The slow merger of massive stars: Merger types and post-merger evolution
We study the slow merger of two massive stars inside a common envelope: The initial close binary system consists of a massive red supergiant and a main-sequence companion of a few solar, masses. The merger product is a massive supergiant with an interior structure (core mass and composition profile)...
| Main Authors: | , |
|---|---|
| Format: | Conference item |
| Published: |
2002
|
| _version_ | 1826265237422080000 |
|---|---|
| author | Ivanova, N Podsiadlowski, P |
| author_facet | Ivanova, N Podsiadlowski, P |
| author_sort | Ivanova, N |
| collection | OXFORD |
| description | We study the slow merger of two massive stars inside a common envelope: The initial close binary system consists of a massive red supergiant and a main-sequence companion of a few solar, masses. The merger product is a massive supergiant with an interior structure (core mass and composition profile) which is significantly different from that of a single supergiant that has evolved in isolation: Using a parameterized approach for the stream-core interaction, we modelled the merger phase and have identified three qualitatively different merger types: quiet, moderate and explosive mergers, where the differences are caused by the different response of the He burning shell. In the last two scenarios, the post-merger He abundance in the envelope is found to be substantially increased, but significant s-processing is mainly expected in the case of an explosive merger scenario. The subsequent evolution of the merger product up to the supernova stage is also discussed. |
| first_indexed | 2024-03-06T20:20:31Z |
| format | Conference item |
| id | oxford-uuid:2da2a822-2204-4d88-a158-629602b8211e |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:20:31Z |
| publishDate | 2002 |
| record_format | dspace |
| spelling | oxford-uuid:2da2a822-2204-4d88-a158-629602b8211e2022-03-26T12:44:10ZThe slow merger of massive stars: Merger types and post-merger evolutionConference itemhttp://purl.org/coar/resource_type/c_5794uuid:2da2a822-2204-4d88-a158-629602b8211eSymplectic Elements at Oxford2002Ivanova, NPodsiadlowski, PWe study the slow merger of two massive stars inside a common envelope: The initial close binary system consists of a massive red supergiant and a main-sequence companion of a few solar, masses. The merger product is a massive supergiant with an interior structure (core mass and composition profile) which is significantly different from that of a single supergiant that has evolved in isolation: Using a parameterized approach for the stream-core interaction, we modelled the merger phase and have identified three qualitatively different merger types: quiet, moderate and explosive mergers, where the differences are caused by the different response of the He burning shell. In the last two scenarios, the post-merger He abundance in the envelope is found to be substantially increased, but significant s-processing is mainly expected in the case of an explosive merger scenario. The subsequent evolution of the merger product up to the supernova stage is also discussed. |
| spellingShingle | Ivanova, N Podsiadlowski, P The slow merger of massive stars: Merger types and post-merger evolution |
| title | The slow merger of massive stars: Merger types and post-merger evolution |
| title_full | The slow merger of massive stars: Merger types and post-merger evolution |
| title_fullStr | The slow merger of massive stars: Merger types and post-merger evolution |
| title_full_unstemmed | The slow merger of massive stars: Merger types and post-merger evolution |
| title_short | The slow merger of massive stars: Merger types and post-merger evolution |
| title_sort | slow merger of massive stars merger types and post merger evolution |
| work_keys_str_mv | AT ivanovan theslowmergerofmassivestarsmergertypesandpostmergerevolution AT podsiadlowskip theslowmergerofmassivestarsmergertypesandpostmergerevolution AT ivanovan slowmergerofmassivestarsmergertypesandpostmergerevolution AT podsiadlowskip slowmergerofmassivestarsmergertypesandpostmergerevolution |