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A Search for Gas-Rich Dwarf Galaxies in the Local Universe with ALFALFA and the WIYN One Degree Imager

  • Authors: Katherine L. Rhode, Nicholas J. Smith, William F. Janesh, John J. Salzer, Elizabeth A. K. Adams, Martha P. Haynes, Steven Janowiecki, John M. Cannon

Katherine L. Rhode et al 2023 The Astronomical Journal 166 .

  • Provider: AAS Journals

Caption: Figure 8.

A recreation of Figure 5 from Applebaum et al. (2021), which shows V magnitude as a function of normalized distance for the dwarf galaxies in the Sandra and Elena simulations (blue and orange points, respectively). The dwarf galaxy candidates associated with the UCHVCs AGC 268071 and AGC 249525 are plotted on the figure (points with large error bars) for comparison. For both simulations, satellites are denoted with filled squares, field galaxies are shown as open squares, and backsplash galaxies are denoted with a star. For the optical counterparts to AGC268071 and AGC 249525, we plot the average of the ratios calculated from the bright and faint estimates of their photometric properties and use both estimates to bracket our uncertainty. The distance uncertainty for these two objects is determined by the distance over which each object is detected in our data (see Table 3). We note that the error bars representing the distance uncertainties for our dwarf galaxy candidates are not symmetric in this plot and in Figure 9 and 10. This reflects the fact that the significance of a given overdensity falls below the 90% or 80% threshold relatively quickly after the peak significance is reached, as the tip of the RGB in the CMD filter is shifted downward to fainter magnitudes and the handful of stars that make up a typical detected overdensity become too bright to coincide with the filter.

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