Fate of the remnant in tidal stripping event: repeating and non-repeating

Abstract

Tidal disruption events (TDE) occur when a star ventures too close to a massive black hole. In a partial TDE (pTDE), the star only grazes the tidal radius, causing the outer envelope of the star to be stripped away while the stellar core survives. Previous research has shown that a star, once tidally stripped in a parabolic orbit, can acquire enough orbital energy for its remnant to become a high-velocity star potentially capable of escaping the galaxy. Conversely, some studies have reported that the remnant may lose orbital energy and undergo re-disruption, leading to a recurring pTDE. This study aims to uncover the physical mechanisms and determine the conditions that lead to these divergent outcomes. We find that the orbital energy change only depends on the impact factor and the stellar structure, and barely depends on the mass of the black hole or the exact mass or orbital eccentricity of the star. For a $\gamma =5/3$ (or $\gamma =4/3$) polytropic star, after a pTDE its remnant gains orbital energy when the impact factor $\beta \gtrsim 0.62$ (or $\gtrsim 1.1$) or loses energy vice versa. Additionally, we verify an analytical equation for orbital energy change that is applicable across various systems. Through hydrodynamic simulations, we also explore the structure of the stellar remnant post-tidal stripping. Our findings provide critical insights for interpreting observed pTDEs and advancing knowledge on the orbital evolution and event rate of these events.

arXiv comment20 pages, 16 figures, 2 tables, accepted by ApJ

References in corpus (65)

• Coevolution (Or Not) of Supermassive Black Holes and Host Galaxies
• Intermediate-Mass Black Holes
• The runaway growth of intermediate-mass black holes in dense star clusters
• Hydrodynamical Simulations to Determine the Feeding Rate of Black Holes by the Tidal Disruption of Stars: The Importance of the Impact Parameter and Stellar Structure
• GYRE: An open-source stellar oscillation code based on a new Magnus Multiple Shooting Scheme
• Optical Flares from the Tidal Disruption of Stars by Massive Black Holes
• Production of Intermediate-Mass Black Holes in Globular Clusters
• Tidal Disruption Events
• Rates of Stellar Tidal Disruption as Probes of the Supermassive Black Hole Mass Function
• Revised Rates of Stellar Disruption in Galactic Nuclei
• A unified model for tidal disruption events
• Multiband lightcurves of tidal disruption events
• Nine-hour X-ray quasi-periodic eruptions from a low-mass black hole galactic nucleus
• A Bright Year for Tidal Disruptions?
• Large-Amplitude X-ray Outbursts from Galactic Nuclei: A Systematic Survey Using ROSAT Archival Data
• X-ray Quasi-Periodic Eruptions from two previously quiescent galaxies
• Consequences of Strong Compression in Tidal Disruption Events
• Finite, Intense Accretion Bursts from Tidal Disruption of Stars on Bound Orbits
• X-ray quasi-periodic eruptions from the galactic nucleus of RX J1301.9+2747
• Consequences of the Ejection and Disruption of Giant Planets
• Self-intersection of the Fallback Stream in Tidal Disruption Events
• iPTF16fnl: a faint and fast tidal disruption event in an E+A galaxy
• Prompt Radiation and Mass Outflows from the Stream-Stream Collisions of Tidal Disruption Events
• Measurement of the rate of stellar tidal disruption flares
• Equipotential Surfaces and Lagrangian points in Non-synchronous, Eccentric Binary and Planetary Systems
• An outflow powers the optical rise of the nearby, fast-evolving tidal disruption event AT2019qiz
• ASASSN-14ko is a Periodic Nuclear Transient in ESO 253-G003
• Partial Stellar Disruption by a Supermassive Black Hole: Is the Lightcurve Really Proportional to $t^{-9/4}$?
• Discovery of a new kind of explosive X-ray transient near M86
• Illuminating Massive Black Holes With White Dwarfs: Orbital Dynamics and High Energy Transients from Tidal Interactions
• Quasi-periodic eruptions from mildly eccentric unstable mass transfer in galactic nuclei
• Tidal disruptions of main sequence stars -- III. Stellar mass dependence of the character of partial disruptions
• Spoon-Feeding Giant Stars to Supermassive Black Holes: Episodic Mass Transfer from Evolving Stars and Their Contribution to the Quiescent Activity of Galactic Nuclei
• Live to die another day: the rebrightening of AT2018fyk as a repeating partial tidal disruption event
• Quasi--Periodic Eruptions from Galaxy Nuclei
• The fine line between total and partial tidal disruption events
• A population of dust-enshrouded objects orbiting the Galactic black hole
• Deciphering the extreme X-ray variability of the nuclear transient eRASSt J045650.3-203750: A likely repeating partial tidal disruption event
• Quasi-periodic Eruptions from Helium Envelope of Hydrogen-deficient Stars Stripped by Supermassive Black Holes
• Tidal disruption events: the role of stellar spin
• On the Diversity of Fallback Rates from Tidal Disruption Events with Accurate Stellar Structure
• Tidal disruptions of main sequence stars -- II. Simulation methodology and stellar mass dependence of the character of full tidal disruptions
• Turbovelocity Stars: Kicks Resulting From the Tidal Disruption of Solitary Stars
• Relativistic effects on tidal disruption kicks of solitary stars
• The Tidal Disruption Event AT 2018hyz II: Light Curve Modeling of a Partially Disrupted Star
• Ultraluminous X-ray bursts in two ultracompact companions to nearby elliptical galaxies
• A model for the possible connection between tidal disruption event and quasi-periodic eruption in GSN 069
• The rebrightening of a ROSAT-selected tidal disruption event: repeated weak partial disruption flares from a quiescent galaxy?
• Enhancement of the tidal disruption event rate in galaxies with a nuclear star cluster: from dwarfs to ellipticals
• Period Evolution of Repeating Transients in Galactic Nuclei
• The Rapid X-ray and UV Evolution of ASASSN-14ko
• The unluckiest star: A spectroscopically confirmed repeated partial tidal disruption event AT 2022dbl
• Luminous X-ray Flares from Low Mass X-ray Binary Candidates in the Early-Type Galaxy NGC 4697
• Tidal Stripping of a White Dwarf by an Intermediate-Mass Black Hole
• Fast, ultra-luminous X-ray bursts from tidal stripping of White Dwarfs by Intermediate-mass Black Holes
• Chandra, HST/STIS, NICER, Swift, and TESS Detail the Flare Evolution of the Repeating Nuclear Transient ASASSN-14ko
• Rapid evolution of the recurrence time in the repeating partial tidal disruption event eRASSt J045650.3-203750
• Tidal disruption events from eccentric orbits and lessons learned from the noteworthy ASASSN-14ko
• Partial Tidal Disruption of Main-Sequence Stars by Intermediate-Mass Black Holes
• Light Curves of Partial Tidal Disruption Events
• Partial stellar tidal disruption events and their rates
• Forward Modeling Populations of Flares from Tidal Disruptions of Stars by Super-massive Black Holes
• Adiabatic Evolution of Mass-losing Stars
• Repeating partial disruptions and two-body relaxation
• A new X-ray tidal disruption event candidate with fast variability

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