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A model for the 89 Herculis system
We report new radial velocity measurements of the F2 supergiant 89 Her that confirm the binary nature of this star. A period search yields an orbital period of 288.4 +/- 0.7 days, in close agreement with earlier results. We also present intermediate resolution spectra in the wavelength range 3500 -...
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| Published in: | Astronomy and astrophysics (Berlin) 1993-03, Vol.269 (1-2), p.242-248 |
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| Main Authors: | , , , |
| Format: | Article |
| Language: | English |
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| container_end_page | 248 |
| container_issue | 1-2 |
| container_start_page | 242 |
| container_title | Astronomy and astrophysics (Berlin) |
| container_volume | 269 |
| creator | WATERS, L. B. F. M WAELKENS, C MAYOR, M TRAMS, N. R |
| description | We report new radial velocity measurements of the F2 supergiant 89 Her that confirm the binary nature of this star. A period search yields an orbital period of 288.4 +/- 0.7 days, in close agreement with earlier results. We also present intermediate resolution spectra in the wavelength range 3500 - 11,000 A, with numerous emission lines. We use the available spectroscopic and photometric data to construct a qualitative model for the circumstellar envelope of 89 Her, and suggest that it is highly nonspherical as a result of binary evolution. We discuss the evolutionary status of the 89 Her system. |
| format | article |
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B. F. M</creatorcontrib><creatorcontrib>WAELKENS, C</creatorcontrib><creatorcontrib>MAYOR, M</creatorcontrib><creatorcontrib>TRAMS, N. R</creatorcontrib><title>A model for the 89 Herculis system</title><title>Astronomy and astrophysics (Berlin)</title><description>We report new radial velocity measurements of the F2 supergiant 89 Her that confirm the binary nature of this star. A period search yields an orbital period of 288.4 +/- 0.7 days, in close agreement with earlier results. We also present intermediate resolution spectra in the wavelength range 3500 - 11,000 A, with numerous emission lines. We use the available spectroscopic and photometric data to construct a qualitative model for the circumstellar envelope of 89 Her, and suggest that it is highly nonspherical as a result of binary evolution. We discuss the evolutionary status of the 89 Her system.</description><subject>Astronomy</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Normal stars (by class): general or individual</subject><subject>Stars</subject><subject>Supergiant stars</subject><issn>0004-6361</issn><issn>1432-0746</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1993</creationdate><recordtype>article</recordtype><recordid>eNotjUFLxDAUhIMoWFf_QxDxFkjy0uT1uCzqLix40XPJZhOspNua1x7231tx5zIM8zFzxSplQAvpjL1mlZTSCAtW3bI7ou8laoVQscc174djzDwNhU9fkWPDt7GEOXfE6UxT7O_ZTfKZ4sPFV-zz9eVjsxX797fdZr0XozL1JDDEGlMyFhobVYDlHYN1RluEgzmoRc40UkZcGgCnaqelTEeDKFOCGlbs-X93LMPPHGlq-45CzNmf4jBTq61EXTd_4NMF9BR8TsWfQkftWLrel3NrrEPABn4B-upGRA</recordid><startdate>19930301</startdate><enddate>19930301</enddate><creator>WATERS, L. B. F. M</creator><creator>WAELKENS, C</creator><creator>MAYOR, M</creator><creator>TRAMS, N. 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M</creatorcontrib><creatorcontrib>WAELKENS, C</creatorcontrib><creatorcontrib>MAYOR, M</creatorcontrib><creatorcontrib>TRAMS, N. R</creatorcontrib><collection>Pascal-Francis</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>WATERS, L. B. F. M</au><au>WAELKENS, C</au><au>MAYOR, M</au><au>TRAMS, N. R</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A model for the 89 Herculis system</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>1993-03-01</date><risdate>1993</risdate><volume>269</volume><issue>1-2</issue><spage>242</spage><epage>248</epage><pages>242-248</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><coden>AAEJAF</coden><abstract>We report new radial velocity measurements of the F2 supergiant 89 Her that confirm the binary nature of this star. A period search yields an orbital period of 288.4 +/- 0.7 days, in close agreement with earlier results. We also present intermediate resolution spectra in the wavelength range 3500 - 11,000 A, with numerous emission lines. We use the available spectroscopic and photometric data to construct a qualitative model for the circumstellar envelope of 89 Her, and suggest that it is highly nonspherical as a result of binary evolution. We discuss the evolutionary status of the 89 Her system.</abstract><cop>Les Ulis</cop><pub>EDP Sciences</pub><tpages>7</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0004-6361 |
| ispartof | Astronomy and astrophysics (Berlin), 1993-03, Vol.269 (1-2), p.242-248 |
| issn | 0004-6361 1432-0746 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_26082595 |
| source | EZB Electronic Journals Library |
| subjects | Astronomy Earth, ocean, space Exact sciences and technology Normal stars (by class): general or individual Stars Supergiant stars |
| title | A model for the 89 Herculis system |
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