Theoretical quasar emission-line ratios. VII - Energy-balance models for finite hydrogen slabs
The present energy balance calculations for finite, isobaric, hydrogen-slab quasar emission line clouds incorporate probabilistic radiative transfer (RT) in all lines and bound-free continua of a five-level continuum model hydrogen atom. Attention is given to the line ratios, line formation regions,...
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| Veröffentlicht in: | Astrophys. J.; (United States) 1985-03, Vol.290 (2), p.394-410 |
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| container_title | Astrophys. J.; (United States) |
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| creator | Hubbard, E. N. Puetter, R. C. |
| description | The present energy balance calculations for finite, isobaric, hydrogen-slab quasar emission line clouds incorporate probabilistic radiative transfer (RT) in all lines and bound-free continua of a five-level continuum model hydrogen atom. Attention is given to the line ratios, line formation regions, level populations and model applicability results obtained. H lines and a variety of other considerations suggest the possibility of emission line cloud densities in excess of 10 to the 10th/cu cm. Lyman-beta/Lyman-alpha line ratios that are in agreement with observed values are obtained by the models. The observed Lyman/Balmer ratios can be achieved with clouds whose column depths are about 10 to the 22nd/sq cm. |
| doi_str_mv | 10.1086/162997 |
| format | Article |
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The observed Lyman/Balmer ratios can be achieved with clouds whose column depths are about 10 to the 22nd/sq cm.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/162997</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) ; Astronomy ; Astrophysics ; ATOMIC MODELS ; BALMER LINES ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COOLING ; COSMIC RADIO SOURCES ; Earth, ocean, space ; ELEMENTARY PARTICLES ; ELEMENTS ; EMISSION SPECTRA ; ENERGY BALANCE ; ENERGY LEVELS ; Exact sciences and technology ; HEATING ; HYDROGEN ; LYMAN LINES ; MASSLESS PARTICLES ; MATHEMATICAL MODELS ; MATHEMATICS ; NONMETALS ; NUMERICAL ANALYSIS ; OPACITY ; OPTICAL PROPERTIES ; PHOTONS ; PHYSICAL PROPERTIES ; PROBABILISTIC ESTIMATION ; QUASARS ; Quasars. 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C.</creatorcontrib><creatorcontrib>Center for Astrophysics and Space Sciences, University of California, San Diego</creatorcontrib><title>Theoretical quasar emission-line ratios. VII - Energy-balance models for finite hydrogen slabs</title><title>Astrophys. J.; (United States)</title><description>The present energy balance calculations for finite, isobaric, hydrogen-slab quasar emission line clouds incorporate probabilistic radiative transfer (RT) in all lines and bound-free continua of a five-level continuum model hydrogen atom. Attention is given to the line ratios, line formation regions, level populations and model applicability results obtained. H lines and a variety of other considerations suggest the possibility of emission line cloud densities in excess of 10 to the 10th/cu cm. Lyman-beta/Lyman-alpha line ratios that are in agreement with observed values are obtained by the models. The observed Lyman/Balmer ratios can be achieved with clouds whose column depths are about 10 to the 22nd/sq cm.</description><subject>640103 - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987)</subject><subject>Astronomy</subject><subject>Astrophysics</subject><subject>ATOMIC MODELS</subject><subject>BALMER LINES</subject><subject>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</subject><subject>COOLING</subject><subject>COSMIC RADIO SOURCES</subject><subject>Earth, ocean, space</subject><subject>ELEMENTARY PARTICLES</subject><subject>ELEMENTS</subject><subject>EMISSION SPECTRA</subject><subject>ENERGY BALANCE</subject><subject>ENERGY LEVELS</subject><subject>Exact sciences and technology</subject><subject>HEATING</subject><subject>HYDROGEN</subject><subject>LYMAN LINES</subject><subject>MASSLESS PARTICLES</subject><subject>MATHEMATICAL MODELS</subject><subject>MATHEMATICS</subject><subject>NONMETALS</subject><subject>NUMERICAL ANALYSIS</subject><subject>OPACITY</subject><subject>OPTICAL PROPERTIES</subject><subject>PHOTONS</subject><subject>PHYSICAL PROPERTIES</subject><subject>PROBABILISTIC ESTIMATION</subject><subject>QUASARS</subject><subject>Quasars. Active or peculiar galaxies, objects, and systems</subject><subject>RADIATION TRANSPORT</subject><subject>SPECTRA</subject><subject>Stellar systems. Galactic and extragalactic objects and systems. The universe</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1985</creationdate><recordtype>article</recordtype><sourceid>CYI</sourceid><recordid>eNpFkd9LHDEQx0NR8NT6F_QhFPFtbbL5_Sii7YHQF1t8ashmZ72UvUQzew_33xs5aWFgGPjwZeYzhFxwds2Z1d-47p0zn8iKK2E7KZQ5IivGmOy0ME8n5BTx7_vYqBX587iBUmFJMcz0dRcwVArbhJhK7uaUgdawpILX9Pd6TTt6l6E-77shzCFHoNsywox0KpVOKacF6GY_1vIMmeIcBjwnx1OYET5_9DPy6_7u8fZH9_Dz-_r25qGL3GjZRe0kZ9IG3tvBggnGKSfdqGDg3LJWQWg-MLAOghuHHpjgVtgRtOJCBnFGvh5yCy7JY2ybxE0sOUNcvFJSS2kadHWAXmp53QEuvh0aYW6nQNmh76VVvO_lfzDWglhh8i81bUPde878u2N_cNzAy4_EgE3gVJuUhP9ox3VbXjfsywHLza_PS0XPnVXtB9b0RrwB9muBJw</recordid><startdate>19850315</startdate><enddate>19850315</enddate><creator>Hubbard, E. N.