V432 Per, a close binary star in poor thermal contact
In a program instigated to understand close, possibly contact binary stars which appear to be in poor thermal contact, we have re-observed V432 Per both photometrically and spectroscopically. We conclude that the mass ratio is likely in the range q= 0.30–0.38, and the system clearly has a transit pr...
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| Veröffentlicht in: | Monthly notices of the Royal Astronomical Society 2009-12, Vol.400 (4), p.2085-2089 |
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| container_issue | 4 |
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| container_title | Monthly notices of the Royal Astronomical Society |
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| creator | Odell, Andrew P. Eaton, Joel A. López-Cruz, Omar |
| description | In a program instigated to understand close, possibly contact binary stars which appear to be in poor thermal contact, we have re-observed V432 Per both photometrically and spectroscopically. We conclude that the mass ratio is likely in the range q= 0.30–0.38, and the system clearly has a transit primary eclipse. The face of the less massive secondary towards the primary seems to be significantly hotter than expected. It was hoped that spectral line profiles would allow determination of this spot's radius (rspot), but the low mass of the secondary precluded this. With the existing observations, it is impossible to say whether this system is a true contact binary (rspot 30°–90°), is semidetached (rspot 90°–120°) or is marginally detached (rspot 120°–150°). However, while it may be marginally in physical contact, it is clearly in poor thermal contact. With its short period and marginal contact, this system merits further attention as a potential transitional species in binary-star evolution. |
| doi_str_mv | 10.1111/j.1365-2966.2009.15600.x |
| format | Article |
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With its short period and marginal contact, this system merits further attention as a potential transitional species in binary-star evolution.</description><subject>Astronomy</subject><subject>binaries: close</subject><subject>Double stars</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Spectrum analysis</subject><subject>stars: binaries: eclipsing</subject><subject>stars: individual: V432 Per</subject><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNqFkU9rFEEQxRtRcI35Do2gJ2es_t99ETSoEaKJEkW8NDW9PTjr7MymexY33z492bAHJViXKqjfe1D1CKEMalbq1apmQquKO61rDuBqpjRAvXtAFofFQ7IAEKqyhrHH5EnOKwCQgusFUd9LpxcxvaRIQz_mSJtuwHRN84SJdgPdjGOi06-Y1tjTMA4ThukpedRin-PxXT8i396_uzw5rc7OP3w8eXNWBcU0VNygbpfRSgnKoGqWTiJKbF0TnLM6KGDAbVBLvsTWBCcbDZypYJ1pZGtQHJEXe99NGq-2MU9-3eUQ-x6HOG6zF1oyY536L8gZd0IzVsBnf4GrcZuGcoTnYIQEZ2e353cQ5oB9m3AIXfab1K3LZzwvVU6yhXu95_50fbw-7Bn4ORq_8nMCfk7Az9H422j8zn_6_PV2LAZibzBuN_fIq3_kRVXtVV2e4u6gw_TbayOM8qc_fnr79ssFcKH9pbgBF2-evQ</recordid><startdate>20091221</startdate><enddate>20091221</enddate><creator>Odell, Andrew P.</creator><creator>Eaton, Joel A.</creator><creator>López-Cruz, Omar</creator><general>Blackwell Publishing Ltd</general><general>Wiley-Blackwell</general><general>Oxford University Press</general><scope>BSCLL</scope><scope>IQODW</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>20091221</creationdate><title>V432 Per, a close binary star in poor thermal contact</title><author>Odell, Andrew P. ; Eaton, Joel A. ; López-Cruz, Omar</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5160-27a6fde844057a5bd94aa4af9bc9986c501028c5d2daf7c94b60215c897b4f7a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><topic>Astronomy</topic><topic>binaries: close</topic><topic>Double stars</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>Spectrum analysis</topic><topic>stars: binaries: eclipsing</topic><topic>stars: individual: V432 Per</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Odell, Andrew P.</creatorcontrib><creatorcontrib>Eaton, Joel A.</creatorcontrib><creatorcontrib>López-Cruz, Omar</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Odell, Andrew P.</au><au>Eaton, Joel A.</au><au>López-Cruz, Omar</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>V432 Per, a close binary star in poor thermal contact</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><stitle>Monthly Notices of the Royal Astronomical Society</stitle><addtitle>Monthly Notices of the Royal Astronomical Society</addtitle><date>2009-12-21</date><risdate>2009</risdate><volume>400</volume><issue>4</issue><spage>2085</spage><epage>2089</epage><pages>2085-2089</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><coden>MNRAA4</coden><abstract>In a program instigated to understand close, possibly contact binary stars which appear to be in poor thermal contact, we have re-observed V432 Per both photometrically and spectroscopically. We conclude that the mass ratio is likely in the range q= 0.30–0.38, and the system clearly has a transit primary eclipse. The face of the less massive secondary towards the primary seems to be significantly hotter than expected. It was hoped that spectral line profiles would allow determination of this spot's radius (rspot), but the low mass of the secondary precluded this. With the existing observations, it is impossible to say whether this system is a true contact binary (rspot 30°–90°), is semidetached (rspot 90°–120°) or is marginally detached (rspot 120°–150°). However, while it may be marginally in physical contact, it is clearly in poor thermal contact. With its short period and marginal contact, this system merits further attention as a potential transitional species in binary-star evolution.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1111/j.1365-2966.2009.15600.x</doi><tpages>5</tpages><oa>free_for_read</oa></addata></record> |
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| source | Access via Wiley Online Library; Oxford Journals Open Access Collection |
| subjects | Astronomy binaries: close Double stars Earth, ocean, space Exact sciences and technology Spectrum analysis stars: binaries: eclipsing stars: individual: V432 Per |
| title | V432 Per, a close binary star in poor thermal contact |
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