| Autor: |
Luca Broggi, Nicholas C. Stone, Taeho Ryu, Elisa Bortolas, Massimo Dotti, Matteo Bonetti, Alberto Sesana |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
The Open Journal of Astrophysics, Vol 7 (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2565-6120 |
| DOI: |
10.33232/001c.120086 |
| Popis: |
Two-body relaxation may drive stars onto near-radial orbits around a massive black hole, resulting in a tidal disruption event (TDE). In some circumstances, stars are unlikely to undergo a single terminal disruption, but rather to have a sequence of many grazing encounters with the black hole. It has long been unclear what is the physical outcome of this sequence: each of these encounters can only liberate a small amount of stellar mass, but may significantly alter the orbit of the star. We study the phenomenon of repeating partial tidal disruptions (pTDEs) by building a semi-analytical model that accounts for mass loss and tidal excitations. In the empty loss cone regime, where two-body relaxation is weak, we estimate the number of consecutive partial disruption that a star can undergo, on average, before being significantly affected by two-body encounters. We find that in this empty loss cone regime, a star will be destroyed in a sequence of weak pTDEs, possibly explaining the tension between the low observed TDE rate and its higher theoretical estimates. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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