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Quantifying the Impact of Relativistic Precession on Tidal Disruption Event Light Curves
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Number of Authors: 52026 (English)In: Astronomical Notes - Astronomische Nachrichten, ISSN 0004-6337, E-ISSN 1521-3994Article in journal (Refereed) Epub ahead of print
Abstract [en]

The tidal field of a black hole can turn a star into a gas stream whose orbit can precess, especially if the a black hole is rapidly spinning. In this work, we investigate the impact of precession on the light curves of tidal disruption events (TDE). To do so, we perform two-dimensional radiation-hydrodynamic simulations of the interaction of the TDE wind and luminosity with the precessed stream wrapped around the black hole. Our results show that in events with black holes of ∼ 106 M and no orbit-spin inclination, the line of sight has little effect on the light curves, since the stream covers a small fraction of the solid angle as the precession is confined to the orbital plane. In the case of black holes of ≳ 107 M and high inclination (𝑖 ∼ 90˚), the light curve peaks can be delayed by ∼100 days due to presence of the precessed stream blocking the radiation in the early phase of the event. We also discuss our efforts to model self-consistently the hydrodynamic evolution of a tidal stellar stream on curved spacetimes by the presence of a massive black hole.

Place, publisher, year, edition, pages
2026.
Keywords [en]
methods: numerical, radiation: dynamics, radiative transfer, transients: tidal disruption events
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-253992DOI: 10.1002/asna.70092ISI: 001710342300001Scopus ID: 2-s2.0-105032788441OAI: oai:DiVA.org:su-253992DiVA, id: diva2:2051128
Available from: 2026-04-07 Created: 2026-04-07 Last updated: 2026-04-07

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Rosswog, Stephan

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Department of AstronomyThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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Astronomical Notes - Astronomische Nachrichten
Astronomy, Astrophysics and Cosmology

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