ULTRAVIOLET SPECTROSCOPIC ANALYSIS OF TRANSIENT MASS FLOW OUTBURST IN U CEPHEI
Spectra from the International Ultraviolet Explorer taken in 1989 September over one full orbital period of U Cephei (U Cep, HD 5796) are analyzed. The TLUSTY and SYNSPEC stellar atmospheric simulation programs are used to generate synthetic spectra to which U Cep continuum levels are normalized. Ab...
Gespeichert in:
| Veröffentlicht in: | The Astrophysical journal 2013-09, Vol.775 (1), p.1-21 |
|---|---|
| Hauptverfasser: | , , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 21 |
|---|---|
| container_issue | 1 |
| container_start_page | 1 |
| container_title | The Astrophysical journal |
| container_volume | 775 |
| creator | Tupa, Peter R DeLeo, Gary G McCluskey, George E Kondo, Yoji Sahade, Jorge Gimenez, Alvaro Caton, Daniel B |
| description | Spectra from the International Ultraviolet Explorer taken in 1989 September over one full orbital period of U Cephei (U Cep, HD 5796) are analyzed. The TLUSTY and SYNSPEC stellar atmospheric simulation programs are used to generate synthetic spectra to which U Cep continuum levels are normalized. Absorption lines attributed to the photosphere are divided out to isolate mass flow and accretion spectra. A radial velocity curve is constructed for conspicuous gas stream features, and shows evidence for a transient flow during secondary eclipse with outward velocities ranging between 200 and 350 km s super(-1), and a number density of (3 + or - 2) x 10 super(10) cm super(-3). The validity of C iv 1548 and 1550 and Si iv 1393 and 1402 lines are re-examined in the context of extreme rotational blending effects. A G-star to B-star mass transfer rate of (5 + or - 4) x 10 super(-9). |
| doi_str_mv | 10.1088/0004-637X/775/1/46 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_osti_</sourceid><recordid>TN_cdi_osti_scitechconnect_22270933</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1705083214</sourcerecordid><originalsourceid>FETCH-LOGICAL-c385t-19800895bedb5346360bdda42462b7a2e92c5ef90820a5ccb9ae4552224965c83</originalsourceid><addsrcrecordid>eNqN0ctKw0AUBuBBFKzVF3A14MZNzNwzs4whtYGYlCbxshqS6RQrbVMz6cK3N6Hi2tXhwMeB8_8A3GL0gJGUPkKIeYIGb34QcB_7TJyBCeZUeozy4BxM_sAluHLuc1yJUhOQVWm5DF-SPI1LWCziqFzmRZQvkgiGWZi-F0kB8xkcTFYkcVbC57Ao4CzNX2FelY_VsihhksEKRvFiHifX4GJdb529-Z1TUM3iMpp7af6URGHqGSp572ElEZKKN3bVcMoEFahZrWpGmCBNUBOriOF2rZAkqObGNKq2jHNCCFOCG0mn4O50t3X9Rjuz6a35MO1-b02vBxYgRemg7k_q0LVfR-t6vds4Y7fbem_bo9M4wFKJQAjyD4o4kpRgNlByoqZrnevsWh-6za7uvjVGemxDj-nqMWw9tKGxHh78AeLBdBo</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1705083214</pqid></control><display><type>article</type><title>ULTRAVIOLET SPECTROSCOPIC ANALYSIS OF TRANSIENT MASS FLOW OUTBURST IN U CEPHEI</title><source>EZB-FREE-00999 freely available EZB journals</source><source>Institute of Physics Open Access Journal Titles</source><source>Alma/SFX Local Collection</source><creator>Tupa, Peter R ; DeLeo, Gary G ; McCluskey, George E ; Kondo, Yoji ; Sahade, Jorge ; Gimenez, Alvaro ; Caton, Daniel B</creator><creatorcontrib>Tupa, Peter R ; DeLeo, Gary G ; McCluskey, George E ; Kondo, Yoji ; Sahade, Jorge ; Gimenez, Alvaro ; Caton, Daniel B</creatorcontrib><description>Spectra from the International Ultraviolet Explorer taken in 1989 September over one full orbital period of U Cephei (U Cep, HD 5796) are analyzed. The TLUSTY and SYNSPEC stellar atmospheric simulation programs are used to generate synthetic spectra to which U Cep continuum levels are normalized. Absorption lines attributed to the photosphere are divided out to isolate mass flow and accretion spectra. A radial velocity curve is constructed for conspicuous gas stream features, and shows evidence for a transient flow during secondary eclipse with outward velocities ranging between 200 and 350 km s super(-1), and a number density of (3 + or - 2) x 10 super(10) cm super(-3). The validity of C iv 1548 and 1550 and Si iv 1393 and 1402 lines are re-examined in the context of extreme rotational blending effects. A G-star to B-star mass transfer rate of (5 + or - 4) x 10 super(-9).