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Star formation plays a central role in the evolution of galaxies and of the Universe as a whole. Studies of star-forming regions in the local universe have shown that star formation typically occurs in a clustered fashion. Building a…

I will review the progress of VLT spectroscopy of large numbers of individual stars in nearby dwarf spheroidal galaxies. This spectroscopy has allowed us to obtain detailed insights into the chemical and dynamical properties of the resolved…

Astrophysics · Physics 2009-11-11 Eline Tolstoy

The characteristics and properties of the stellar populations and evolutionary histories of Local Group galaxies are summarized and compared to predictions of cosmological models. No clear signature of the re-ionization epoch is observed;…

Astrophysics · Physics 2009-11-13 Eva K. Grebel

Positional, structural and dynamical parameters for all dwarf galaxies in and around the Local Group are presented, and various aspects of our observational understanding of this volume-limited sample are discussed. Over 100 nearby galaxies…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 Alan W. McConnachie

We explore the motivation behind large stellar surveys in Galactic astronomy, in particular, surveys that measure the photometric, phase space and abundance properties of thousands or millions of stars. These observations are essential to…

Astrophysics · Physics 2007-05-23 Joss Bland-Hawthorn , Ken Freeman

An increasing number of both photometric and spectroscopic observations over the last years have shown the existence of distinct sub-populations in many Galactic globular clusters and shattered the paradigm of globulars hosting single,…

Solar and Stellar Astrophysics · Physics 2015-03-17 Antonino P. Milone , Giampaolo Piotto , Luigi R. Bedin , Andrea Bellini , Anna F. Marino , Yazan Momany

The last decade has seen enormous progress in understanding the structure of the Milky Way and neighboring galaxies via the production of large-scale digital surveys of the sky like 2MASS and SDSS, as well as specialized, counterpart…

Astrophysics of Galaxies · Physics 2015-05-18 Steven R. Majewski

This conference demonstrated the tremendous progress that has been made in the last decade in our observational and theoretical understanding of compact, young, massive star clusters. One of the Hubble Space Telescope's main achievements…

Astrophysics · Physics 2007-05-23 Robert W. O'Connell

Observations of star-forming galaxies in the distant Universe have confirmed the importance of massive stars in shaping galaxy emission and evolution. Distant stellar populations are unresolved, and the limited data available must be…

Astrophysics of Galaxies · Physics 2020-06-10 E R Stanway , J J Eldridge

I present a brief review of the stellar population properties of massive galaxies, focusing on early-type galaxies in particular, with emphasis on recent results from the ATLAS3D Survey. I discuss the occurrence of young stellar ages, cold…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Richard M. McDermid

Dwarf galaxies provide opportunities for drawing inferences about the processes in the early universe by observing our "cosmological backyard"-the Local Group and its vicinity. This special issue of the open-access journal Advances in…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Regina Schulte-Ladbeck , Ulrich Hopp , Elias Brinks , Andrey Kravtsov

I summarize in terms of evolutionary population synthesis models our current understanding of stellar populations in different environments, from star clusters in nearby galaxies to distant galaxies in clusters or seen through gravitational…

Astrophysics · Physics 2007-05-23 Gustavo Bruzual A

The star formation histories of Local Group galaxies are summarized. The three large spirals are discussed individually, whereas the discussion of the Local Group dwarfs concentrates on differences and commonalities. While Local Group…

Astrophysics · Physics 2007-05-23 Eva K Grebel

My presentation was an overview of what we know about the Local Group of galaxies, primarily from optical imaging and spectroscopy. AGB stars are on the whole a very sparse and unrepresentative stellar population in most Local Group…

Astrophysics of Galaxies · Physics 2010-12-13 Eline Tolstoy

Understanding the evolution of galaxies provides crucial insights into a broad range of aspects in astrophysics, including structure formation and growth, the nature of dark energy and dark matter, baryonic physics, and more. It is,…

Astrophysics of Galaxies · Physics 2023-09-13 Andreas Filipp , Yiping Shu , Ruediger Pakmor , Sherry H. Suyu , Xiaosheng Huang

I set the stage for discussion of the stellar populations in interacting galaxies by looking back over the slow development of our understanding of these systems. From early anecdotal collections, to systematic cataloging, and finally to…

Cosmology and Nongalactic Astrophysics · Physics 2009-08-13 William C. Keel

We study galaxy evolution and spatial patterns in the surroundings of a sample of 2dF groups. Our aim is to find evidence of galaxy evolution and clustering out to 10 times the virial radius of the groups and so redefine their properties…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-13 A. L. B. Ribeiro , M. Trevisan , P. A. A. Lopes , A. C. Schilling

The star formation, mass assembly and chemical enrichment histories of galaxies, and their present distributions of dark matter, remain encoded in their stellar populations. Distinguishing the actual distribution functions of stellar age,…

Astrophysics · Physics 2009-11-11 Rosemary F. G. Wyse , Gerard Gilmore

Top of the wish list of any astronomer who wants to understand galaxy formation and evolution is to resolve the stellar populations of a sample of giant elliptical galaxies: to take spectra of the stars and make Colour-Magnitude Diagrams…

Astrophysics · Physics 2009-11-11 Eline Tolstoy

Hubble's long, stable astrometric baseline creates a rare opportunity for discovery in the Local Group and beyond. Many nearby galaxies, streams, and star clusters already have archival first-epoch imaging in hand, so future HST…