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The existence of blue straggler stars, which appear younger, hotter, and more massive than their siblings, is at odds with a simple picture of stellar evolution. Such stars should have exhausted their nuclear fuel and evolved long ago to become cooling white dwarfs. They are found to exist in globular clusters, open clusters, dwarf spheroidal galaxies of the Local Group, OB associations and as field stars. This book summarises the many advances in observational and theoretical work dedicated to blue straggler stars. Carefully edited extended contributions by well-known experts in the field cover all the relevant aspects of blue straggler stars research: Observations of blue straggler stars in their various environments; Binary stars and formation channels; Dynamics of globular clusters; Interpretation of observational data and comparison with models. The book also offers an introductory chapter on stellar evolution written by the editors of the book.
Understanding the stars is the bedrock of modern astrophysics. Stars are the source of life. The chemical enrichment of our Milky Way and of the Universe withallelementsheavierthanlithiumoriginatesintheinteriorsofstars.Stars arethe tracersofthe dynamics ofthe Universe,gravitationallyimplying much more than meets the eye. Stars ionize the interstellar medium and re-ionized the early intergalactic medium. Understanding stellar structure and evolution is fundamental. While stellar structure and evolution are understood in general terms, we lack important physical ingredients, despite extensive research during recent decades.Classicalspectroscopy,photometry,astrometryandinterferometryof stars have traditionally been used as observational constraints to deduce the internal stellar physics. Unfortunately, these types of observations only allow the tuning of the basic common physics laws under stellar conditions with relatively poor precision. The situation is even more worrisome for unknown aspects of the physics and dynamics in stars. These are usually dealt with by using parameterised descriptions of, e.g., the treatments of convection, rotation,angularmomentumtransport,theequationofstate,atomicdi?usion andsettlingofelements,magneto-hydrodynamicalprocesses,andmore.There is a dearth of observational constraints on these processes, thus solar values areoftenassignedtothem.Yetitishardtoimaginethatonesetofparameters is appropriate for the vast range of stars.
"This is a truly astonishing book, invaluable for anyone with an interest in astronomy." Physics Bulletin "Just the thing for a first year university science course." Nature "This is a beautiful book in both concept and execution." Sky & Telescope
The classification of stars into their various types is one of the fundamental areas of astronomy. This book is a comprehensive handbook on the tools, methods and results of stellar taxonomy. Although this subject is firmly rooted in classical astronomy, vast improvements in observational techniques have transformed the subject and greatly broadened the wavelength regions available for study. The first six chapters describe modern methods of spectroscopic and photometric classification. The remaining nine chapters describe particular families of stars, progressing from the hottest to the coolest. Within each category a description is given of the normal type and all the peculiar stars. Throughout the emphasis is on the phenomenology of classification, rather than the underlying astrophysics. Both authors have devoted themselves to developing the international centre for stellar data at Strasbourg, which uniquely qualifies them to write this definitive handbook for professional astronomers.
This book contains the proceedings of IAU Symposium No. 151 `Evolutionary Processes in Interacting Binary Stars,' which was held from 5 to 9 August 1991 in Cordóba, Argentina. The primary aim of this conference was to review and evaluate our current understanding of the evolutionary processes in wide variety of interacting binary stars from their births to their deaths. Subjects included the formation of binaries, mass flow and transfer, accretion processes, and binaries with collapsed components, such as novae, X-ray binaries and binary pulsars. As the field covered is both broad and diverse, there were in all thirty-seven invited talks; sixty-two contributed papers were also presented. In addition, these proceedings contain comments from a panel discussion of the major unsolved problems of interacting binary stars.
Kathy Lynn Harris' clever debut novel is a laugh-out-loud, yet poignant, story about good friends, bad choices, quirky families and new beginnings - a Texas version of Anna Maxted's Getting Over It with the wit and humor of a Melissa Banks story.Just what is a blue straggler? A blue straggler is a star that appears to be disconnected from those stars surrounding it in its globular cluster and has an anomalous blue color and high luminosity relative to those stars that surround it.But this is not a story about astronomy.Bailey Miller is "disconnected" from the cluster of her rural south Texas family. She has never quite fit in and now in her early 30s, she finds herself struggling with inner turmoil and a series of bad choices in her life.She blames many of her personal demons, and there are many, on a self-proclaimed condition called "RODA"- short for Recurring, Obstinate Dread and Anguish. She's drinking too much (even for a member of her family), has a penchant to eat spoonful after spoonful of Cool Whip, works in a job that bores her beyond description and can't keep a relationship longer than it takes for milk to expire in her fridge.Even with the help of her two outspoken friends, Idamarie - owner of a local cafe and fourth-generation Texas woman with the big hair to prove it - and her quirky college pal Rudy, she's having a hard time.As a series of sometimes humorous, often semi-tragic, events send her reeling, Bailey packs up her Honda and heads out of Texas, in search of herself and answers to secrets from her great-grandmother's past.Chock full of memorable characters, this novel takes readers on a journey from San Antonio to a small mountain town in Colorado and back, as Bailey uncovers not only the secrets of her great-grandmother's life, but also her own, and finding love along the way.In the end, you'll ask yourself, as Bailey does: Are bad choices passed down through generations like tarnished wedding silver, frayed quilts and not-so-tasteful costume jewelry? Can we really define family and home for ourselves, or does the past always determine who we are today?
A magisterial account of the interaction between the law and racial oppression in America, from colonial times to the present, this book demonstrates how the one agent that should have guaranteed equal treatment before the law--the judicial system--instead played a dominant role in enforcing the inferior position of blacks. 43 photos.
This book discusses in detail all the relevant numerical methods for the classical N-body problem. It demonstrates how to develop clear and elegant algorithms for models of gravitational systems, and explains the fundamental mathematical tools needed to describe the dynamics of a large number of mutually attractive particles. Particular attention is given to the techniques needed to model astrophysical phenomena such as close encounters and the dynamics of black hole binaries. The author reviews relevant work in the field and covers applications to the problems of planetary formation and star cluster dynamics, both of Pleiades type and globular clusters. Self-contained and pedagogical, this book is suitable for graduate students and researchers in theoretical physics, astronomy and cosmology.