This title is part of UC Press's Voices Revived program, which commemorates University of California Press's mission to seek out and cultivate the brightest minds and give them voice, reach, and ...impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1987.
Abstract
We report on the results of deep and wide-field (1.1 deg2) narrow-band observations with Subaru/Hyper Suprime-Cam (HSC) of a field around a hyperluminous QSO (HLQSO), HS$\, 1549+$1919, ...residing in a protocluster at z = 2.84, to map the large-scale structure of Lyα emitters (LAEs). One HSC pointing enables us to detect 3490 LAEs and 76 extended Lyα blobs (LABs), probing diverse environments from voids to protoclusters. The HLQSO is found to be near the center of the protocluster, which corresponds to the intersection of $\sim \,$100 comoving Mpc-scale structures of LAEs. LABs are basically distributed along the large-scale structure, with larger ones particularly clustering around the HLQSO, confirming a previously noted tendency of LABs to prefer denser environments. Moreover, the shapes of LABs near the HLQSO appear to be aligned with the large-scale structure. Finally, a deep Lyα image reveals a diffuse Lyα nebula along a filamentary structure with no luminous UV/sub-mm counterpart. We suggest that the diffuse nebula is due to a cold filament with high clumping factor illuminated by the QSO, with the required high clumpiness provided by unresolved residing halos of mass $\le 10^{9-10}\, M_\odot$.
Die Novemberrevolution von 1918/19 erschütterte die Tiefenschichten der politischen und gesellschaftlichen Ordnung der Metropole Hamburg. Diese vielschichtige Transformation wird anhand ausgewählter ...Akteur*innen, Institutionen und Ereignisse mit Beiträgen aus der neueren Revolutions-, Konflikt- und Kriegsforschung sowie aus der Kulturwissenschaft, der Geschichts- und Sozialwissenschaft nachgezeichnet. Die Beiträger*innen des Bandes durchleuchten die Dynamiken des revolutionären Wandels im umfassenden Dispositiv der urbanen Machtverhältnisse in ihren diskursiven Formationen: im Geschlechterverhältnis, in den Klassenverhältnissen, in der Wirtschaft, im Bildungswesen, im Film, in den Utopien und Vorstellungen der Menschen der Zeit. Die Beschreibung der dynamischen Umbrüche schließt die Nachbarstadt Altona und die Region ein und verbindet somit Lokales mit Nationalem und Globalem.
The Palomar Cosmic Web Imager (PCWI), an integral field spectrograph designed to detect and map low surface brightness emission, has obtained imaging spectroscopic maps of Ly alpha from the ...circum-QSO medium (CQM) of QSO HS1549+19 at redshift z = 2.843. Extensive extended emission is detected from the CQM, consistent with fluorescent and pumped Ly alpha produced by the ionizing and Ly alpha continuum of the QSO. Many features present in PCWI spectral images match those detected in narrow-band images. Filamentary structures with narrow line profiles are detected in several cases as long as 250-400 kpc. One of these is centered at a velocity redshifted with respect to the systemic velocity, and displays a spatially collimated and kinematically cold line profile increasing in velocity width approaching the QSO. This suggests that the filament gas is infalling onto the QSO, perhaps in a cold accretion flow. Because of the strong ionizing flux, the neutral column density is low, typically N(H I) ~ 10 super(12)-10 super(15) cm super(-2), and the line center optical depth is also low (typically tau sub(0) < 10), insufficient to display well separated double peak emission characteristic of higher line optical depths. With a simple ionization and cloud model we can very roughly estimate the total gas mass (log M sub(gas) = 12.5 + or - 0.5) and the total (log M sub(tot) = 13.3 + or - 0.5). We can also calculate a kinematic mass from the total line profile (2 x 10 super(13) M sub(middot in circle)), which agrees with the mass estimated from the gas emission. The intensity-binned spectrum of the CQM shows a progression in kinematic properties consistent with heirarchical structure formation.
Wars have a great share in the struggle for the establishment of the states of the world. For the Ottoman Empire, these processes continued in certain periods since the struggle for its ...establishment. Many examples can be given of this phenomenon. The geopolitical position of the Ottoman Empire, its rich underground resources and its geography suitable for sea transportation were constantly faced with plans to be included in the war. For this purpose, although the Ottoman Empire secretly took part in alliance activities in order to pursue a balance policy before World War I, only an agreement could be reached with Germany. Within the framework of this aid treaty, the German military delegation tried to strengthen the Ottoman army and naval power with the cruisers Yavuz and Mytilene. In general, although the Ottoman Empire seemed defeated in the First World War, it achieved its aim of protecting its own geography as a part. World War I reflects a new period of establishment struggle for the Ottoman Empire in terms of being the turning point of the world states. In this article, it is aimed to carry out logistical support to the Caucasian front through the Black Sea in order for the Ottoman Empire to want to include the territories lost in the First World War back into its borders. In order to realize this goal, after the Russians bombed the ports of Odessa in World War I, he was involved in the war and lost the Bahr-i Ahmer, Bezm-i Alem and Mithatpaşa ships, which were on their way to bring logistical aid to the Caucasian front, in the Black Sea, and the aid to the front could not reach as planned and its effect was felt greatly. Within the scope of the study, the factors in the failure of the success of the logistic support assistance and its effects on the Caucasian front based on the Bahr-i Ahmer, Bezm-i Alem and Mithatpaşa ferries sunk by the Russians in the Black Sea in World War I will be examined from historical sources within the scope of articles and literature reviews published in national and international journals with scientific validity.
In the aftermath of World War I, the British Empire was hit by two different crises on opposite sides of the world--the Jallianwala Bagh, or Amritsar, Massacre in the Punjab and the Croke Park ...Massacre, the first 'Bloody Sunday', in Ireland. This book provides a study at the cutting edge of British imperial historiography, concentrating on British imperial violence and the concept of collective punishment. This was the 'crisis of empire' following the political and ideological watershed of World War I. The British Empire had reached its greatest geographical extent, appeared powerful, liberal, humane and broadly sympathetic to gradual progress to responsible self-government. Yet the empire was faced with existential threats to its survival with demands for decolonisation, especially in India and Ireland, growing anti-imperialism at home, virtual bankruptcy and domestic social and economic unrest. Providing an original and closely-researched analysis of imperial violence in the aftermath of World War I, this book will be essential reading for historians of empire, South Asia and Ireland.
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