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The evolution of the universe together with the galaxies is one of the fundamental issues that we humans are most interested in. Both the observations of tidal streams from SDSS and the theory of $\Lambda$CDM support the hierarchical…

Astrophysics of Galaxies · Physics 2025-04-16 Yanhui Chen

We present a new generation of chemically consistent evolutionary synthesis models for galaxies of various spectral types from E through Sd. The models follow the chemical enrichment of the ISM and take into account the increasing initial…

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

The planetary population synthesis method aims at comprehensively testing planet formation theories against observational evidence and providing theoretical sets of planets to help interpret observations and inform instrument development.…

Earth and Planetary Astrophysics · Physics 2024-10-02 Remo Burn , Christoph Mordasini

We perform binary population synthesis calculations to investigate the incidence of low-mass X-ray binaries and their birth rate in the Galaxy. We use a binary evolution algorithm that models all the relevant processes including tidal…

Astrophysics · Physics 2009-11-11 Paul D. Kiel , Jarrod R. Hurley

We apply Monte Carlo Markov Chain (MCMC) methods to large-scale simulations of galaxy formation in a LambdaCDM cosmology in order to explore how star formation and feedback are constrained by the observed luminosity and stellar mass…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Bruno Henriques , Simon White , Peter Thomas , Raul Angulo , Qi Guo , Gerard Lemson , Volker Springel

The determination of stellar populations of galaxies are important for studying the formation and evolution of galaxies, because all galaxies contain many stars and they evolve with galaxies. Spectra data are usually used to determine the…

Solar and Stellar Astrophysics · Physics 2013-02-04 Zhongmu Li

We present a detailed analysis of our ability to determine stellar masses, ages, reddening and extinction values, and star formation rates of high-redshift galaxies by modeling broad-band SEDs with stellar population synthesis. In order to…

Cosmology and Nongalactic Astrophysics · Physics 2011-02-11 Stijn Wuyts , Marijn Franx , Thomas J. Cox , Lars Hernquist , Philip F. Hopkins , Brant E. Robertson , Pieter G. van Dokkum

As the reconstruction of the star-formation histories (SFH) of galaxies from spectroscopic data becomes increasingly popular, we explore the best age resolution achievable with stellar population synthesis (SPS) models, relying on different…

Astrophysics of Galaxies · Physics 2024-01-19 Stefano Zibetti , Edoardo Rossi , Anna R. Gallazzi

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

We briefly review some constraints (Owing to the limited number of pages of present review, only a sub-sample of the topics discussed during the talk are briefly summarized. For the interested readers we are pleased to send them upon…

Astrophysics · Physics 2009-11-13 S. Cassisi

Stellar population studies of early-type galaxies (ETGs) based on their optical stellar continuum suggest that these are quiescent systems. However, emission lines and ultraviolet photometry reveal a diverse population. We use a new version…

Evolutionary synthesis models for stellar populations of various ages and chemical compositions are constructed with the approach described in Maraston (1998), in which the Fuel Consumption Theorem is used to evaluate the energetics of Post…

Astrophysics · Physics 2007-05-23 Claudia Maraston

The majority of pulsar population synthesis studies performed to date have focused on isolated pulsar evolution. Those that have incorporated pulsar evolution within binary systems have tended to either treat binary evolution poorly of…

Astrophysics · Physics 2009-06-23 Paul Kiel , Jarrod Hurley , Matthew Bailes , James Murray

Using the StarTrack binary population synthesis code we model the population of double neutron stars in the Galaxy. We include a detailed treatment of the spin evolution of each pulsar due to processes such as spin-down and spin-up during…

Astrophysics of Galaxies · Physics 2011-02-15 S. Oslowski , T. Bulik , D. Gondek-Rosinska , K. Belczynski

The evolution of AGB stars is notoriously complex. The confrontation of AGB population models with observed stellar populations is a useful alternative to the detailed study of individual stars in efforts to converge towards a reliable…

Astrophysics of Galaxies · Physics 2010-11-23 Ariane Lançon

Colors are usually not used for constraining stellar populations because they are thought to have the well-known agemetallicity degeneracy, but some recent works show that colors can also be used. A simple stellar population synthesis model…

Astrophysics · Physics 2009-11-11 Zhongmu Li , Zhanwen Han , Fenghui Zhang

Understanding galaxy morphology evolution across cosmic time requires models that can generate realistic galaxy populations conditioned on redshift. In this work, we study efficient redshift-conditioned generative modeling for astrophysical…

Instrumentation and Methods for Astrophysics · Physics 2026-05-19 Tianyue Yang , Sandro Tacchella , Xiao Xue

[abridged] The galactic field's late-type stellar single and binary population is calculated on the supposition that all stars form as binaries in embedded star clusters. A recently developed tool (Marks, Kroupa & Oh) is used to evolve the…

Astrophysics of Galaxies · Physics 2015-05-30 Michael Marks , Pavel Kroupa

We present the first asymmetric drift (AD) measurements for unresolved stellar populations of different characteristic ages above and below 1.5 Gyr. These measurements sample the age-velocity relation (AVR) in galaxy disks. In this first…