Thibault Paumard: Regularized OSIRIS 3D spectroscopy at the Circumnuclear Disk ionization front

CND
  • clumpy, but how clumpy?
  • self-gravitating, n~10^8?
  • examine small-scale structures in CND + clump-size power spectrum
Method description
  • noisy image: difficult to fit
  • smoothing bad: spectral resolution varies across OSIRIS field + really, really ugly spectral resolution map
  • Smoothing "during fitting"
  • GOAL: maps of velocity, width, density + similar to deconvolution
  • decomposed into linewidth, centroid, and amplitude + High, narrow peaks
Result
  • HII / H2 decorrelated + BrG traces low-H2 regions
  • thin filaments with narrow line widths

Questions

  • Q Farhad: Any asymmetric velocity profiles towards positions, i.e. outflow signatures?
  • A: No asymmetry noted.
  • Q: How unique is the solution?
  • A: If S/N good, fairly unique

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