Results 201 to 210 of about 6,194,227 (235)
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Physics Today, 1966
The most significant progress in x-ray astronomy in the past few years has been brought about by the advent of satellite observatories and by the great number of new radio and optical identifications of cosmic x-ray sources. Since the discovery, with rocket-borne instruments, of extrasolar sources of x radiation ten years ago, it has been clear to most
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The most significant progress in x-ray astronomy in the past few years has been brought about by the advent of satellite observatories and by the great number of new radio and optical identifications of cosmic x-ray sources. Since the discovery, with rocket-borne instruments, of extrasolar sources of x radiation ten years ago, it has been clear to most
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Space Science Reviews, 1981
It is apparent from the large number of topics that are now pursued by observations at X-ray wavelengths that X-ray astronomy ranks with radio and optical astronomy as a discipline that must be applied to a wide range of objects and astrophysical problems.
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It is apparent from the large number of topics that are now pursued by observations at X-ray wavelengths that X-ray astronomy ranks with radio and optical astronomy as a discipline that must be applied to a wide range of objects and astrophysical problems.
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IEEE Transactions on Nuclear Science, 1964
Although searches so far have been restricted to a few small rockets and balloons, some 40 discrete x-ray sources have already been resolved against a diffuse, nearly isotropic background radiation. The strongest source is about 2000 times as bright as the weakest detectable with present rocket instruments.
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Although searches so far have been restricted to a few small rockets and balloons, some 40 discrete x-ray sources have already been resolved against a diffuse, nearly isotropic background radiation. The strongest source is about 2000 times as bright as the weakest detectable with present rocket instruments.
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Nature, 2022
The Chandra X-ray Observatory (Chandra) and the X-ray Multi-Mirror Mission (XMM-Newton) continue to expand the frontiers of knowledge about high-energy processes in the Universe. These groundbreaking observatories lead an X-ray astronomy revolution: revealing the physical processes and extreme conditions involved in producing cosmic X-rays in objects ...
Belinda J. Wilkes +3 more
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The Chandra X-ray Observatory (Chandra) and the X-ray Multi-Mirror Mission (XMM-Newton) continue to expand the frontiers of knowledge about high-energy processes in the Universe. These groundbreaking observatories lead an X-ray astronomy revolution: revealing the physical processes and extreme conditions involved in producing cosmic X-rays in objects ...
Belinda J. Wilkes +3 more
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Journal of Optics, 1984
The observation of X-rays is a relatively new branch of Astronomy. As every new field of science this astronomy had an extremely fast and fruitful development. After twenty years of X ray exploration it is time to summarize the results and to envisage the future. This is the aim of this expose.
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The observation of X-rays is a relatively new branch of Astronomy. As every new field of science this astronomy had an extremely fast and fruitful development. After twenty years of X ray exploration it is time to summarize the results and to envisage the future. This is the aim of this expose.
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Contemporary Physics, 1989
Abstract Forty years ago an experiment mounted on a small sounding rocket measured the X-ray flux emitted by the hot outer layers of our Sun. This event marked the birth of X-ray astronomy, and in the intervening years many bizarre and fascinating objects have been discovered.
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Abstract Forty years ago an experiment mounted on a small sounding rocket measured the X-ray flux emitted by the hot outer layers of our Sun. This event marked the birth of X-ray astronomy, and in the intervening years many bizarre and fascinating objects have been discovered.
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Physics Bulletin, 1972
Undoubtedly the most dramatic event this year on the xray astronomy scene was, paradoxically, observed by radio astronomers – the radio outburst from the xray star Cygnus X-3. On the evening of 2 September, Canadian radio astronomers at the Algonquin observatory working at a frequency of 10.5 GHz observed from the direction of this source the greatest ...
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Undoubtedly the most dramatic event this year on the xray astronomy scene was, paradoxically, observed by radio astronomers – the radio outburst from the xray star Cygnus X-3. On the evening of 2 September, Canadian radio astronomers at the Algonquin observatory working at a frequency of 10.5 GHz observed from the direction of this source the greatest ...
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Some problems in gamma and X-ray astronomy
Space Science Reviews, 1964Introduction 696 1. Radiation Mechanisms 697 1.1. Processes Leading to the Production of Gamma and X Rays 697 1.2. General Expressions for the Radiation Intensity 698 2. Cosmic Rays, Matter, and Thermal Radiation in the Universe 698 2.1. Intensity of Cosmic Rays 698 2.2. Electronic Component of Cosmic Rays 699 2.3.
Vitalii L Ginzburg, S I Syrovatskiĭ
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2002
9.1 Useful Conversions . . . . . . . . . . . . . . . . . . . . 183 9.2 Characteristic X-Ray Transitions . . . . . . . . . . . . 184 9.3 Emission Mechanisms and Spectra . . . . . . . . . . . 184 9.4 Transmission of X-Rays Through the Interstellar Medium . . . . . . . . . . . . . . . . . . . . 194 9.5 Cosmic X-Ray Sources . . . . . . . . . . . . . . . . .
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9.1 Useful Conversions . . . . . . . . . . . . . . . . . . . . 183 9.2 Characteristic X-Ray Transitions . . . . . . . . . . . . 184 9.3 Emission Mechanisms and Spectra . . . . . . . . . . . 184 9.4 Transmission of X-Rays Through the Interstellar Medium . . . . . . . . . . . . . . . . . . . . 194 9.5 Cosmic X-Ray Sources . . . . . . . . . . . . . . . . .
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X-ray astronomy in the Einstein Era
Space Science Reviews, 1981I have chosen as the subject of today’s talk the X-ray observation of extragalactic objects. Since several talks will be given at this meeting regarding the study of nearby normal and active galaxies, I Will confine myself to discuss these objects that are particularly interesting from the point of view of evolution of structure in the universe.
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