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Titlebook: Supermassive Black Holes in the Distant Universe; Amy J. Barger Book 2004 Springer Science+Business Media B.V. 2004 Accretion.Galaxy.Obser

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發(fā)表于 2025-3-21 19:21:35 | 只看該作者 |倒序瀏覽 |閱讀模式
書目名稱Supermassive Black Holes in the Distant Universe
編輯Amy J. Barger
視頻videohttp://file.papertrans.cn/882/881881/881881.mp4
叢書名稱Astrophysics and Space Science Library
圖書封面Titlebook: Supermassive Black Holes in the Distant Universe;  Amy J. Barger Book 2004 Springer Science+Business Media B.V. 2004 Accretion.Galaxy.Obser
描述Quasars, and the menagerie of other galaxies with "unusual nuclei", now collectively known as Active Galactic Nuclei or AGN, have, in one form or another, sparked the interest of astronomers for over 60 years. The only known mechanism that can explain the staggering amounts of energy emitted by the innermost regions of these systems is gravitational energy release by matter falling towards a supermassive black hole --- a black hole whose mass is millions to billions of times the mass of our Sun. AGN emit radiation at all wavelengths. X-rays originating at a distance of a few times the event horizon of the black hole are the emissions closest to the black hole that we can detect; thus, X-rays directly reveal the presence of active supermassive black holes. Oftentimes, however, the supermassive black holes that lie at the centers of AGN are cocooned in gas and dust that absorb the emitted low- energy X-rays and the optical and ultraviolet light, hiding the black hole from view at these wavelengths. Until recently, this low-energy absorption presented a major obstacle in observational efforts to map the accretion history of the universe. In 1999 and 2000, the launches of the Chandra a
出版日期Book 2004
關鍵詞Accretion; Galaxy; Observatories; Quasar; Universe
版次1
doihttps://doi.org/10.1007/978-1-4020-2471-9
isbn_softcover978-90-481-6662-6
isbn_ebook978-1-4020-2471-9Series ISSN 0067-0057 Series E-ISSN 2214-7985
issn_series 0067-0057
copyrightSpringer Science+Business Media B.V. 2004
The information of publication is updating

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Book 2004low- energy X-rays and the optical and ultraviolet light, hiding the black hole from view at these wavelengths. Until recently, this low-energy absorption presented a major obstacle in observational efforts to map the accretion history of the universe. In 1999 and 2000, the launches of the Chandra a
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verview of the technology transfer activities of . carried out for Africa, focusing on technological innovations that result in products and by-products of cassava root processing, especially those with great potential for adoption and opening new markets for Africa (e.g., precooked and frozen cassa
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Richard Mushotzkyling cassava leaves is an emerging?but fast-growing sector. Cassava?leaves also contain cyanogenic toxins normally in higher concentrations than the cassava roots.?In the future, more attention must be paid to the safe processing of cassava?leaves and roots, especially as food processing becomes inc
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Zoltán Haiman,Eliot Quataertopment of nematodes. The key regulators for manipulating plant tissues that allow galls to promulgate are presumed to be phytohormones genes. The allocation of crucial clues to root-gall disease treatment may be mediated by genes. The intricate pattern between growth and defense processes makes unde
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Edward C. Moran pain concerning the storm’s effects is still evident in the city’s inhabitants. It is with this mournful backdrop that I want to explore the cultural output after Hurricane Katrina to reveal how it suggests the racial and social contours of the (Old) South still existing in the twenty-first century
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