Image Details

Choose export citation format:

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 7.

The color–magnitude diagram for stars located within the 4 × r h ellipse of Virgo III, including the three detected RR Lyrae, which have been corrected for extinction. For the three RR Lyrae, we have also applied approximate color corrections to bring the single-epoch SDSS photometry close to the mean values. We assumed such corrections carry an error of ∼0.1 mag. The mean r-band magnitudes for them were taken from Table 3. The green curves are three evolutionary tracks for horizontal-branch (HB) models with mass (M) of 0.58, 0.64, and 0.70 M , taken from the BaSTI library. These HB models are α-enhanced (as found in many UFD; for a review, see Simon 2019), with [Fe/H] = −1.9 dex, and vertically shifted to the absolute magnitudes using the distance modulus derived in our work.

Other Images in This Article
Copyright and Terms & Conditions

Additional terms of reuse