Binary Population and Spectral Synthesis Version 2.1: Construction, Observational Verification, and New Results

By J. Eldridge, E. Stanway, L. Xiao, L. McClelland, G. Taylor, M. Ng, S. Greis, J. Auckland, Nz, U. Warwick and 1 more. Publications Astronomical Society of Australia, 2017

610 citations recorded by the source corpus.

Abstract The Binary Population and Spectral Synthesis suite of binary stellar evolution models and synthetic stellar populations provides a framework for the physically motivated analysis of both the integrated light from distant stellar populations and the detailed properties of those nearby. We present a new version 2.1 data release of these models, detailing the methodology by which Binary Population and Spectral Synthesis incorporates binary mass transfer and its effect on stellar evolution pathways, as well as the construction of simple stellar populations. We demonstrate key tests of the latest Binary Population and Spectral Synthesis model suite demonstrating its ability to reproduce the colours and derived properties of resolved stellar populations, including well-constrained eclipsing binaries. We consider observational constraints on the ratio of massive star types and the distribution of stellar remnant masses. We describe the identification of supernova progenitors in our models, and demonstrate a good agreement to the properties of observed progenitors. We also test our models against photometric and spectroscopic observations of unresolved stellar populations, both in the local and distant Universe, finding that binary models provide a self-consistent explanation for observed galaxy properties across a broad redshift range. Finally, we carefully describe the limitations of our models, and areas where we expect to see significant improvement in future versions.

Subfields: Astronomy and Astrophysics, Instrumentation

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In Astronomy and Astrophysics

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4. L. Hernquist
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6. R. Dav'e
7. J. Dunlop
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Citations in the corpus

• Re-evaluating old stellar populations (2018, background): “Amongst these are our Binary Population and Spectral Synthesis (BPASS, Eldridge & Stanway 2009, 2012; Eldridge et al. 2017) models, which have proven remarkably successful at matching the properties of young stellar populations (<100 Myr) across a broad range of environments and redshifts (e.g.…”
• The Keck Lyman Continuum Spectroscopic Survey (KLCS): The Emergent Ionizing Spectrum of Galaxies at z ∼ 3 (2018, methodology): “1 (Eldridge et al. 2017) models with stellar metallicity Z∗ = 0.001 (' 0.07 Z , assuming the solar abundance scale of Asplund et al. 2009), IMF slope α = −2.35, and upper stellar mass limit of 300 M (hereafter referred to as BPASSv2.”
• Progenitors of gravitational wave mergers: binary evolution with the stellar grid-based code ComBinE (2018, neutral): “…et al. 2008; Dominik et al. 2013, 2015; Chruslinska et al. 2018), binary c (Izzard et al. 2004, 2006, 2009, 2018), BPASS (Eldridge & Stanway 2016; Eldridge et al. 2017), COMPAS (Stevenson et al. 2017a; Barrett et al. 2017; Vigna-Gómez et al. 2018), MOBSE (Mapelli et al. 2017; Giacobbo et al.…”
• COSMIC Variance in Binary Population Synthesis (2019, methodology): “…1995; Nelson & Eggleton 2001), the Brussels population number synthesis code, PNS (De Donder & Vanbeveren 2004), BINSTAR (Siess et al. 2013), MESA (Paxton et al. 2011, 2013, 2015, 2018, 2019), or BPASS (Eldridge & Stanway 2016; Stanway et al. 2016; Eldridge et al. 2017; Stanway & Eldridge 2018).”
• Prospects for observing and localizing gravitational-wave transients with Advanced LIGO, Advanced Virgo and KAGRA (2013, methodology): “Studies of burst localization usingBayesWave in the first year of the advanceddetector era, and using cWB and LIB in the first two years have been completed in Bécsy et al. (2016) and Essick et al. (2015), respectively.”
• Merging black hole binaries with the SEVN code (2018, background): “…to fitting formulas consist in integrating stellar evolution on the fly (e.g. MESA, Paxton et al. 2011, 2013, 2015; BPASS, Eldridge & Stanway 2016; Eldridge et al. 2017) or in reading stellar evolution from look-up tables (e.g. SEVN Spera et al. 2015; Spera & Mapelli 2017; COMBINE, Kruckow et al.…”
• The lifecycle of molecular clouds in nearby star-forming disc galaxies (2019, background): “8 Binaries are not included in the adopted SPS model, but they may prolong the emission of ionising photons and increase tstar,ref , because stars in binaries may be tidally stripped, thus exposing their hot interiors (Eldridge et al. 2017; Götberg et al. 2019).”
• The evolution of the galaxy UV luminosity function at redshifts z ≃ 8 – 15 from deep JWST and ground-based near-infrared imaging (2022, background): “This extends the lifetimes of very massive stars, increasing the luminosity of young stellar populations (e.g. Eldridge et al. 2017), potentially resulting in a reduction of our stellar mass estimate.”
• An Older, More Quiescent Universe from Panchromatic SED Fitting of the 3D-HST Survey (2018, background): “While the physical mechanisms are distinct, the net effect on galaxy SEDs is similar to but weaker than the effect of stellar binaries (Eldridge et al. 2017).”
• Stellar Population Inference with Prospector (2020, methodology): “Those libraries are supplemented with the TP-AGB library from Lançon & Wood (2000), the post-AGB library from Rauch (2003), and the WMBASIC hot star library from Eldridge et al. (2017).”