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The enhancement of $\alpha$ elements such as oxygen is an important phase in the chemical evolution of the early Universe, with nebular material becoming enriched in these elements sooner than iron. Here we present models which incorporate…

Solar and Stellar Astrophysics · Physics 2022-04-08 C. M. Byrne , E. R. Stanway , J. J. Eldridge , L. McSwiney , O. T. Townsend

We present TARDIS - an open-source code for rapid spectral modelling of supernovae (SNe). Our goal is to develop a tool that is sufficiently fast to allow exploration of the complex parameter spaces of models for SN ejecta. This can be used…

Solar and Stellar Astrophysics · Physics 2015-06-18 Wolfgang E. Kerzendorf , Stuart A. Sim

We have developed a method for fast and accurate stellar population parameters determination in order to apply it to high resolution galaxy spectra. The method is based on an optimization technique that combines active learning with an…

Astrophysics · Physics 2010-11-11 Thamar Solorio , Olac Fuentes , Roberto Terlevich , Elena Terlevich

We present and discuss evolutionary synthesis models for massive stellar populations generated with the Starburst99 code in combination with a new set of stellar evolution models accounting for rotation. The new stellar evolution models…

In three previous papers (Pelat 1997, 1998 and Moultaka & Pelat 2000), we set out an inverse stellar population synthesis method which uses a database of stellar spectra. Unlike other methods, this one provides a full knowledge of all…

Astrophysics · Physics 2009-11-10 J. Moultaka , C. Boisson , M. Joly , D. Pelat

There are important but unresolved processes in the standard formation scenarios of double compact star binaries (DCBs; BH-BH, BH-NS, NS-NS systems), such as mass transfer and the common envelope (CE) phase. We analyze the effects of…

High Energy Astrophysical Phenomena · Physics 2018-10-29 Iminhaji Ablimit , Keiichi Maeda

The physical properties of galaxies are encoded within their spectral energy distribution and require comparison with models to be extracted. These models must contain a synthetic stellar population and, where infrared data is to be used,…

Astrophysics of Galaxies · Physics 2022-06-22 G. T. Jones , E. R. Stanway , A. C. Carnall

Binary stars undergo a variety of interactions and evolutionary phases, critical for predicting and explaining observed properties. Binary population synthesis with full stellar-structure and evolution simulations are computationally…

In the last two decades about a dozen methods were invented which derive, from a series of composite spectra over the orbit, the spectra of individual components in binary and multiple systems. Reconstructed spectra can then be analyzed…

Solar and Stellar Astrophysics · Physics 2009-09-18 K. Pavlovski , H. Hensberge

A crucial ingredient in population synthesis studies involving massive stars is the determination of whether they explode or implode in the end. While the final fate of a massive star is sensitive to its core structure at the onset of…

Solar and Stellar Astrophysics · Physics 2020-10-07 Rachel A. Patton , Tuguldur Sukhbold

Context: Field stars are not always single stars, but can often be found in bound double systems. Since binary frequencies in the birth places of stars, young embedded clusters, are sometimes even higher than on average the question arises…

Astrophysics of Galaxies · Physics 2015-05-27 Thomas Kaczmarek , Christoph Olczak , Susanne Pfalzner

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

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

We use the StarTrack stellar population synthesis code to analyze properties of double compact object binaries as sources of gravitational waves. Since the distribution of lifetimes of these objects extends up to the Hubble time we conclude…

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

We compare six popularly used evolutionary population synthesis (EPS) models (BC03, CB07, Ma05, GALEV, GRASIL, Vazdekis/Miles) through fitting the full optical spectra of six representative types of galaxies (star-forming and composite…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 X. Y. Chen , Y. C. Liang , F. Hammer , Ph. Prugniel , G. H. Zhong , M. Rodrigues , Y. H. Zhao , H. Flores

The evolution of binary stellar systems involves a wide range of physical processes, many of which are not yet well understood. We aim to build a general-purpose algorithm based on inverse population synthesis techniques, able to…

Solar and Stellar Astrophysics · Physics 2025-06-11 Santiago Torres , Marta Gili , Alberto Rebassa-Mansergas , Alejandro Santos-García , Alex J. Brown , Steven G. Parsons

We present an evolutionary stellar population synthesis model which predicts SED's for simple stellar populations, SSP's, at ~2A resolution in the visible. The input database is composed of ~550 stars, selected from the spectral library of…

Astrophysics · Physics 2009-10-31 Alexandre Vazdekis

We briefly describe different astrophysical applications of a population synthesis method. In some details we discuss the population synthesis of close binary systems and of isolated neutron stars.

Astrophysics · Physics 2008-11-26 S. B. Popov , M. E. Prokhorov

We apply population synthesis techniques to calculate the present day population of post-common envelope binaries (PCEBs) for a range of theoretical models describing the common envelope (CE) phase. Adopting the canonical energy budget…

Solar and Stellar Astrophysics · Physics 2015-05-13 P. J. Davis , U. Kolb , B. Willems

(Aims) We present a number of improvements to the MILES library and stellar population models. We correct some small errors in the radial velocities of the stars, measure the spectral resolution of the library and models more accurately,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 J. Falcón-Barroso , P. Sánchez-Blázquez , A. Vazdekis , E. Ricciardelli , N. Cardiel , A. J. Cenarro , J. Gorgas , R. F. Peletier
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