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The galactic population of globular clusters are old, dense star systems, with a typical cluster containing $10^4 - 10^6$ stars. As an old population of stars, globular clusters contain many collapsed and degenerate objects. As a dense…

Astrophysics · Physics 2016-10-19 Matthew Benacquista

Numerical simulations have now shown that Population III (Pop III) stars can form in binaries and small clusters and that these stars can be in close proximity to each other. If so, they could be subject to binary interactions such as mass…

Solar and Stellar Astrophysics · Physics 2023-07-12 Sung-Han Tsai , Ke-Jung Chen , Daniel Whalen , Po-Sheng Ou , Tyrone E. Woods

This paper presents theoretical integrated spectral energy distributions (SEDs) of binary star composite stellar populations (bsCSPs) in early-type galaxies, and how the bsCSP model can be used for spectral studies of galaxies. All bsCSPs…

Astrophysics of Galaxies · Physics 2015-06-05 Zhongmu Li , Liyun Zhang , Jinzhong Liu

The current state-of-the-art of population synthesis is reviewed. The field is currently undergoing major revisions with the recognition of several key processes as new critical ingredients. Stochastic effects can artificially enhance or…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 Claus Leitherer , Sylvia Ekstrom

The fraction of stars in binary systems within star clusters is important for their evolution, but what proportion of binaries form by dynamical processes after initial stellar accretion remains unknown. In previous work, we showed that…

The formation and evolution of binaries which contain two neutron stars or a neutron star with a black hole are discussed in detail. The evolution of the distributions in orbital period and eccentricity for neutron star binaries are studied…

Astrophysics · Physics 2016-08-30 Simon F. Portegies Zwart , Lev R. Yungelson

A stellar population synthesis model, suitable for comparison with Giant Extragalactic HII Regions (GEHRs), is constructed incorporating the recent developments in modelling stellar evolution by Maeder and co-workers and stellar atmospheres…

Astrophysics · Physics 2016-08-30 Y. D. Mayya

We investigate the uncertainties in the synthetic integrated colors of simple stellar populations. Three types of uncertainties are from the stellar models, the population synthesis techniques, and from the spectral libraries. Despite some…

Astrophysics · Physics 2011-07-18 Sukyoung K. Yi

We present an ongoing study on tidal interactions in late-type close binary stars. New results on tidal circularization are combined with existing data to test and constrain theoretical predictions of tidal circularization in the…

Astrophysics · Physics 2007-05-23 S. Meibom , R. D. Mathieu

The basic assumptions behind Population Synthesis and Spectral Evolution models are reviewed. The numerical problems encountered by the standard population synthesis technique when applied to models with truncated star formation rates are…

Astrophysics · Physics 2007-05-23 Gustavo Bruzual A

Using the StarTrack binary population synthesis code we investigate the properties of population of compact object binaries. Taking into account the selection effects we calculate the expected properties of the observed binaries.We analyze…

Astrophysics · Physics 2009-11-10 T. Bulik , K. Belczynski

Evolutionary synthesis models for star clusters of various metallicities including gaseous emission during the lifetime of the ionising stars are used to model star cluster systems comprising two populations: an old metal-poor globular…

Astrophysics · Physics 2007-05-23 Uta Fritze -- v. Alvensleben , Peter Anders , Richard de Grijs

Binaries that contain a hot subdwarf (sdB) star and a main sequence companion may have interacted in the past. This binary population has historically helped determine our understanding of binary stellar evolution. We have computed a grid…

Solar and Stellar Astrophysics · Physics 2015-06-03 Drew Clausen , Richard A Wade , Ravi kumar Kopparapu , Richard O'Shaughnessy

We present a novel statistical algorithm, Stellar Ages, which currently infers the age, metallicity, and extinction posterior distributions of stellar populations from their magnitudes. While this paper focuses on these parameters, the…

Solar and Stellar Astrophysics · Physics 2025-12-18 Joseph J. Guzman , Jeremiah W. Murphy , Andres F. Barrientos , Benjamin F. Williams , Julianne J. Dalcanton

We present a detailed spatial analysis of stellar populations based on long-slit optical spectra in a sample of eight luminous early-type galaxies selected from nearby sparse groups and pairs, three of them may be interacting with a galaxy…

Astrophysics of Galaxies · Physics 2018-06-11 D. A. Rosa , A. C. Milone , A. C. Krabbe , I. Rodrigues

Among massive stars, binary interaction is the rule rather than the exception. The closest binaries, those with periods of less than about 10 days, undergo mass transfer during core-hydrogen burning, with many of them experiencing a…

Solar and Stellar Astrophysics · Physics 2025-03-17 Matthias Fabry , Pablo Marchant , Norbert Langer , Hugues Sana

In this paper, we systematically studied blue stragglers produced from primordial binary evolution via a binary population synthesis approach, and examined their contribution to the integrated spectral energy distributions of the host…

Solar and Stellar Astrophysics · Physics 2009-11-13 Xuefei Chen , Zhanwen Han

We present a suite of binary evolution models with massive primaries (10 $\leq$ M$_1$ $\leq$ 40 M$_\odot$) and periods and mass ratios chosen such that the systems undergo non-conservative mass transfer while the primaries have helium…

Solar and Stellar Astrophysics · Physics 2024-05-10 Michelle Nguyen , Alison Sills

We present unified chemical and spectrophotometric evolutionary synthesis models that allow to describe composite stellar populations in a chemically consistent way. Keeping track of the ISM abundance at birth of each star and using sets of…

Astrophysics · Physics 2020-05-27 U. Fritze-v. Alvensleben

Mass changes due to strong stellar winds and binary mass transfer have a dramatic impact on the consequent evolution of stars. This is generally not accounted for in population synthesis codes which are built using single star evolution…

Solar and Stellar Astrophysics · Physics 2025-03-25 Natalie R. Rees , Robert G. Izzard , David D. Hendriks
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