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Hubble Space Telescope (HST) imaging of four rich, X-ray luminous, galaxy clusters (0.33<z<0.83) is used to produce quantitative morphological measurements for galaxies in their fields. Catalogs of these measurements are presented for 1642…

天体物理学 · 物理学 2009-11-10 Amelie Saintonge , David Schade , Erica Ellingson , Howard K. C. Yee , Raymond G. Carlberg

We present a new stellar evolution code and a set of results, demonstrating its capability at calculating full evolutionary tracks for a wide range of masses and metallicities. The code is fast and efficient, and is capable of following…

天体物理学 · 物理学 2009-11-13 Attay Kovetz , Ofer Yaron , Dina Prialnik

This is the first of a series of papers presenting the THROES (A caTalogue of HeRschel Observations of Evolved Stars) project, intended to provide a comprehensive overview of the spectroscopic results obtained in the far-infrared (55-670…

太阳与恒星天体物理 · 物理学 2018-04-04 J. Ramos-Medina , C. Sánchez Contreras , P. García-Lario , C. Rodrigo , J. da Silva Santos , E. Solano

Open clusters have long been used to gain insights into the structure, composition, and evolution of the Galaxy. With the large amount of stellar data available for many clusters in the Gaia era, new techniques must be developed for…

太阳与恒星天体物理 · 物理学 2018-07-25 Steffi X. Yen , Sabine Reffert , Elena Schilbach , Siegfried Röser , Nina V. Kharchenko , Anatoly E. Piskunov

The HST/ACS Survey of Galactic globular clusters (GGCs) is a HST Treasury project aimed at obtaining high precision photometry in a large sample of globular clusters. The homogeneous photometric catalogs that has been obtained from these…

天体物理学 · 物理学 2008-01-22 A. P. Milone , G. Piotto , L. R. Bedin , A. Sarajedini

Asteroseismology provides a new avenue for accurately measuring the masses of evolved globular cluster (GC) stars through the detection of their solar-like oscillations. We present the first detections of solar-like oscillations in 47 red…

太阳与恒星天体物理 · 物理学 2023-07-17 Madeline Howell , Simon W. Campbell , Dennis Stello , Gayandhi M. De Silva

We used a proper combination of high-resolution HST observations and wide-field ground based data to derive the radial star density profile of 26 Galactic globular clusters from resolved star counts (which can be all freely downloaded…

星系天体物理 · 物理学 2013-08-28 P. Miocchi , B. Lanzoni , F. R. Ferraro , E. Dalessandro , E. Vesperini , M. Pasquato , G. Beccari , C. Pallanca , N. Sanna

A fundamental feature of galaxies is their structure, yet we are just now understanding the evolution of structural properties in quantitative ways. As such, we explore the quantitative non-parametric structural evolution of 16,778 galaxies…

星系天体物理 · 物理学 2021-10-13 A. Whitney , L. Ferreira , C. J. Conselice , K. Duncan

This is the first of a series of papers that will introduce a user-friendly, detailed, and modular GALactic Chemical Evolution Model, GalCEM, that tracks isotope masses as a function of time in a given galaxy. The list of tracked isotopes…

Using a new grid of models of cooling white dwarfs, we calculate isochrones and luminosity functions in the Johnson-Kron/Cousins and HST filter sets for systems containing old white dwarfs. These new models incorporate a non-grey atmosphere…

We update and expand the MESA Isochrones and Stellar Tracks (MIST) database to include variations in the alpha-capture elements, specifically [alpha/Fe]=-0.2, 0, +0.2, +0.4, and +0.6 for -3 <= [Fe/H] <= +0.5. Variations in [alpha/Fe] are…

太阳与恒星天体物理 · 物理学 2026-02-26 A Dotter , E Bauer , MJ Park , C Conroy , A Milone , M Joyce , M Cantiello

We present the first detailed analysis of the mass and dynamical structure of a sample of six early-type lens galaxies, selected from the Sloan Lens ACS Survey, in the redshift range 0.08 < z < 0.33. Both Hubble Space Telescope (HST)/ACS…

宇宙学与河外天体物理 · 物理学 2011-04-11 Matteo Barnabe , Oliver Czoske , Leon Koopmans , Tommaso Treu , Adam Bolton , Raphael Gavazzi

We first presented an isochrone database that can be widely used for stellar population synthesis studies and colour-magnitude diagram (CMD) fitting. The database consists of the isochrones of both single star and binary star simple stellar…

天体物理学 · 物理学 2009-11-13 Zhongmu Li , Zhanwen Han

Current catalogues of open clusters are rather heterogeneous and incomplete lists of clusters than true catalogues. Before there has been no attempts of automatic search for open clusters in huge photometric catalogues using homogeneous…

天体物理学 · 物理学 2007-05-23 Ivan Zolotukhin , Sergey Koposov , Elena Glushkova

Over the last few decades, exhaustive surveys of extra Galactic globular clusters (EGGCs) have become feasible. Only recently, kinematical information of globular clusters (GCs) were available through Gaia DR2 spectroscopy and also proper…

星系天体物理 · 物理学 2021-01-13 Agostino Leveque , Mirosław Giersz , Maurizio Paolillo

We present the Dartmouth Stellar Evolution Emulator (DSEE), a flow-based stellar evolution model emulator trained on a comprehensive database comprising over eight million evolutionary tracks that vary across twenty input-physics dimensions…

太阳与恒星天体物理 · 物理学 2026-04-09 Jiaqi , Ying , Brian Chaboyer , Phillip A. Cargile , Wenxin Du , George Dufresne

We present new measurements of the centers for 65 Milky Way globular clusters. Centers were determined by fitting ellipses to the density distribution within the inner $2\arcmin$ of the cluster center, and averaging the centers of these…

星系天体物理 · 物理学 2015-05-19 Ryan Goldsbury , Harvey B. Richer , Jay Anderson , Aaron Dotter , Ata Sarajedini , Kristin Woodley

We introduce version two of the fast star cluster evolution code Evolve Me A Cluster of StarS (EMACSS). The first version (Alexander & Gieles) assumed that cluster evolution is balanced for the majority of the life-cycle, meaning that the…

星系天体物理 · 物理学 2015-06-17 Mark Gieles , Poul Alexander , Henny Lamers , Holger Baumgardt

We present the first dynamical study of the optically selected Palomar Distant Cluster Survey (PDCS). We show that eleven out of twelve PDCS clusters we observed are real over-densities of galaxies. Most clusters have velocity dispersions…

天体物理学 · 物理学 2009-10-31 B. P. Holden , C. Adami , R. C. Nichol , F. J. Castander , L. M. Lubin , A. K. Romer , A. Mazure , M. Postman , M. P. Ulmer