Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-28T16:12:22.713Z Has data issue: false hasContentIssue false

The role of stellar rotation in Tidal Disruption Events

Published online by Cambridge University Press:  07 April 2020

Andrea Sacchi
Affiliation:
Dipartimento di Fisica, Università degli Studi di Pavia, Via Bassi 6, Pavia, Italy email: [email protected]
Giuseppe Lodato
Affiliation:
Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, Milan, Italy email: [email protected]
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Tidal Disruption Events (TDEs) are highly variable high energy phenomena originating from Galactic Nuclei (Komossa & Bade 1999). TDEs are thus powerful tools to study quiescent Galactic Nuclei given their extreme brightness (several times super-Eddington) and the possibility of being seen in non-AGN galaxies. A TDE is the violent disruption of a star passing by a Super Massive Black Hole (SMBH); after the disruption, roughly half of the star mass gains enough energy to escape from the Black Hole, while the other half is bound to the Hole, falls back and eventually accretes onto it. Early works, (Rees 1988), pointed out a t−5/3 behaviour for the light curves of this event and since then such a time dependency became the signature of these events. Strong deviations are however introduced when one considers the internal stellar structure or if one considers partial disruptions. One feature that has never been taken into account is the effect of stellar rotation in the resulting fallback rate, which is the aim of the present work. Firstly, we will show analytical estimates of the impact of stellar rotation on the TDE and we will then present a set of Smoothed Particle Hydrodynamic simulations of the tidal disruption of rotating stars, performed in order to test these analytical estimates.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

References

Komossa, S., Bade, N., 1999, A&A, 343, 775Google Scholar
Price, D. J., et al., 2017, preprint, (arXiv:1702.03930)Google Scholar
Rees, M. J., 1988, Nature, 333, 523CrossRefGoogle Scholar