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Discovery of RR Lyrae in the Ultra-faint-dwarf Galaxy Virgo III

  • Authors: Chow-Choong Ngeow, Anupam Bhardwaj

Chow-Choong Ngeow and Anupam Bhardwaj 2024 The Astronomical Journal 168 .

  • Provider: AAS Journals

Caption: Figure 8.

Number of RR Lyrae (N RRL) as a function of M V for the 94 galaxies listed in Table 4. To deal with the ”log of zero” problem on the y-axis (in log-scale), we added +1 to the N RRL. The green solid curve represents the empirical relation derived in Martínez-Vázquez et al. (2019). The dashed curve are for the different selected values of specific RR Lyrae frequency S RR. Several "outliers" are also marked in this plot. The inset figure is the zoomed-in version for UFD galaxies with N RRL < 7, where Virgo III is marked as a magenta star. For clarity, error bars and the curves for S RR < 1 are omitted in the inset figure. Note that the y-axis is in linear scale in the inset figure.

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