</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1088/0004-637X/775/1/46</identifier><language>eng</language><publisher>United States</publisher><subject>APPROXIMATIONS ; ASTROPHYSICS ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; Atmospherics ; CEPHEIDS ; COMPUTERIZED SIMULATION ; Density ; ECLIPSE ; Mass flow ; MASS TRANSFER ; Orbitals ; PHOTOSPHERE ; RADIAL VELOCITY ; S CODES ; Spectra ; STAR ACCRETION ; T CODES ; TRANSIENTS ; Ultraviolet ; ULTRAVIOLET RADIATION</subject><ispartof>The Astrophysical journal, 2013-09, Vol.775 (1), p.1-21</ispartof><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c385t-19800895bedb5346360bdda42462b7a2e92c5ef90820a5ccb9ae4552224965c83</citedby><cites>FETCH-LOGICAL-c385t-19800895bedb5346360bdda42462b7a2e92c5ef90820a5ccb9ae4552224965c83</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,776,780,881,27901,27902</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22270933$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Tupa, Peter R</creatorcontrib><creatorcontrib>DeLeo, Gary G</creatorcontrib><creatorcontrib>McCluskey, George E</creatorcontrib><creatorcontrib>Kondo, Yoji</creatorcontrib><creatorcontrib>Sahade, Jorge</creatorcontrib><creatorcontrib>Gimenez, Alvaro</creatorcontrib><creatorcontrib>Caton, Daniel B</creatorcontrib><title>ULTRAVIOLET SPECTROSCOPIC ANALYSIS OF TRANSIENT MASS FLOW OUTBURST IN U CEPHEI</title><title>The Astrophysical journal</title><description>Spectra from the International Ultraviolet Explorer taken in 1989 September over one full orbital period of U Cephei (U Cep, HD 5796) are analyzed. The TLUSTY and SYNSPEC stellar atmospheric simulation programs are used to generate synthetic spectra to which U Cep continuum levels are normalized. Absorption lines attributed to the photosphere are divided out to isolate mass flow and accretion spectra. A radial velocity curve is constructed for conspicuous gas stream features, and shows evidence for a transient flow during secondary eclipse with outward velocities ranging between 200 and 350 km s super(-1), and a number density of (3 + or - 2) x 10 super(10) cm super(-3). The validity of C iv 1548 and 1550 and Si iv 1393 and 1402 lines are re-examined in the context of extreme rotational blending effects. A G-star to B-star mass transfer rate of (5 + or - 4) x 10 super(-9).</description><subject>APPROXIMATIONS</subject><subject>ASTROPHYSICS</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Atmospherics</subject><subject>CEPHEIDS</subject><subject>COMPUTERIZED SIMULATION</subject><subject>Density</subject><subject>ECLIPSE</subject><subject>Mass flow</subject><subject>MASS TRANSFER</subject><subject>Orbitals</subject><subject>PHOTOSPHERE</subject><subject>RADIAL VELOCITY</subject><subject>S CODES</subject><subject>Spectra</subject><subject>STAR ACCRETION</subject><subject>T CODES</subject><subject>TRANSIENTS</subject><subject>Ultraviolet</subject><subject>ULTRAVIOLET RADIATION</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNqN0ctKw0AUBuBBFKzVF3A14MZNzNwzs4whtYGYlCbxshqS6RQrbVMz6cK3N6Hi2tXhwMeB8_8A3GL0gJGUPkKIeYIGb34QcB_7TJyBCeZUeozy4BxM_sAluHLuc1yJUhOQVWm5DF-SPI1LWCziqFzmRZQvkgiGWZi-F0kB8xkcTFYkcVbC57Ao4CzNX2FelY_VsihhksEKRvFiHifX4GJdb529-Z1TUM3iMpp7af6URGHqGSp572ElEZKKN3bVcMoEFahZrWpGmCBNUBOriOF2rZAkqObGNKq2jHNCCFOCG0mn4O50t3X9Rjuz6a35MO1-b02vBxYgRemg7k_q0LVfR-t6vds4Y7fbem_bo9M4wFKJQAjyD4o4kpRgNlByoqZrnevsWh-6za7uvjVGemxDj-nqMWw9tKGxHh78AeLBdBo</recordid><startdate>20130920</startdate><enddate>20130920</enddate><creator>Tupa, Peter R</creator><creator>DeLeo, Gary G</creator><creator>McCluskey, George E</creator><creator>Kondo, Yoji</creator><creator>Sahade, Jorge</creator><creator>Gimenez, Alvaro</creator><creator>Caton, Daniel B</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><scope>OTOTI</scope></search><sort><creationdate>20130920</creationdate><title>ULTRAVIOLET SPECTROSCOPIC ANALYSIS OF TRANSIENT MASS FLOW OUTBURST IN U CEPHEI</title><author>Tupa, Peter R ; DeLeo, Gary G ; McCluskey, George E ; Kondo, Yoji ; Sahade, Jorge ; Gimenez, Alvaro ; Caton, Daniel B</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c385t-19800895bedb5346360bdda42462b7a2e92c5ef90820a5ccb9ae4552224965c83</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>APPROXIMATIONS</topic><topic>ASTROPHYSICS</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>Atmospherics</topic><topic>CEPHEIDS</topic><topic>COMPUTERIZED SIMULATION</topic><topic>Density</topic><topic>ECLIPSE</topic><topic>Mass flow</topic><topic>MASS TRANSFER</topic><topic>Orbitals</topic><topic>PHOTOSPHERE</topic><topic>RADIAL VELOCITY</topic><topic>S CODES</topic><topic>Spectra</topic><topic>STAR ACCRETION</topic><topic>T CODES</topic><topic>TRANSIENTS</topic><topic>Ultraviolet</topic><topic>ULTRAVIOLET RADIATION</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tupa, Peter R</creatorcontrib><creatorcontrib>DeLeo, Gary G</creatorcontrib><creatorcontrib>McCluskey, George E</creatorcontrib><creatorcontrib>Kondo, Yoji</creatorcontrib><creatorcontrib>Sahade, Jorge</creatorcontrib><creatorcontrib>Gimenez, Alvaro</creatorcontrib><creatorcontrib>Caton, Daniel B</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tupa, Peter R</au><au>DeLeo, Gary G</au><au>McCluskey, George E</au><au>Kondo, Yoji</au><au>Sahade, Jorge</au><au>Gimenez, Alvaro</au><au>Caton, Daniel B</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>ULTRAVIOLET SPECTROSCOPIC ANALYSIS OF TRANSIENT MASS FLOW OUTBURST IN U CEPHEI</atitle><jtitle>The Astrophysical journal</jtitle><date>2013-09-20</date><risdate>2013</risdate><volume>775</volume><issue>1</issue><spage>1</spage><epage>21</epage><pages>1-21</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><abstract>Spectra from the International Ultraviolet Explorer taken in 1989 September over one full orbital period of U Cephei (U Cep, HD 5796) are analyzed. The TLUSTY and SYNSPEC stellar atmospheric simulation programs are used to generate synthetic spectra to which U Cep continuum levels are normalized. Absorption lines attributed to the photosphere are divided out to isolate mass flow and accretion spectra. A radial velocity curve is constructed for conspicuous gas stream features, and shows evidence for a transient flow during secondary eclipse with outward velocities ranging between 200 and 350 km s super(-1), and a number density of (3 + or - 2) x 10 super(10) cm super(-3). The validity of C iv 1548 and 1550 and Si iv 1393 and 1402 lines are re-examined in the context of extreme rotational blending effects. A G-star to B-star mass transfer rate of (5 + or - 4) x 10 super(-9).</abstract><cop>United States</cop><doi>10.1088/0004-637X/775/1/46</doi><tpages>21</tpages><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-637X |
| ispartof | The Astrophysical journal, 2013-09, Vol.775 (1), p.1-21 |
| issn | 0004-637X 1538-4357 |
| language | eng |
| recordid | cdi_osti_scitechconnect_22270933 |
| source | EZB-FREE-00999 freely available EZB journals; Institute of Physics Open Access Journal Titles; Alma/SFX Local Collection |
| subjects | APPROXIMATIONS ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Atmospherics CEPHEIDS COMPUTERIZED SIMULATION Density ECLIPSE Mass flow MASS TRANSFER Orbitals PHOTOSPHERE RADIAL VELOCITY S CODES Spectra STAR ACCRETION T CODES TRANSIENTS Ultraviolet ULTRAVIOLET RADIATION |
| title | ULTRAVIOLET SPECTROSCOPIC ANALYSIS OF TRANSIENT MASS FLOW OUTBURST IN U CEPHEI |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-02-01T13%3A40%3A23IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_osti_&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=ULTRAVIOLET%20SPECTROSCOPIC%20ANALYSIS%20OF%20TRANSIENT%20MASS%20FLOW%20OUTBURST%20IN%20U%20CEPHEI&rft.jtitle=The%20Astrophysical%20journal&rft.au=Tupa,%20Peter%20R&rft.date=2013-09-20&rft.volume=775&rft.issue=1&rft.spage=1&rft.epage=21&rft.pages=1-21&rft.issn=0004-637X&rft.eissn=1538-4357&rft_id=info:doi/10.1088/0004-637X/775/1/46&rft_dat=%3Cproquest_osti_%3E1705083214%3C/proquest_osti_%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1705083214&rft_id=info:pmid/&rfr_iscdi=true |