution, and outline what must be done to evolve these systems through resonance and to improve our ability to model EMRI systems more generally.
MIT Department
Massachusetts Institute of Technology. Department of Physics
MIT Kavli Institute for Astrophysics and Space Research
Terms of Use
Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1142/9789813226609_0208
