NGC 6426: Colour-Magnitude diagram and variable star population as indicators of metallicity, distance, and age

arXiv:2610.11016 · astro-ph.GA, astro-ph.SR · Submitted 2026-10-07 · Read on arXiv

astro-ph.GA, astro-ph.SR

Submitted: 2026-10-07

Updated: 2026-10-07

Terminology

• Metallicity — 35× in this paper · explained in 3 episodes
• Calibration — 12× in this paper · explained in 7 episodes
• Horizontal Branch — 3× in this paper
• Abundance — 2× in this paper · explained in 1 episode
• Core — 2× in this paper · explained in 2 episodes
• Dartmouth Stellar Evolution Database — 2× in this paper
• First Overtone Red Edge — 2× in this paper
• Accuracy — 1× in this paper · explained in 1 episode
• Advanced Camera Survey — 1× in this paper
• Aperture — 1× in this paper · explained in 1 episode
• Colour Magnitude Diagram — 1× in this paper
• Hubble Space Telescope — 1× in this paper
• Main Ridge Line — 1× in this paper
• Markov Chain Monte Carlo — 1× in this paper
• Point Spread Function — 1× in this paper

Sources

• Variable stars in NGC 4147 revisited: RR Lyrae stars new CCD VI photometry and physical parameters
• Gaia Data Release 3: Summary of the content and survey properties
• Variable stars in the Globular Cluster NGC 2808
• The RR Lyrae variables and Horizontal Branch of NGC6656 (M22)

Related papers

• Apparent Stability in Self-Gravitating Turbulence and the Evolution of Molecular Clouds
• Two sets of potential-density basis pairs for the study of radial perturbations in collisionless spherical stellar systems
• Constraining reionization-era Ly alpha escape with JELS-MUSE: a highly complete H alpha-selected sample at z about6.1
• Deriving volume density profiles of filaments from observed surface densities
• Little Red Dots and Supermassive Black Hole Seed Formation in Ultralight Dark Matter Halos
• MEGATRON: how the first stars can create an iron metallicity plateau in the smallest dwarf galaxies