Astrophysical: Techniques

  • Publication
    Integral field spectroscopy of the planetary nebula NGC 3242 and the puzzling nature of its low-ionization structures
    Context. We investigate the physico-chemical properties of the planetary nebula (PN) NGC 3242 in both 1D and 2D, using integral field unit (IFU) data. This PN...
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    Integral field spectroscopy supports atmospheric optics to reveal the finite outer scale of the turbulence
    Context. The spatial coherence wavefront outer scale (ℒ 0) characterizes the size of the largest turbulence eddies in Earth's atmosphere, determining low...
  • Publication
    Integrated-light analyses vs. colour-magnitude diagrams. II. Leo A: an extremely young dwarf in the Local Group
    Context. Most of our knowledge of the stellar component of galaxies is based on the analysis of distant systems and comes from integrated light data. It is...
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    Interlocking Resonance Patterns in Galaxy Disks
    We have developed a method for finding dynamical resonances in disk galaxies using the change in sense of the radial component of the in-plane velocity at a...
  • Publication
    Intermediate Resolution Near-infrared Spectroscopy of 36 Late M Dwarfs
    We present observations of 36 late M dwarfs obtained with the Keck II/NIRSPEC in the J band at a resolution of ~20,000. We have measured projected rotational...
  • Publication
    Intermediate-mass stars and the origin of the gas-giant planet-metallicity correlation
    Context. Currently, the number of known planets around intermediate-mass stars (1.5 M ⊙ < M ⋆ < 3.5 M ⊙) is rather low. As a consequence, models of planet...
  • Publication
    Internal kinematics and physical properties of HII regions in the Arp 270 system
    We have observed Arp 270 using the GHαFaS Fabry-Perot spectrometer on the 4.2m William Herschel Telescope (La Palma). In the edge-on companion we detect a...
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    Internal Proper Motions in the Eskimo Nebula
    We present measurements of internal proper motions at more than 500 positions of NGC 2392, the Eskimo Nebula, based on images acquired with WFPC2 on board the...
  • Publication
    Interpolation of spectra from 3D model atmospheres
    Context. The use of 3D hydrodynamical simulations of stellar surface convection for model atmospheres is computationally expensive. Although these models have...