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The VIRUS-dE Survey. I. Stars in Dwarf Elliptical Galaxies—3D Dynamics and Radially Resolved Stellar Initial Mass Functions

  • Authors: Mathias Lipka, Jens Thomas, Roberto Saglia, Ralf Bender, Maximilian Fabricius, Gary J. Hill, Matthias Kluge, Martin Landriau, Ximena Mazzalay, Eva Noyola, Taniya Parikh, Jan Snigula

Mathias Lipka et al 2024 The Astrophysical Journal 976 .

  • Provider: AAS Journals

Caption: Figure 3.

The kinematic maps of the LOSVDs approximated by Gauss–Hermite expansion with fixed n GH = 4; i.e., this does not show potentially higher-order deviations. In a few bins, the recovered LOSVDs are essentially Gaussian because the optimum n GH was 2. This makes them appear white in the h 3,4-maps (the northernmost bin of VCC 200 was excluded due to its poor spectrum). We use a common spatial and color scale (see color bars on the right sides of the panels) to enable an easy comparison between different sample galaxies. Spatial variations within a given galaxy are more discernible in the radial profiles (Figure 4). In the velocity panels, we indicate north and east as well as the photometric 1.0r e aperture (dashed ellipse).

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