At z=1, disk galaxies exhibit U-shaped stellar age profiles with turnover at the edge, indicating inside-out growth with approximately 300% mass increase in outer regions since z=0.
Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
4 Pith papers cite this work. Polarity classification is still indexing.
4
Pith papers citing it
abstract
Stars in disks of spiral galaxies are usually assumed to remain roughly at their birth radii. This assumption is built into decades of modelling of the evolution of stellar populations in our own Galaxy and in external systems. We present results from self-consistent high-resolution $N$-body + Smooth Particle Hydrodynamics simulations of disk formation, in which stars migrate across significant galactocentric distances due to resonant scattering with transient spiral arms, while preserving their circular orbits. We investigate the implications of such migrations for observed stellar populations. Radial migration provides an explanation for the observed flatness and spread in the age-metallicity relation and the relative lack of metal poor stars in the solar neighborhood. The presence of radial migration also prompts rethinking of interpretations of extra-galactic stellar population data, especially for determinations of star formation histories.
citation-role summary
background 1
citation-polarity summary
fields
astro-ph.GA 4years
2026 4verdicts
UNVERDICTED 4roles
background 1polarities
unclear 1representative citing papers
The Helix Nebula is a low-density, stratified object with near-solar oxygen abundance (8.7), a ~1 dex sulfur deficit, and moderate helium/nitrogen enrichment placing it near the Type I boundary, with abundance variations attributed to ionization structure rather than chemical inhomogeneity.
Simulations show Lindblad-resonance wrinkles from non-winding spirals are filled with zero-age stars on orbits normally occupied by much older populations, offering an age-based constraint on past transient spiral patterns.
Catalog of ~25,000 UV-detected star-forming clumps with age estimates in 17 nearby galaxies using UVIT data and public data release.
citing papers explorer
-
Investigating the young stellar populations and hierarchies in nearby galaxies with the UVIT. II. Presenting the properties of ~25,000 UV-detected star-forming clumps
Catalog of ~25,000 UV-detected star-forming clumps with age estimates in 17 nearby galaxies using UVIT data and public data release.