Download scientific diagram | Distribution histogram of old stellar population ages for E+As and ellipticals from 2-population fit with the PE model. We use bin=1Gyr for this...

Stellar population models combine energy and timescales of evolutionary phases from stellar evolution calculations with stellar spectral energy distributions. In this work we focus on the …

Stellar age is defined as the luminosity-weighted mean of an integrated population of stars, determined by the relative mass-fraction of old and young stars rather than the time of the last …

These data help us define the Bulge’s “X” shape, explore the distribution of stellar metallicities, and answer questions about the ages of stars in the Bulge.

Nov 1, 1994 · The construction of detailed models for intermediate and old stellar populations is described. Input parameters include metallicity (-2 less than (Fe/H) less than 0.5), single-burst …

Here one sees how some relatively small differences between stellar population models can change the ages derived from these indices. Here the models of Schiavon (2007) and those of …

May 24, 2018 · Here we re-evaluate the properties of old stellar populations using a new set of stellar population synthesis models, designed to incorporate the effects of binary stellar …

Feb 17, 2025 · By marginalizing over metallicity and extinction, we identify trends in the age distribution of the stellar population. For example, some blue stragglers appear along the MS. …

The determination of the age of the oldest objects in the Galaxy provides a lower limit to the age of the Universe, and this in turn can be used to constrain cosmological models and parameters, …

Stellar Population Mapping is a scientific process that categorizes the stars of the Milky Way Galaxy based on their location, composition, and age. This methodology helps astronomers …