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Abstract
type:Article
Under the radiative environment of the intense radiation field around active phenomena such as black hole accretion disks, gaseous particles receive a strong radiative flux, which accelerates them, while they suffer from radiation drag by aberrated photons, which decelerates them. As a result, the acceleration of gaseous particles—photon surfing—would terminate at some magical speed βm(=v/c); (4-√7)/3 ~ 0.45 for acceleration above an infinite flat radiator (Icke 1989, A&A, 216, 294). In a realistic gaseous cloud, part of the radiation would be absorbed by the cloud, some would be reflected, and some transmitted. We examine these translucent effects for a geometrically thin gaseous cloud (stratus). When the optical depth of the stratus is sufficiently large, the terminal speed is the well known magical speed βm for a particle. When the optical depth is around or less than unity, on the other hand, the terminal magical speed becomes large, up to ~ 0.7c. This is just the translucent effect; the aberrated photons from the top of the stratus transmit the stratus much more than the direct photons from the bottom of the stratus facing the source.
Journal
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- PASJ:Publications of the Astronomical Society of Japan
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PASJ:Publications of the Astronomical Society of Japan 66 (1), 13-1-13-7, 2014-02-07
Oxford University Press
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Details 詳細情報について
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- CRID
- 1050006973328217984
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- NII Article ID
- 40020043466
- 120007052943
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- NII Book ID
- AA1082896X
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- ISSN
- 00046264
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- NDL BIB ID
- 025408639
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- Text Lang
- en
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- Article Type
- journal article
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- Data Source
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- IRDB
- NDL
- CiNii Articles