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We present cogsworth, an open-source Python tool for producing self-consistent population synthesis and galactic dynamics simulations. With cogsworth one can (1) sample a population of binaries and star formation history, (2) perform rapid…

星系天体物理 · 物理学 2024-11-07 Tom Wagg , Katelyn Breivik , Mathieu Renzo , Adrian M. Price-Whelan

We present a computational framework for "painting" galaxies on top of the Dark Matter Halo/Sub-Halo hierarchy obtained from N-body simulations. The method we use is based on the sub-halo clustering and abundance matching (SCAM) scheme…

宇宙学与河外天体物理 · 物理学 2024-02-15 Tommaso Ronconi , Andrea Lapi , Matteo Viel , Alberto Sartori

We present integrated photometry and color-magnitude diagrams (CMDs) for 24 star clusters in M33, of which 12 were previously uncataloged. These results are based on Advanced Camera for Surveys observations from the Hubble Space Telescope…

天体物理学 · 物理学 2008-11-26 Ata Sarajedini , M. K. Barker , Doug Geisler , Paul Harding , Robert Schommer

We present a comprehensive study of the applications of the pixel color-magnitude diagram (pCMD) technique for measuring star formation histories (SFHs) and other stellar population parameters of galaxies, and demonstrate that the technique…

星系天体物理 · 物理学 2019-05-15 B. A. Cook , Charlie Conroy , Pieter van Dokkum , Joshua S. Speagle

Determining the properties of old stellar populations (those with age >1 Gyr) has long involved the comparison of their integrated light, either in the form of photometry or spectroscopic indexes, with empirical or synthetic templates. Here…

星系天体物理 · 物理学 2018-06-06 E R Stanway , J J Eldridge

We present MASSCLEAN, a new, sophisticated and robust stellar cluster image and photometry simulation package. This visualization tool is able to create color-magnitude diagrams and standard FITS images in any of the traditional optical and…

天体物理学 · 物理学 2015-05-13 Bogdan Popescu , M. M. Hanson

We present a large and updated stellar evolution database for low-, intermediate- and high-mass stars in a wide metallicity range, suitable for studying Galactic and extragalactic simple and composite stellar populations using population…

天体物理学 · 物理学 2009-11-10 A. Pietrinferni , S. Cassisi , M. Salaris , F. Castelli

Cosmological LambdaCDM TreeSPH simulations of the formation and evolution of galaxy groups and clusters have been performed. The simulations include: star formation, chemical evolution with non-instantaneous recycling, metal dependent…

天体物理学 · 物理学 2007-05-23 Alessio D. Romeo , J. Sommer-Larsen , L. Portinari

We aim to test the power of theoretical calibrations based on a new generation of MARCS models by comparisons with observational photomteric data. We calculate synthetic uvby-Hbeta colour indices from synthetic spectra. A sample of 388…

天体物理学 · 物理学 2009-11-13 A. Önehag , B. Gustafsson , K. Eriksson , B. Edvardsson

Magpy is a C++ accelerated Python package for modelling and simulating the magnetic dynamics of nano-sized particles. Nanoparticles are modelled as a system of three-dimensional macrospins and simulated with a set of coupled stochastic…

计算物理 · 物理学 2018-01-25 Oliver Laslett , Jonathon Waters , Hans Fangohr , Ondrej Hovorka

The upcoming facilities like the Vera C. Rubin Observatory will provide extremely deep photometry of thousands of star clusters to the edge of the Galaxy and beyond, which will require adequate tools for automatic analysis, capable of…

天体物理仪器与方法 · 物理学 2023-06-28 Jose Schiappacasse-Ulloa , Mario Pasquato , Sara Lucatello

To advance our understanding of the evolution of the interstellar medium (ISM) of our Galaxy, numerical models of Milky Way (MW) type galaxies are widely used. However, most models only vaguely resemble the MW (e.g. in total mass), and…

We present the analysis of a deep colour-magnitude diagram (CMD) of NGC 1831, a rich star cluster in the LMC. The data were obtained with HST/WFPC2 in the F555W (~V) and F814W (~I) filters, reaching m_555 ~ 25. We discuss and apply a method…

天体物理学 · 物理学 2009-11-07 L. O. Kerber , B. X. Santiago , R. Castro , D. Valls-Gabaud

This paper develops a method for obtaining the star formation histories of a mixed, resolved population through the use of color-magnitude diagrams (CMDs). The method provides insight into the local star formation rate, analyzing the…

天体物理学 · 物理学 2009-11-11 M. Cignoni , S. Degl'Innocenti , P. G. Prada Moroni , S. N. Shore

I present StarEstate, an open-source Python package for producing rapid, statistically robust galactic population synthesis models. By utilizing optimized pre-calculated inverse-cumulative distribution function samplers, the tool generates…

天体物理仪器与方法 · 物理学 2025-11-27 Amedeo Romagnolo

We introduce a procedure developed by the ``Teramo Stellar Populations Tools'' group (Teramo-SPoT), specifically optimized to obtain realistic simulations of CCD images of elliptical galaxies. Particular attention is devoted to include the…

天体物理学 · 物理学 2007-05-23 M. Cantiello , G. Raimondo , E. Brocato , J. P. Blakeslee , M. Capaccioli

The integrated spectra of stellar systems contain a wealth of information, and its analysis can reveal fundamental parameters such as metallicity, age and star formation history. Widely used methods to analyze these spectra are based on…

太阳与恒星天体物理 · 物理学 2019-02-04 Lucimara P. Martins , Círia Lima-Dias , Paula R. T. Coelho , Tatiana F. Laganá

In this review we address the uncertainties implicit in evolutionary synthesis model computations. After describing the general structure of synthesis codes, we discuss several source of uncertainties that may affect their results. In…

天体物理学 · 物理学 2007-05-23 M. Cervino , V. Luridiana

We perform an extensive test of theoretical stellar models for main-sequence stars in ugriz, using cluster fiducial sequences obtained in the previous paper of this series. We generate a set of isochrones using the Yale Rotating…

The color-magnitude diagram (CMD) of globular cluster NGC1651 has special structures including a broad main sequence, an extended main sequence turn-off and an extended red giant clump. The reason for such special CMDs remains unclear. In…

太阳与恒星天体物理 · 物理学 2015-06-24 Zhongmu Li , Caiyan Mao , Li Chen