Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions

  title={Improving the full spectrum fitting method: accurate convolution with Gauss-Hermite functions},
  author={Michele Cappellari},
  journal={Monthly Notices of the Royal Astronomical Society},
  • M. Cappellari
  • Published 28 July 2016
  • Physics
  • Monthly Notices of the Royal Astronomical Society
I start by providing an updated summary of the penalized pixel-fitting (pPXF) method, which is used to extract the stellar and gas kinematics, as well as the stellar population of galaxies, via full spectrum fitting. I then focus on the problem of extracting the kinematic when the velocity dispersion $\sigma$ is smaller than the velocity sampling $\Delta V$, which is generally, by design, close to the instrumental dispersion $\sigma_{\rm inst}$. The standard approach consists of convolving… Expand

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