O VIII resonant absorption in PKS 2155 - 304 - A hot wind
The broad X-ray absorption feature in PKS 2155 - 304 could be due to O VIII Ly-alpha resonant absorption in a wind with outflow speeds up to about 30,000 km/s. The properties of such a wind are calculated. A homogeneous, spherically symmetric wind would involve a mass flux of about a 1000 solar mass...
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| Veröffentlicht in: | Astrophys. J.; (United States) 1985-08, Vol.295 (1), p.104-108 |
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| container_title | Astrophys. J.; (United States) |
| container_volume | 295 |
| creator | Krolik, J. H. Kallman, T. R. Fabian, A. C. Rees, M. J. |
| description | The broad X-ray absorption feature in PKS 2155 - 304 could be due to O VIII Ly-alpha resonant absorption in a wind with outflow speeds up to about 30,000 km/s. The properties of such a wind are calculated. A homogeneous, spherically symmetric wind would involve a mass flux of about a 1000 solar masses/year, but this estimate could be greatly reduced if the outflow were beamed, and/or the absorbing gas were clumped into small clouds. In the latter case, the O VIII absorption offers clues to the physical state of thermal material closer to the central energy source than the clouds which produce optical emission lines in quasars. |
| doi_str_mv | 10.1086/163355 |
| format | Article |
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In the latter case, the O VIII absorption offers clues to the physical state of thermal material closer to the central energy source than the clouds which produce optical emission lines in quasars.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/163355</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Legacy CDMS: University of Chicago Press</publisher><subject>640103 - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987) ; ABSORPTION ; Astronomy ; Astrophysics ; BL LACERTAE OBJECTS ; CHARGED PARTICLES ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COSMIC GASES ; COSMIC RADIO SOURCES ; Earth, ocean, space ; EQUILIBRIUM ; Exact sciences and technology ; FLUID FLOW ; FLUIDS ; GAS FLOW ; GASES ; IONIZATION ; IONS ; LYMAN LINES ; OXYGEN IONS ; PHOTOIONIZATION ; QUASARS ; RADIATION SOURCES ; Radio sources ; RESONANCE ABSORPTION ; SPECTRA ; Stellar systems. 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In the latter case, the O VIII absorption offers clues to the physical state of thermal material closer to the central energy source than the clouds which produce optical emission lines in quasars.</description><subject>640103 - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987)</subject><subject>ABSORPTION</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>BL LACERTAE OBJECTS</subject><subject>CHARGED PARTICLES</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COSMIC GASES</subject><subject>COSMIC RADIO SOURCES</subject><subject>Earth, ocean, space</subject><subject>EQUILIBRIUM</subject><subject>Exact sciences and technology</subject><subject>FLUID FLOW</subject><subject>FLUIDS</subject><subject>GAS FLOW</subject><subject>GASES</subject><subject>IONIZATION</subject><subject>IONS</subject><subject>LYMAN LINES</subject><subject>OXYGEN IONS</subject><subject>PHOTOIONIZATION</subject><subject>QUASARS</subject><subject>RADIATION SOURCES</subject><subject>Radio sources</subject><subject>RESONANCE ABSORPTION</subject><subject>SPECTRA</subject><subject>Stellar systems. 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J.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c261t-2fb0e23c88fd5c08117a843b62d9c84cfa3eab42377a02c1d4f4b121acc5bae73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1985</creationdate><topic>640103 - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987)</topic><topic>ABSORPTION</topic><topic>Astronomy</topic><topic>Astrophysics</topic><topic>BL LACERTAE OBJECTS</topic><topic>CHARGED PARTICLES</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COSMIC GASES</topic><topic>COSMIC RADIO SOURCES</topic><topic>Earth, ocean, space</topic><topic>EQUILIBRIUM</topic><topic>Exact sciences and technology</topic><topic>FLUID FLOW</topic><topic>FLUIDS</topic><topic>GAS FLOW</topic><topic>GASES</topic><topic>IONIZATION</topic><topic>IONS</topic><topic>LYMAN LINES</topic><topic>OXYGEN IONS</topic><topic>PHOTOIONIZATION</topic><topic>QUASARS</topic><topic>RADIATION SOURCES</topic><topic>Radio sources</topic><topic>RESONANCE ABSORPTION</topic><topic>SPECTRA</topic><topic>Stellar systems. Galactic and extragalactic objects and systems. The universe</topic><topic>Unidentified sources and radiation outside the solar system</topic><topic>X-RAY SPECTRA</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Krolik, J. H.</creatorcontrib><creatorcontrib>Kallman, T. R.</creatorcontrib><creatorcontrib>Fabian, A. C.</creatorcontrib><creatorcontrib>Rees, M. 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J.</au><aucorp>Harvard-Smithsonian Center for Astrophysics</aucorp><aucorp>Department of Physics and Astronomy, Johns Hopkins University</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>O VIII resonant absorption in PKS 2155 - 304 - A hot wind</atitle><jtitle>Astrophys. J.; (United States)</jtitle><date>1985-08-01</date><risdate>1985</risdate><volume>295</volume><issue>1</issue><spage>104</spage><epage>108</epage><pages>104-108</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>The broad X-ray absorption feature in PKS 2155 - 304 could be due to O VIII Ly-alpha resonant absorption in a wind with outflow speeds up to about 30,000 km/s. The properties of such a wind are calculated. A homogeneous, spherically symmetric wind would involve a mass flux of about a 1000 solar masses/year, but this estimate could be greatly reduced if the outflow were beamed, and/or the absorbing gas were clumped into small clouds. In the latter case, the O VIII absorption offers clues to the physical state of thermal material closer to the central energy source than the clouds which produce optical emission lines in quasars.</abstract><cop>Legacy CDMS</cop><pub>University of Chicago Press</pub><doi>10.1086/163355</doi><tpages>5</tpages></addata></record> |
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| ispartof | Astrophys. J.; (United States), 1985-08, Vol.295 (1), p.104-108 |
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| source | NASA Technical Reports Server; Alma/SFX Local Collection |
| subjects | 640103 - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987) ABSORPTION Astronomy Astrophysics BL LACERTAE OBJECTS CHARGED PARTICLES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COSMIC GASES COSMIC RADIO SOURCES Earth, ocean, space EQUILIBRIUM Exact sciences and technology FLUID FLOW FLUIDS GAS FLOW GASES IONIZATION IONS LYMAN LINES OXYGEN IONS PHOTOIONIZATION QUASARS RADIATION SOURCES Radio sources RESONANCE ABSORPTION SPECTRA Stellar systems. Galactic and extragalactic objects and systems. The universe Unidentified sources and radiation outside the solar system X-RAY SPECTRA |
| title | O VIII resonant absorption in PKS 2155 - 304 - A hot wind |
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