pySTARBURST99: The Next Generation of STARBURST99

Abstract

STARBURST99 is a population synthesis code tailored to predict the integrated properties or observational characteristics of star-forming galaxies. Here we present an update to STARBURST99 where we port the code to python, include new evolutionary tracks both rotating and non-rotating at a range of low metallicity environments. We complement these tracks with a corresponding grid of new synthetic SEDs. Additionally we include both evolutionary and spectral models of stars up to 300-500Msol. Synthesis models made with the python version of the code and new input stellar models are labelled pySTARBURST99. We make new predictions for many properties, such as ionising flux, SED, bolometric luminosity, wind power, hydrogen line equivalent widths and the UV beta-slope. These properties are all assessed over wider coverage in metallicity, mass and resolution than in previous versions of STARBURST99. A notable finding from these updates is an increase in H I ionising flux of 0.3 dex in the first 2Myr when increasing the upper mass limit from 120 to 300Msol. Changing metallicity has little impact on H I in the first 2Myr (range of 0.015 dex from Z = 0.02 to 0.0) but lower metallicities have higher H I by 1 dex (comparing Z = 0.02 to 0.0004) at later times, with Z = 0.0 having even higher H I at later times. Rotating models have significantly higher H I than their equivalent non-rotating models at any time after 2Myr. Similar trends are found for He I and He II, bolometric luminosity and wind momentum, with more complex relations found for hydrogen line equivalent widths and UV beta-slopes.

Accepted for publication in ApJS, 14 pages (50 including appendix), 15 figures (44 including appendix)

References in corpus (42)

• Binary interaction dominates the evolution of massive stars
• 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
• Pre-Supernova Evolution of Massive Single and Binary Stars
• Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results
• The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit
• UV-extended E-MILES stellar population models: young components in massive early-type galaxies
• The Effects of Stellar Rotation. II. A Comprehensive Set of Starburst99 Models
• The empirical metallicity dependence of the mass-loss rate of O- and early B-type stars
• Mass loss from late-type WN stars and its Z-dependence: very massive stars approaching the Eddington limit
• GALEV evolutionary synthesis models - I. Code, input physics and web-interface
• The most massive stars in the Arches cluster
• The updated BaSTI stellar evolution models and isochrones: II. alpha-enhanced calculations
• The Low-Redshift Lyman Continuum Survey I: New, Diverse Local Lyman-Continuum Emitters
• The evolution of rotating very massive stars with LMC composition
• The VLT-FLAMES Tarantula Survey XVII. Physical and wind properties of massive stars at the top of the main sequence
• On the consistent treatment of the quasi-hydrostatic layers in hot star atmospheres
• Nitrogen enhancements 440 Myr after the Big Bang: super-solar N/O, a tidal disruption event or a dense stellar cluster in GN-z11?
• Grids of stellar models with rotation IV. Models from 1.7 to 120 Msun at a metallicity Z = 0.0004
• Ultra-luminous X-ray sources and neutron-star-black-hole mergers from very massive close binaries at low metallicity
• Metallicity-dependent wind parameter predictions for OB stars
• The very massive binary NGC3603-A1
• Grids of stellar models with rotation VI: Models from 0.8 to 120 $M_{\odot }$ at a metallicity Z = 0.006
• The contribution from stars stripped in binaries to cosmic reionization of hydrogen and helium
• Winds of low-metallicity OB-type stars: HST-COS spectroscopy in IC1613
• Grids of stellar models with rotation: V. Models from 1.7 to 120 Msun at zero metallicity
• No breakdown of the radiatively-driven wind theory in low-metallicity environments
• The fates of massive stars: exploring uncertainties in stellar evolution with METISSE
• Grids of stellar models with rotation VII: Models from 0.8 to 300 M${}_{\odot }$ at super-solar metallicity (Z = 0.020)
• A systematic study of the escape of LyC and Ly$\alpha$ photons from star-forming, magnetized turbulent clouds
• Resolving the core of R136 in the optical
• The Redshift Evolution of Rest-UV Spectroscopic Properties to z~5
• Spectroscopic evolution of very massive stars at Z = 1/2.5 Zsun
• A synthetic population of Wolf-Rayet stars in the LMC based on detailed single and binary star evolution models
• Atmospheric NLTE models for the spectroscopic analysis of blue stars with winds. V. Complete comoving frame transfer, and updated modeling of X-ray emission
• Inferring the presence of very massive stars in local star-forming regions
• Stromlo Stellar Tracks: non-solar scaled abundances for massive stars
• Extreme broad He\2 emission at high and low redshifts: the dominant role of VMS in NGC 3125-A1 and CDFS131717
• Wind properties of Milky Way and SMC massive stars: empirical Z dependence from CMFGEN models
• HR-pyPopStar: high wavelength-resolution stellar populations evolutionary synthesis model
• X-Shooting ULLYSES: Massive stars at low metallicity. IV. Spectral analysis methods and exemplary results for O stars
• Bringing Stellar Evolution & Feedback Together: Summary of proposals from the Lorentz Center Workshop, 2022
• Very massive stars at low metallicity: evolution, synthetic spectroscopy, and impact on the integrated light of starbursts

Cited by in corpus (1)

• SDSS-V LVM: Resolving Physical Conditions in the Trifid Nebula