16 research outputs found

    The Evolution of Compact Binary Star Systems

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    We review the formation and evolution of compact binary stars consisting of white dwarfs (WDs), neutron stars (NSs), and black holes (BHs). Binary NSs and BHs are thought to be the primary astrophysical sources of gravitational waves (GWs) within the frequency band of ground-based detectors, while compact binaries of WDs are important sources of GWs at lower frequencies to be covered by space interferometers (LISA). Major uncertainties in the current understanding of properties of NSs and BHs most relevant to the GW studies are discussed, including the treatment of the natal kicks which compact stellar remnants acquire during the core collapse of massive stars and the common envelope phase of binary evolution. We discuss the coalescence rates of binary NSs and BHs and prospects for their detections, the formation and evolution of binary WDs and their observational manifestations. Special attention is given to AM CVn-stars -- compact binaries in which the Roche lobe is filled by another WD or a low-mass partially degenerate helium-star, as these stars are thought to be the best LISA verification binary GW sources.Comment: 105 pages, 18 figure

    The Infantilization of the Colonized: Medical and Psychiatric Descriptions of Drinking Habits in the Colonial Maghreb

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    French doctors and psychiatrists traveling through or working in the colonial Maghreb during the nineteenth and twentieth centuries commonly reported in their publications that the colonized they encountered reminded them of children. They also described practically every aspect of the behavior of the colonized as childlike in some respect. While this equation of the colonized with children was by no means restricted to the medico-psychiatric source material and can be found in a variety of different colonial publications, this chapter will focus on publications by doctors and psychiatrists, as their status as widely accepted experts and as alleged pillars of science and modernity made their statements, in the eyes of their French readership, more authoritative than those of other authors. Though this is usually not stated explicitly, the children imagined in these comparisons were presumably European, which accords with a long tradition of European medical and psychiatric experts comparing the colonized to an imaginary European normality. Yet comparisons of the colonized with children in the publications of French doctors and psychiatrists were more than just colorful and anecdotal descriptions of life in the colonies; they were part of an implicit, ongoing process of diagnosing the behavior of the colonized as intrinsically different from French behavior. These comparisons implicitly suggested that colonized adults and European children were roughly on the same developmental level, and concluded that both groups had a similar relationship to French adults: that is, receiving education from them, following their lead, and letting them make important decisions on their behalf. The framing of the colonized as children highlights the colonial understanding of there being a clear power imbalance in the colonies—with France as the undisputed paterfamilias, so to speak, and with the colonized unable to reach French levels of reason and modernity on their own
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