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(Abridged) This paper presents integrated magnitude and colours for synthetic clusters. The integrated parameters have been obtained for the whole cluster population as well as for the main-sequence (MS) population of star clusters. We have…

Astrophysics of Galaxies · Physics 2015-05-18 A. K. Pandey , T. S. Sandhu , R. Sagar , P. Battinelli

We extend the spectral range of our stellar population synthesis models based on the MILES and CaT empirical stellar spectral libraries. For this purpose we combine these two libraries with the Indo-U.S. to construct composite stellar…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-05 A. Vazdekis , E. Ricciardelli , A. J. Cenarro , J. G. Rivero-González , L. A. Díaz-García , J. Falcón-Barroso

We investigate the influence of Asymptotic Giant Branch stars on integrated colours of star clusters of ages between ~100 Myr and a few gigayears, and composition typical for the Magellanic Clouds. We use state-of-the-art stellar evolution…

Solar and Stellar Astrophysics · Physics 2015-06-19 M. Salaris , A. Weiss , L. Cassara' , L. Piovan , C. Chiosi

Subdwarf B stars (sdBs) can significantly change the ultraviolet spectra of populations at age t~1Gyr, and have been even included in the volutionary population synthesis (EPS) models by Han et al. (2007). In this study we present the…

Solar and Stellar Astrophysics · Physics 2010-06-24 F. Zhang , Z. Han , L. Li , Y. Zhang , J. Guo

Double or extended main-sequence turn-offs (DMSTOs) and dual red clump (RC) were observed in intermediate-age clusters, such as in NGC 1846 and 419. the DMSTOs are interpreted as that the cluster has two distinct stellar popula- tions with…

Solar and Stellar Astrophysics · Physics 2015-05-27 Wuming Yang , Xiangcun Meng , Shaolan Bi , Zhijia Tian , Tanda Li , Kang Liu

Using our Binary Population And Spectral Synthesis (BPASS) code we explore the effects on star-formation rate indicators of stochastically sampling the stellar initial mass function, adding a cluster mass dependent stellar upper-mass limit…

Solar and Stellar Astrophysics · Physics 2015-05-28 John J. Eldridge

We present numerical models of the nebular emission from H II regions around young stellar populations over a range of compositions and ages. The synthetic stellar pop- ulations include both single stars and interacting binary stars. We…

Astrophysics of Galaxies · Physics 2018-03-28 Lin Xiao , Elizabeth Stanway , J. J. Eldridge

About seventy percent of intermediate-age star clusters in the Large Magellanic Clouds have been confirmed to have broad main sequence, multiple or extended turn-offs and dual red giant clumps. The observed result seems against the…

Solar and Stellar Astrophysics · Physics 2015-06-12 Zhongmu Li , Caiyan Mao , Li Chen , Qian Zhang

I present integrated colors and surface brightness fluctuation magnitudes in the mid-IR, derived from stellar population synthesis models that include the effects of the dusty envelopes around thermally pulsing asymptotic giant branch…

Astrophysics of Galaxies · Physics 2018-04-25 Rosa A. González-Lópezlira

Compact binary mergers forming in star clusters may exhibit distinctive features that can be used to identify them among observed gravitational-wave (GW) sources. Such features likely depend on the host cluster structure and the physics of…

High Energy Astrophysical Phenomena · Physics 2023-07-12 Manuel Arca Sedda , Albrecht W. H. Kamlah , Rainer Spurzem , Francesco Paolo Rizzuto , Mirek Giersz , Thorsten Naab , Peter Berczik

In this chapter we discuss the population and spectral synthesis of stellar populations. We describe the method required to achieve such synthesis and discuss examples where inclusion of interacting binaries are vital to reproducing the…

Solar and Stellar Astrophysics · Physics 2020-06-15 J. J. Eldridge , Elizabeth R. Stanway

A large number of mergers of binary black holes (BHs) have been discovered by gravitational wave observations since the first detection of gravitational waves 2015. Binary BH mergers are the loudest events in the universe, however their…

High Energy Astrophysical Phenomena · Physics 2024-03-18 Ataru Tanikawa

Stellar population synthesis (SPS) provides the link between the stellar and dust content of galaxies and their observed spectral energy distributions. In the present work we perform a comprehensive calibration of our own flexible SPS…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Charlie Conroy , James E. Gunn

We investigate the formation of merging binary black holes (BHs) through isolated binary evolution, performing binary population synthesis calculations covering an unprecedentedly wide metallicity range of Population (Pop) I, II, III, and…

High Energy Astrophysical Phenomena · Physics 2022-03-03 Ataru Tanikawa , Takashi Yoshida , Tomoya Kinugawa , Alessandro A. Trani , Takashi Hosokawa , Hajime Susa , Kazuyuki Omukai

We present the results of the stellar feedback from Pop III binaries by employing improved, more realistic Pop III evolutionary stellar models. To facilitate a meaningful comparison, we consider a fixed mass of 60 solar masses (Msun)…

Astrophysics of Galaxies · Physics 2015-06-22 Ke-Jung Chen , Volker Bromm , Alexander Heger , Myoungwon Jeon , Stan Woosley

Theoretical integrated broad-band colors ranging from far-UV to near-IR have been computed for old stellar systems from our evolutionary population synthesis code. These models take into account, for the first time, the detailed systematic…

Astrophysics · Physics 2009-11-07 Hyun-chul Lee , Young-Wook Lee , Brad K. Gibson

We present new, high-to-intermediate spectral resolution stellar population models, based on four popular libraries of empirical stellar spectra, namely Pickles, ELODIE, STELIB and MILES. These new models are the same as our previous…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-30 Claudia Maraston , Gustav Stromback , ICG-University of Portsmouth , United Kingdom

We use the Binary Population and Spectral Synthesis (BPASS) models to test the recent suggestion that red supergiants can provide an accurate age estimate of a co-eval stellar population that is unaffected by interacting binary stars. Ages…

Solar and Stellar Astrophysics · Physics 2020-04-29 J. J. Eldridge , Emma R. Beasor , N. Britavskiy

We present a new framework to incorporate feedback from massive interacting binaries in simulations of star cluster formation. Our new feedback model adds binary stellar evolution to the cluster formation code Torch, and couples it in AMUSE…

We study the evolution of populations of binary stars within massive cluster-forming regions. We simulate the formation of young massive star clusters within giant molecular clouds with masses ranging from 2 x 10$^{4}$ to 3.2 x 10$^{5}$…