</creator><creator>Puetter, R. 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C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c1764-c6941048a128b8e7a795949d5eb1180180a361b0e89ea9db2e031838de65134a3</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>Astronomy</topic><topic>Astrophysics</topic><topic>ATOMIC MODELS</topic><topic>BALMER LINES</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COOLING</topic><topic>COSMIC RADIO SOURCES</topic><topic>Earth, ocean, space</topic><topic>ELEMENTARY PARTICLES</topic><topic>ELEMENTS</topic><topic>EMISSION SPECTRA</topic><topic>ENERGY BALANCE</topic><topic>ENERGY LEVELS</topic><topic>Exact sciences and technology</topic><topic>HEATING</topic><topic>HYDROGEN</topic><topic>LYMAN LINES</topic><topic>MASSLESS PARTICLES</topic><topic>MATHEMATICAL MODELS</topic><topic>MATHEMATICS</topic><topic>NONMETALS</topic><topic>NUMERICAL ANALYSIS</topic><topic>OPACITY</topic><topic>OPTICAL PROPERTIES</topic><topic>PHOTONS</topic><topic>PHYSICAL PROPERTIES</topic><topic>PROBABILISTIC ESTIMATION</topic><topic>QUASARS</topic><topic>Quasars. Active or peculiar galaxies, objects, and systems</topic><topic>RADIATION TRANSPORT</topic><topic>SPECTRA</topic><topic>Stellar systems. Galactic and extragalactic objects and systems. The universe</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hubbard, E. N.</creatorcontrib><creatorcontrib>Puetter, R. C.</creatorcontrib><creatorcontrib>Center for Astrophysics and Space Sciences, University of California, San Diego</creatorcontrib><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>Astrophys. J.; (United States)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hubbard, E. N.</au><au>Puetter, R. C.</au><aucorp>Center for Astrophysics and Space Sciences, University of California, San Diego</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Theoretical quasar emission-line ratios. VII - Energy-balance models for finite hydrogen slabs</atitle><jtitle>Astrophys. J.; (United States)</jtitle><date>1985-03-15</date><risdate>1985</risdate><volume>290</volume><issue>2</issue><spage>394</spage><epage>410</epage><pages>394-410</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>The present energy balance calculations for finite, isobaric, hydrogen-slab quasar emission line clouds incorporate probabilistic radiative transfer (RT) in all lines and bound-free continua of a five-level continuum model hydrogen atom. Attention is given to the line ratios, line formation regions, level populations and model applicability results obtained. H lines and a variety of other considerations suggest the possibility of emission line cloud densities in excess of 10 to the 10th/cu cm. Lyman-beta/Lyman-alpha line ratios that are in agreement with observed values are obtained by the models. The observed Lyman/Balmer ratios can be achieved with clouds whose column depths are about 10 to the 22nd/sq cm.</abstract><cop>Legacy CDMS</cop><pub>University of Chicago Press</pub><doi>10.1086/162997</doi><tpages>17</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Astrophys. J.; (United States), 1985-03, Vol.290 (2), p.394-410 |
| issn | 0004-637X 1538-4357 |
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| source | NASA Technical Reports Server; Alma/SFX Local Collection |
| subjects | 640103 - Astrophysics & Cosmology- Quasi-Stellar, Radio, & X-Ray Sources- (-1987) Astronomy Astrophysics ATOMIC MODELS BALMER LINES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COOLING COSMIC RADIO SOURCES Earth, ocean, space ELEMENTARY PARTICLES ELEMENTS EMISSION SPECTRA ENERGY BALANCE ENERGY LEVELS Exact sciences and technology HEATING HYDROGEN LYMAN LINES MASSLESS PARTICLES MATHEMATICAL MODELS MATHEMATICS NONMETALS NUMERICAL ANALYSIS OPACITY OPTICAL PROPERTIES PHOTONS PHYSICAL PROPERTIES PROBABILISTIC ESTIMATION QUASARS Quasars. Active or peculiar galaxies, objects, and systems RADIATION TRANSPORT SPECTRA Stellar systems. Galactic and extragalactic objects and systems. The universe |
| title | Theoretical quasar emission-line ratios. VII - Energy-balance models for finite hydrogen slabs |
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