Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation
The physical collisions of two white dwarfs (WDs; i.e., not slow mergers) have been shown to produce Type Ia–like supernova (SN) explosions. Most studies of WD collisions have focused on zero impact-parameter (direct) collisions, which can also be studied in 2D. However, the vast majority of WD coll...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/ade146 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1839619275410636800 |
|---|---|
| author | Hila Glanz Hagai B. Perets Ruediger Pakmor |
| author_facet | Hila Glanz Hagai B. Perets Ruediger Pakmor |
| author_sort | Hila Glanz |
| collection | DOAJ |
| description | The physical collisions of two white dwarfs (WDs; i.e., not slow mergers) have been shown to produce Type Ia–like supernova (SN) explosions. Most studies of WD collisions have focused on zero impact-parameter (direct) collisions, which can also be studied in 2D. However, the vast majority of WD collisions arising from any evolutionary channel suggested to date are expected to be indirect, i.e., have a nonnegligible impact parameter upon collision. Here, we use one of the highest-resolution 3D simulations to date (making use of the AREPO code) in order to explore both direct and indirect collisions and the conditions in which they give rise to a detonation and the production of a luminous SN. Using our simulations, we find a detonation criterion that can provide the critical impact parameter for an explosion to occur, depending on the density profile of the colliding WDs, their composition, and their collision velocities. We find that the initial velocity has a significant impact on the amount of ^56 Ni production from the explosion. Furthermore, the production of the ^56 Ni also depends on numerical modeling aspects. |
| format | Article |
| id | doaj-art-1bf811f3a96e45ae91f4d37b0fdd2cae |
| institution | Matheson Library |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-1bf811f3a96e45ae91f4d37b0fdd2cae2025-07-23T11:27:06ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01988218410.3847/1538-4357/ade146Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for DetonationHila Glanz0https://orcid.org/0000-0002-6012-2136Hagai B. Perets1https://orcid.org/0000-0002-5004-199XRuediger Pakmor2https://orcid.org/0000-0003-3308-2420Technion—Israel Institute of Technology , Haifa 3200002, Israel ; glanz@campus.technion.ac.ilTechnion—Israel Institute of Technology , Haifa 3200002, Israel ; glanz@campus.technion.ac.ilMax-Planck-Institut für Astrophysik , Karl-Schwarzschild-Str. 1, D-85748 Garching, GermanyThe physical collisions of two white dwarfs (WDs; i.e., not slow mergers) have been shown to produce Type Ia–like supernova (SN) explosions. Most studies of WD collisions have focused on zero impact-parameter (direct) collisions, which can also be studied in 2D. However, the vast majority of WD collisions arising from any evolutionary channel suggested to date are expected to be indirect, i.e., have a nonnegligible impact parameter upon collision. Here, we use one of the highest-resolution 3D simulations to date (making use of the AREPO code) in order to explore both direct and indirect collisions and the conditions in which they give rise to a detonation and the production of a luminous SN. Using our simulations, we find a detonation criterion that can provide the critical impact parameter for an explosion to occur, depending on the density profile of the colliding WDs, their composition, and their collision velocities. We find that the initial velocity has a significant impact on the amount of ^56 Ni production from the explosion. Furthermore, the production of the ^56 Ni also depends on numerical modeling aspects.https://doi.org/10.3847/1538-4357/ade146Type Ia supernovaeSupernova dynamicsBinary starsShocksNuclear astrophysicsExplosive nucleosynthesis |
| spellingShingle | Hila Glanz Hagai B. Perets Ruediger Pakmor Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation The Astrophysical Journal Type Ia supernovae Supernova dynamics Binary stars Shocks Nuclear astrophysics Explosive nucleosynthesis |
| title | Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation |
| title_full | Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation |
| title_fullStr | Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation |
| title_full_unstemmed | Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation |
| title_short | Thermonuclear Supernova Explosion Criteria for Direct and Indirect Collisions of CO White Dwarfs: A Study of the Impact-parameter Threshold for Detonation |
| title_sort | thermonuclear supernova explosion criteria for direct and indirect collisions of co white dwarfs a study of the impact parameter threshold for detonation |
| topic | Type Ia supernovae Supernova dynamics Binary stars Shocks Nuclear astrophysics Explosive nucleosynthesis |
| url | https://doi.org/10.3847/1538-4357/ade146 |
| work_keys_str_mv | AT hilaglanz thermonuclearsupernovaexplosioncriteriafordirectandindirectcollisionsofcowhitedwarfsastudyoftheimpactparameterthresholdfordetonation AT hagaibperets thermonuclearsupernovaexplosioncriteriafordirectandindirectcollisionsofcowhitedwarfsastudyoftheimpactparameterthresholdfordetonation AT ruedigerpakmor thermonuclearsupernovaexplosioncriteriafordirectandindirectcollisionsofcowhitedwarfsastudyoftheimpactparameterthresholdfordetonation |