Stellar Population Models and Individual Element Abundances II: Stellar Spectra and Integrated Light Models

Abstract

The first paper in this series explored the effects of altering the chemical mixture of the stellar population on an element by element basis on stellar evolutionary tracks and isochrones to the end of the red giant branch. This paper extends the discussion by incorporating the fully consistent synthetic stellar spectra with those isochrone models in predicting integrated colors, Lick indices, and synthetic spectra. Older populations display element ratio effects in their spectra at higher amplitude than younger populations. In addition, spectral effects in the photospheres of stars tend to dominate over effects from isochrone temperatures and lifetimes, but, further, the isochrone-based effects that are present tend to fall along the age-metallicity degeneracy vector, while the direct stellar spectral effects usually show considerable orthogonality.

Accepted for publication in the Astrophysical Journal. Supplemental materials can be found at http://astro.wsu.edu/hclee/NSSPM_II_Lick.html

References in corpus (12)

• Population Synthesis in the Blue IV: Accurate Model Predictions for Lick Indices and UBV Colors in Single Stellar Populations
• The star formation histories of galaxies in the Sloan Digital Sky Survey
• Spectral models for solar-scaled and alpha-enhanced stellar populations
• Measuring Ages and Elemental Abundances from Unresolved Stellar Populations: Fe, Mg, C, N, and Ca
• Nitrogen abundances in giant stars of the globular cluster NGC 6752
• Stellar Population Models and Individual Element Abundances I: Sensitivity of Stellar Evolution Models
• A new abundance scale for the globular cluster 47 Tuc
• Testing the Accuracy of Synthetic Stellar Libraries
• A new stellar library in the region of the CO index at 2.3 $\mu$m. New index definition and empirical fitting functions
• On the Age and Metallicity Estimation of Spiral Galaxies Using Optical and Near-Infrared Photometry
• An Improved Bandstrength Index for the CH G Band of Globular Cluster Giants
• H-delta in the Integrated Light of Galaxies: What Are We Actually Measuring?

Cited by in corpus (55)

• The propagation of uncertainties in stellar population synthesis modeling I: The relevance of uncertain aspects of stellar evolution and the IMF to the derived physical properties of galaxies
• The propagation of uncertainties in stellar population synthesis modeling III: model calibration, comparison, and evaluation
• Modeling the Panchromatic Spectral Energy Distributions of Galaxies
• Age-dating Luminous Red Galaxies observed with the Southern African Large Telescope
• The Stellar Initial Mass Function in Early-Type Galaxies From Absorption Line Spectroscopy. II. Results
• Evolutionary stellar population synthesis with MILES - II. Scaled-solar and α-enhanced models
• Galaxy Formation Theory
• Fitting the integrated Spectral Energy Distributions of Galaxies
• Counting Low-Mass Stars in Integrated Light
• A new library of theoretical stellar spectra with scaled-solar and alpha-enhanced mixtures
• Flux-calibrated stellar population models of Lick absorption-line indices with variable element abundance ratios
• Star formation history of barred disc galaxies
• Metal-rich, Metal-poor: Updated Stellar Population Models for Old Stellar Systems
• The Assembly Histories of Quiescent Galaxies Since z=0.7 from Absorption Line Spectroscopy
• A large stellar evolution database for population synthesis studies. V. Stellar models and isochrones with CNONa abundance anticorrelations
• Stellar Models with Enhanced Abundances of C, N, O, Ne, Na, Mg, Si, S, Ca, and Ti, in Turn, at Constant Helium and Iron Abundances
• Galactic chemical evolution in hierarchical formation models - I. Early-type galaxies in the local Universe
• A public catalogue of stellar masses, star formation and metallicity histories and dust content from the Sloan Digital Sky Survey using VESPA
• The Cluster Velocity Dispersion of the Abell 2199 cD Halo of NGC 6166
• Element abundances in the stars of the MILES spectral library: the Mg/Fe ratio
• Stellar Populations and the Star Formation Histories of LSB Galaxies: III. Stellar Population Models
• Photometric properties of stellar populations in Galactic globular clusters: the role of the Mg-Al anticorrelation
• Abundance patterns in early-type galaxies: is there a 'knee' in the [Fe/H] vs. [alpha/Fe] relation?
• Toward a Better Understanding of Cosmic Chronometers: Stellar Population Properties of Passive Galaxies at Intermediate Redshift
• To use or not to use synthetic stellar spectra in population synthesis models?
• Individual Alpha Elements, C, N, and Ba in Early Type Galaxies
• Yonsei Evolutionary Population Synthesis (YEPS) Model. I. Spectroscopic Evolution of Simple Stellar Populations
• The SLUGGS survey: Globular cluster stellar population trends from weak absorption lines in stacked spectra
• Full spectral fitting of Milky Way and M31 globular clusters: ages and metallicities
• Chemical abundance ratios of galactic globular clusters from modelling integrated light spectroscopy
• Ca, Fe, and Mg Trends Among and Within Elliptical Galaxies
• The WAGGS project - II. The reliability of the calcium triplet as a metallicity indicator in integrated stellar light
• The spatial distribution and origin of the FUV excess in early-type galaxies
• Integrated Stellar Populations: Confronting Photometry with Spectroscopy
• Are Dry Mergers Dry, Moist, or Wet?
• Stellar Population Trends in S0 Galaxies
• Tests of model predictions for the response of stellar spectra and absorption line indices to element abundance variations
• New Constraints on a complex relation between globular cluster colors and environment
• The Abundance Pattern in the Hot ISM of NGC 4472: Insights and Anomalies
• On the Anomalous Balmer Line Strengths in Globular Clusters
• The Next Generation Virgo cluster Survey (NGVS). XXVI. The issues of photometric age and metallicity estimates for globular clusters
• Effects of Alpha-Element Enhancement and the Thermally Pulsing-Asymptotic Giant Branch on Surface Brightness Fluctuation Magnitudes and Broadband Colors
• Comparison of Alpha-Element Enhanced Simple Stellar Population Models with Milky Way Globular Clusters
• The SAURON project-XXI. The spatially-resolved UV-line strength relations of early-type galaxies
• Emission Corrections for Hydrogen Features of the Graves et. al 2007 Sloan Digital Sky Survey Averages of Early Type, Non-liner Galaxies
• Composite Stellar Populations and Element by Element Abundances in the Milky Way Bulge and Elliptical Galaxies
• NH and Mg Index Trends in Elliptical Galaxies
• On Disentangling IMF Degeneracies in Integrated Light
• Individual element sensitivity for stellar evolutionary isochrones
• An empirical calibration of Lick indices using Milky Way Globular Clusters
• The impact of binary star yields on the spectra of galaxies
• Stellar models: firm evidence, open questions and future developments
• Generating on-the-fly large samples of theoretical spectra through N-dimensional grid
• UV bright red-sequence galaxies: a comparative study between UV upturn and UV weak systems
• Challenges in Stellar Population Studies