Uniformity of the WC stars in the Large Magellanic Cloud
Results on the uniformity of the WC stars in the LMC are presented. It is shown to be a tenable hypothesis that (b-v)sub 0 is the same for all observed stars, thus enabling estimates of absorption in the 30 Dor region where local irregularities are large. The flux in the C IV lambda 5808 line is 3 x...
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| Veröffentlicht in: | The Astrophysical journal 1990, Vol.348 (2), p.471-484 |
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| container_title | The Astrophysical journal |
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| creator | SMITH, L. F SHARA, M. M MOFFAT, A. F. J |
| description | Results on the uniformity of the WC stars in the LMC are presented. It is shown to be a tenable hypothesis that (b-v)sub 0 is the same for all observed stars, thus enabling estimates of absorption in the 30 Dor region where local irregularities are large. The flux in the C IV lambda 5808 line is 3 x 10 to the 36th ergs/sec and is constant within observational errors for all but one of the 10 WC4 stars with available flux data. The flux ratio (lambda 5808/lambda 4650) = - 0.22 + or - 0.1 dex and can be used to determine reddening. The width of the lambda 5808 line is less than that of the lambda 4650 line in WC4 stars and greater in the WO stars. The use of Wolf-Rayet star emission-line fluxes for reddening and distance determination has a great advantage over other techniques: the broad lines stand out clearly even at low spectral resolution. 36 refs. |
| doi_str_mv | 10.1086/168256 |
| format | Article |
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The use of Wolf-Rayet star emission-line fluxes for reddening and distance determination has a great advantage over other techniques: the broad lines stand out clearly even at low spectral resolution. 36 refs.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/168256</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Chicago, IL: University of Chicago Press</publisher><subject>640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources ; 640105 - Astrophysics & Cosmology- Galaxies ; Astronomy ; CARBON STARS ; CHARGE-COUPLED DEVICES ; CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ; COLOR ; DISTANCE ; DISTRIBUTION ; Earth, ocean, space ; EMISSION SPECTRA ; Emission-line stars (of, be, luminous blue variables, wolf-rayet, etc.) ; Exact sciences and technology ; GALAXIES ; INTERSTELLAR SPACE ; LINE WIDTHS ; MAGELLANIC CLOUDS ; MAIN SEQUENCE STARS ; MEASURING METHODS ; OPTICAL PROPERTIES ; ORGANOLEPTIC PROPERTIES ; PHYSICAL PROPERTIES ; SEMICONDUCTOR DEVICES ; SPACE ; SPATIAL DISTRIBUTION ; SPECTRA ; SPECTROPHOTOMETRY ; STARS ; Variable and peculiar stars (including novae) ; WOLF-RAYET STARS</subject><ispartof>The Astrophysical journal, 1990, Vol.348 (2), p.471-484</ispartof><rights>1990 INIST-CNRS</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c309t-10438a5bcaa58d35f259f7ec6e6492dd35081e617ed2cc88f12dce089b0bdb5e3</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,4024,27923,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=6789302$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.osti.gov/biblio/6997460$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>SMITH, L. F</creatorcontrib><creatorcontrib>SHARA, M. M</creatorcontrib><creatorcontrib>MOFFAT, A. F. J</creatorcontrib><title>Uniformity of the WC stars in the Large Magellanic Cloud</title><title>The Astrophysical journal</title><description>Results on the uniformity of the WC stars in the LMC are presented. It is shown to be a tenable hypothesis that (b-v)sub 0 is the same for all observed stars, thus enabling estimates of absorption in the 30 Dor region where local irregularities are large. The flux in the C IV lambda 5808 line is 3 x 10 to the 36th ergs/sec and is constant within observational errors for all but one of the 10 WC4 stars with available flux data. The flux ratio (lambda 5808/lambda 4650) = - 0.22 + or - 0.1 dex and can be used to determine reddening. The width of the lambda 5808 line is less than that of the lambda 4650 line in WC4 stars and greater in the WO stars. 