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The Resolved Stellar Populations of M 32
We present the deepest optical CMD to date of M 32, obtained from HST ACS/HRC images. The dominant feature is the RC, whose CMD location suggests a mean age between 8 and 10 Gyr for [Fe/H] = -0.2 in M 32. We detect for the first time the RGB and AGB bumps in M 32 which constrain its mean age to be 5-10 Gyr old at 2' from the center. Bright AGB stars indicate the presence of intermediate-age populations. A detected blue component of stars may indicate for the first time the presence of a young stellar population of ~0.5 Gyr in our M 32 field. However, it is likely that the younger stars of this blue plume belong to M 31 rather than to M 32. The fainter stars populating the blue plume indicate the presence of stars not younger than 1 Gyr and/or blue straggler stars in M 32.
Stellar Populations
IAU Symposium 262 presents reviews on the current understanding of the theories of stellar evolution, galaxy formation and galaxy evolution. It emphasises what we have learned in the past few years from massive surveys covering large portions of the sky (e.g. SDSS, HDF, UDF, GOODS, COSMOS). Several critical aspects of research on stellar populations deserve further effort in order to be brought in tune with other areas of astrophysical research. The next ten years will see the opening of major observatories that will increase the quality and quantity of astronomical data by orders of magnitude. The expected benefits from these instruments for the study of stellar populations are explored. This critical review of state of the art observational and theoretical work will appeal to all those working on stellar populations, from distant galaxies to local resolved galaxies and galactic star clusters.
Pathways Through an Eclectic Universe
"This book contains the proceedings of a conference, held on 23-27 April in Tenerife, to discuss recent progress on star formation in galaxies. Presentations took into account advances in related areas such as the structure, dynamics, and evolution of galaxies, their stellar and dark matter components, central black holes as clues to their histories, the physics of the interstellar medium, and the feedback on all spatial scales between star formation and the host galaxy. This volume contains more than a hundred papers on these topics including invited reviews, invited and contributed talks, poster presentations, and two panel discussion sessions. These articles provide an in-depth assessment...
CRAL-2010
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Spectral Line Shapes in Astrophysics
The VI Serbian Conference on Spectral Line Shapes in Astrophysics was about the investigation of spectral line shapes in extragalactic objects, such as, active galactic nuclei, stellar atmospheres, and astrophysical spectra in general. Atomic spectral line shapes in various discharges and plasma devices was also discussed. The main purpose of the Conference was to present and discuss new results found by participants working in this research field, and to review significant topics.
Low-metallicity Star Formation (IAU S255)
Although low-mass metal-poor galaxies in the local universe have often been proposed as the 'primordial building blocks' in the hierarchical scenario of structure formation, several lines of evidence suggest that this may not be true. Moreover, it is not clear to what extent dwarf galaxies, because they are metal poor and because of their kinematics and structure, can tell us about how star formation proceeded in the early universe. This volume provides an overview and the most recent advances in this debate. IAU Symposium 255 presents the most up-to-date developments in six key areas, including: Population III and metal-free star formation; metal-enrichment, chemical evolution and feedback; explosive events in low-metallicity environments; dust and gas as seeds for metal-poor star formation; metal-poor initial mass functions, stellar evolution and star-formation histories; and low-metallicity star formation in the local universe. This overview is at a level suitable for research astronomers and graduate students.
Les Populations Stellaires Des Galaxies Naines Elliptiques
The past of the galaxies is imprinted in their stellar populations. The most numerous galaxies in the Universe are the dwarf ellipticals (dEs), left-over of the hierarchical mass-assembly. Consequently, the evolution of the Universe can be read from the stellar populations of the dwarf elliptical galaxies. In this thesis I present and validate an accurate and efficient method to study the age and metallicity evolution in stellar systems using spectra integrated along the line-ofsight. It was extensively tested and validated on a library of 40 Galactic globular clusters and applied to a sample of 16 dwarf elliptical galaxies in cluster and group environments and to NGC 205. The comparison bet...
Large Scale Collaborative Virtual Environments
Collaborative virtual environments are multi-user virtual realities which actively support communication and co-operation. This book addresses the theory, design, realisation and evaluation of such systems, with a particular emphasis on support for large numbers of distributed users. A broad approach is taken, which ranges from the sociology of interpersonal communication to the management of communication in distributed systems. The emphasis on multi-user environments distinguishes this book from the many general books on virtual reality which only deal with single-user systems. This book presents: models of multi-party awareness and interaction in space-based systems; detailed designs of two prototypes (MASSIVE-1 and MASSIVE-2); experiences with collaborative virtual environments created using these; and analyses of the corresponding network requirements. Many of these results and ideas are applicable to other systems and approaches.
Breast Cancer Prevention and Treatment
Uniquely designed for oncologists and general practitioners, this book offers clinicians comprehensive guidelines when dealing with women at high risk for breast cancer. Written by experts in the field on the cutting edge of this research, the following questions will be answered for the reader by the end of the book: · Who is at elevated risk for breast cancer? · Who should be genetically screened? · When and how often should we obtain imaging? · What type of imaging is adequate? · What medications are available for prevention? · When is surgical intervention appropriate? · What lifestyle changes should be implemented to prevent this disaster? With one in eight women likely to contract breast cancer in her lifetime, the significance of identifying and managing the high-risk patient is evident. Breakthroughs in the identification of genes associated with breast carcinoma, particularly BRCA1 and 2, as well as other risk factors, influence not only how patients are screened, but also how they are treated. Breast Cancer Prevention and Treatment provides a guided approach to prevention of breast cancer in women at elevated risk for this malignancy.
