Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700)
Several post-common envelope binaries have slightly increasing, decreasing or oscillating orbital periods. One of several possible explanations is light travel-time changes, caused by the binary centre-of-mass being perturbed by the gravitational pull of a third body. Further studies are necessary b...
| Main Authors: | , , |
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| Format: | Journal article |
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De Gruyter
2017
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| _version_ | 1826259353829638144 |
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| author | Bogensberger, D Clarke, F Lynas-Gray, A |
| author_facet | Bogensberger, D Clarke, F Lynas-Gray, A |
| author_sort | Bogensberger, D |
| collection | OXFORD |
| description | Several post-common envelope binaries have slightly increasing, decreasing or oscillating orbital periods. One of several possible explanations is light travel-time changes, caused by the binary centre-of-mass being perturbed by the gravitational pull of a third body. Further studies are necessary because it is not clear how a third body could have survived subdwarf progenitor mass-loss at the tip of the Red Giant Branch, or formed subsequently. Thirty-nine primary eclipse times for V470 Cam were secured with the Philip Wetton Telescope during the period 2016 November 25thto 2017 January 27th. Available eclipse timings suggest a brown dwarf tertiary having a mass of at least 0.0236(40) M, an elliptical orbit with an eccentricity of 0.376(98) and an orbital period of 11.77(67) years about the binary centre-of-mass. The mass and orbit suggest a hybrid formation, in which some ejected material from the subdwarf progenitor was accreted on to a precursor tertiary component, although additional observations would be needed to confirm this interpretation and investigate other possible origins for the binary orbital period change. |
| first_indexed | 2024-03-06T18:48:31Z |
| format | Journal article |
| id | oxford-uuid:0f5e0aca-64ab-4986-838e-cd399d7c7072 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T18:48:31Z |
| publishDate | 2017 |
| publisher | De Gruyter |
| record_format | dspace |
| spelling | oxford-uuid:0f5e0aca-64ab-4986-838e-cd399d7c70722022-03-26T09:50:58ZFurther evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0f5e0aca-64ab-4986-838e-cd399d7c7072Symplectic Elements at OxfordDe Gruyter2017Bogensberger, DClarke, FLynas-Gray, ASeveral post-common envelope binaries have slightly increasing, decreasing or oscillating orbital periods. One of several possible explanations is light travel-time changes, caused by the binary centre-of-mass being perturbed by the gravitational pull of a third body. Further studies are necessary because it is not clear how a third body could have survived subdwarf progenitor mass-loss at the tip of the Red Giant Branch, or formed subsequently. Thirty-nine primary eclipse times for V470 Cam were secured with the Philip Wetton Telescope during the period 2016 November 25thto 2017 January 27th. Available eclipse timings suggest a brown dwarf tertiary having a mass of at least 0.0236(40) M, an elliptical orbit with an eccentricity of 0.376(98) and an orbital period of 11.77(67) years about the binary centre-of-mass. The mass and orbit suggest a hybrid formation, in which some ejected material from the subdwarf progenitor was accreted on to a precursor tertiary component, although additional observations would be needed to confirm this interpretation and investigate other possible origins for the binary orbital period change. |
| spellingShingle | Bogensberger, D Clarke, F Lynas-Gray, A Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700) |
| title | Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700) |
| title_full | Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700) |
| title_fullStr | Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700) |
| title_full_unstemmed | Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700) |
| title_short | Further evidence of a brown dwarf orbiting the post-common envelope eclipsing binary V470 cam (HS 0705+6700) |
| title_sort | further evidence of a brown dwarf orbiting the post common envelope eclipsing binary v470 cam hs 0705 6700 |
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