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F</creator><creator>SHARA, M. M</creator><creator>MOFFAT, A. F. J</creator><general>University of Chicago Press</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>1990</creationdate><title>Uniformity of the WC stars in the Large Magellanic Cloud</title><author>SMITH, L. F ; SHARA, M. M ; MOFFAT, A. F. J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c309t-10438a5bcaa58d35f259f7ec6e6492dd35081e617ed2cc88f12dce089b0bdb5e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1990</creationdate><topic>640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources</topic><topic>640105 - Astrophysics & Cosmology- Galaxies</topic><topic>Astronomy</topic><topic>CARBON STARS</topic><topic>CHARGE-COUPLED DEVICES</topic><topic>CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS</topic><topic>COLOR</topic><topic>DISTANCE</topic><topic>DISTRIBUTION</topic><topic>Earth, ocean, space</topic><topic>EMISSION SPECTRA</topic><topic>Emission-line stars (of, be, luminous blue variables, wolf-rayet, etc.)</topic><topic>Exact sciences and technology</topic><topic>GALAXIES</topic><topic>INTERSTELLAR SPACE</topic><topic>LINE WIDTHS</topic><topic>MAGELLANIC CLOUDS</topic><topic>MAIN SEQUENCE STARS</topic><topic>MEASURING METHODS</topic><topic>OPTICAL PROPERTIES</topic><topic>ORGANOLEPTIC PROPERTIES</topic><topic>PHYSICAL PROPERTIES</topic><topic>SEMICONDUCTOR DEVICES</topic><topic>SPACE</topic><topic>SPATIAL DISTRIBUTION</topic><topic>SPECTRA</topic><topic>SPECTROPHOTOMETRY</topic><topic>STARS</topic><topic>Variable and peculiar stars (including novae)</topic><topic>WOLF-RAYET STARS</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>SMITH, L. F</creatorcontrib><creatorcontrib>SHARA, M. M</creatorcontrib><creatorcontrib>MOFFAT, A. F. J</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>SMITH, L. F</au><au>SHARA, M. M</au><au>MOFFAT, A. F. J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Uniformity of the WC stars in the Large Magellanic Cloud</atitle><jtitle>The Astrophysical journal</jtitle><date>1990</date><risdate>1990</risdate><volume>348</volume><issue>2</issue><spage>471</spage><epage>484</epage><pages>471-484</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>Results on the uniformity of the WC stars in the LMC are presented. It is shown to be a tenable hypothesis that (b-v)sub 0 is the same for all observed stars, thus enabling estimates of absorption in the 30 Dor region where local irregularities are large. The flux in the C IV lambda 5808 line is 3 x 10 to the 36th ergs/sec and is constant within observational errors for all but one of the 10 WC4 stars with available flux data. The flux ratio (lambda 5808/lambda 4650) = - 0.22 + or - 0.1 dex and can be used to determine reddening. The width of the lambda 5808 line is less than that of the lambda 4650 line in WC4 stars and greater in the WO stars. The use of Wolf-Rayet star emission-line fluxes for reddening and distance determination has a great advantage over other techniques: the broad lines stand out clearly even at low spectral resolution. 36 refs.</abstract><cop>Chicago, IL</cop><pub>University of Chicago Press</pub><doi>10.1086/168256</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-637X |
| ispartof | The Astrophysical journal, 1990, Vol.348 (2), p.471-484 |
| issn | 0004-637X 1538-4357 |
| language | eng |
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| source | Alma/SFX Local Collection |
| subjects | 640102 - Astrophysics & Cosmology- Stars & Quasi-Stellar, Radio & X-Ray Sources 640105 - Astrophysics & Cosmology- Galaxies Astronomy CARBON STARS CHARGE-COUPLED DEVICES CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS COLOR DISTANCE DISTRIBUTION Earth, ocean, space EMISSION SPECTRA Emission-line stars (of, be, luminous blue variables, wolf-rayet, etc.) Exact sciences and technology GALAXIES INTERSTELLAR SPACE LINE WIDTHS MAGELLANIC CLOUDS MAIN SEQUENCE STARS MEASURING METHODS OPTICAL PROPERTIES ORGANOLEPTIC PROPERTIES PHYSICAL PROPERTIES SEMICONDUCTOR DEVICES SPACE SPATIAL DISTRIBUTION SPECTRA SPECTROPHOTOMETRY STARS Variable and peculiar stars (including novae) WOLF-RAYET STARS |
| title | Uniformity of the WC stars in the Large Magellanic Cloud |
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