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On the Diversity of Fallback Rates from Tidal Disruption Events with Accurate Stellar Structure

  • Authors: E. C. A. Golightly, C. J. Nixon, and E. R. Coughlin

2019 The Astrophysical Journal Letters 882 L26.

  • Provider: AAS Journals

Caption: Figure 6.

Fallback rate from the 1 M, TAMS progenitor (left panel) and the 0.3 M, TAMS progenitor (right panel), where the solid curves are for the MESA-generated density profile and dashed (dotted–dashed) curves are from γ = 5/3 (γ = 1.35) polytropes matched to the MESA star mass and radius. In each case the MESA density profile yields a bound core that survives the encounter, while the polytropes do not; this results in a late-time power-law falloff that declines approximately as t−9/4 (dotted–dotted–dashed line) and is significantly steeper than t−5/3 (dotted line). The Eddington luminosity of the BH, assuming a radiative efficiency of 10% and an electron-scattering-dominated opacity of 0.34 cm2 g−1, is shown by the long-dashed black line.

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