sMILES SSPs: A Library of Semi-Empirical MILES Stellar Population Models with Variable [/Fe] Abundances
arXiv:2306.05942 · doi:10.1093/mnras/stad1647
Abstract
We present a new library of semi-empirical stellar population models that are based on the empirical MILES and semi-empirical sMILES stellar libraries. The models span a large range of age and metallicity, in addition to an [/Fe] coverage from 0.2 to 0.6 dex, at MILES resolution (FWHM=2.5) and wavelength coverage (3540.5-7409.6). These models are aimed at exploring abundance ratios in the integrated light from stellar populations in star clusters and galaxies. Our approach is to build SSPs from semi-empirical stars at particular [/Fe] values, thus producing new SSPs at a range of [/Fe] values from sub-solar to super-solar. We compare these new SSPs with previously published and well-used models and find similar abundance pattern predictions, but with some differences in age indicators. We illustrate a potential application of our new SSPs, by fitting them to the high signal-to-noise data of stacked SDSS galaxy spectra. Age, metallicity and [/Fe] trends were measured for galaxy stacks with different stellar velocity dispersions and show systematic changes, in agreement with previous analyses of subsets of those data. These new SSPs are made publicly available.
arXiv comment21 pages, 18 figures plus Supplementary Material. Accepted for publication in MNRAS
References in corpus (62)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- The chemical composition of the Sun
- On the variation of the Initial Mass Function
- MESA Isochrones and Stellar Tracks (MIST). I: Solar-Scaled Models
- MESA Isochrones and Stellar Tracks (MIST) 0: Methods for the construction of stellar isochrones
- Evolutionary population synthesis: models, analysis of the ingredients and application to high-z galaxies
- MILES: A Medium resolution INT Library of Empirical Spectra
- A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
- X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
- Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the Solar neighbourhood
- The Galactic disk mass function: reconciliation of the HST and nearby determinations
- Stellar population models of Lick indices with variable element abundance ratios
- Evolutionary Stellar Population Synthesis with MILES. Part I: The Base Models and a New Line Index System
- An updated MILES stellar library and stellar population models
- Old Stellar Populations. VI. Absorption-Line Spectra of Galaxy Nuclei and Globular Clusters
- A large stellar evolution database for population synthesis studies. II. Stellar models and isochrones for an alpha-enhanced metal distribution
- UV-extended E-MILES stellar population models: young components in massive early-type galaxies
- The Atlas3D Project - XXX. Star formation histories and stellar population scaling relations of early-type galaxies
- A library of high resolution synthetic stellar spectra from 300nm to 1.8 micron with solar and alpha-enhanced composition
- A new chemo-evolutionary population synthesis model for early-type galaxies. I: Theoretical basis
- Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
- The Updated BaSTI Stellar Evolution Models and Isochrones: I. Solar Scaled Calculations
- SPIDER VIII - Constraints on the Stellar Initial Mass Function of Early-type Galaxies from a Variety of Spectral Features
- Medium-resolution Isaac Newton Telescope library of empirical spectra - II. The stellar atmospheric parameters
- New ATLAS9 And MARCS Model Atmosphere Grids for the Apache Point Observatory Galactic Evolution Experiment (APOGEE)
- Counting Low-Mass Stars in Integrated Light
- A new chemo-evolutionary population synthesis model for early-type galaxies. II: Observations and Results
- A new library of theoretical stellar spectra with scaled-solar and alpha-enhanced mixtures
- The updated BaSTI stellar evolution models and isochrones: II. alpha-enhanced calculations
- Empirical calibration of the near-IR CaII triplet - IV. The stellar population synthesis models
- A comparison of stellar populations in galaxy populations across a wide range of Hubble types
- Spectral models for solar-scaled and alpha-enhanced stellar populations
- Metal-rich, Metal-poor: Updated Stellar Population Models for Old Stellar Systems
- A large stellar evolution database for population synthesis studies. V. Stellar models and isochrones with CNONa abundance anticorrelations
- The sensitivity of Lick indices to abundance variations
- A Robust Method for the Analysis of Integrated Spectra from Globular Clusters using Lick Indices
- Chemical element ratios of SDSS early-type galaxies
- A large stellar evolution database for population synthesis studies. IV. Integrated properties and spectra
- Radial constraints on the Initial Mass Function from TiO features and Wing-Ford band in Early-type Galaxies
- Confidence limits of evolutionary synthesis models. IV Moving forward to a probabilistic formulation
- Differential stellar population models: how to reliably measure [Fe/H] and [alpha/Fe] in galaxies
- Stellar population models based on the SDSS-IV MaStar library of stellar spectra. I. Intermediate-age/old models
- An optimized H_βindex for disentangling stellar population ages
- The BaSTI Stellar Evolution Database: models for extremely metal-poor and super-metal-rich stellar populations
- IMF and [Na/Fe] abundance ratios from optical and NIR Spectral Features in Early-type Galaxies
- Testing the Accuracy of Synthetic Stellar Libraries
- MILES extended: Stellar population synthesis models from the optical to the infrared
- Element abundances in the stars of the MILES spectral library: the Mg/Fe ratio
- Modelling simple stellar populations in the near-ultraviolet to near-infrared with the X-shooter Spectral Library (XSL)
- SPIDER X - Environmental effects in central and satellite early-type galaxies through the stellar fossil record
- To use or not to use synthetic stellar spectra in population synthesis models?
- Individual Alpha Elements, C, N, and Ba in Early Type Galaxies
- Ca, Fe, and Mg Trends Among and Within Elliptical Galaxies
- Initial Mass Function Variability (or not) Among \\ Low-Velocity Dispersion, Compact Stellar Systems
- sMILES: A Library of Semi-Empirical MILES Stellar Spectra with Variable [/Fe] Abundances
- Tests of model predictions for the response of stellar spectra and absorption line indices to element abundance variations
- Abundance ratios in dwarf elliptical galaxies
- Mild radial variations of the stellar IMF in the bulge of M31
- SDSS-IV MaNGA: The [/Fe] of Early-Type Galaxies
- Surface Brightness Fluctuation spectra to constrain stellar population properties
- Individual element sensitivity for stellar evolutionary isochrones
- Analysis of stellar populations with large empirical libraries at high spectral resolution
Cited by in corpus (13)
- TDCOSMO XIX. Measuring stellar velocity dispersion with sub-percent accuracy for cosmography
- CO radial gradients in the bulge of M31
- Feeding the Dead: Neutral Gas Inflow in a Long-Quenched Ancient Massive Galaxy at Observed with JWST/NIRSpec
- Looking into the faintEst WIth MUSE (LEWIS): on the nature of ultra-diffuse galaxies in the Hydra I cluster. V. Integrated stellar population properties
- Galaxy mass dependence of metal-enrichment of nuclear star clusters
- SMARTY: The mileS Moderate resolution neAr-infRared sTellar librarY
- Growing in number, passive in nature: tracing the evolution of the most massive quiescent galaxies since z ~ 0.8 with BOSS and DESI
- Towards Precision Cosmology With Improved PNLF Distances Using VLT-MUSE. III. Impact of Stellar Populations in Early-Type Galaxy
- Caveats about measuring carbon abundances in stars using the CH band
- A MaNGA about the Legacy I: Connecting the Assembly of Stellar Halo with the Average Star Formation History in Low-Redshift Massive Galaxies
- SPAN: A cross-platform Python GUI software for optical and near-infrared spectral analysis
- Cosmography via stellar archaeology of low-redshift early-type galaxies from SDSS
- The Nuclear Star Cluster of M 74: a fossil record of the very early stages of a star-forming galaxy