2023
DOI: 10.3847/2041-8213/ace03c
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Evidence of a Massive Stellar Disruption in the X-Ray Spectrum of ASASSN-14li

Jon M. Miller,
Brenna Mockler,
Enrico Ramirez-Ruiz
et al.

Abstract: The proximity and duration of the tidal disruption event ASASSN-14li led to the discovery of narrow, blueshifted absorption lines in X-rays and UV. The gas seen in X-ray absorption is consistent with bound material close to the apocenter of elliptical orbital paths, or with a disk wind similar to those seen in Seyfert-1 active galactic nuclei. We present a new analysis of the deepest high-resolution XMM-Newton and Chandra spectra of ASASSN-14li. Driven by the relative strengths of He-like and H-like charge sta… Show more

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“…They suggest an intimate connection between black hole feedback and rapid (massive) star formation, indicative of what is often referred to as positive feedback, because the chemical timescales must be relatively short. This connection, resulting in the speed-up of chemical evolution, would be further enhanced by including the effects of stellar tidal disruptions as suggested to account for the relative-to-solar nitrogen-to-carbon abundance ratio enhancement and abundance pattern consistent with a single stellar tidal disruption event in a nearby AGN (Miller et al 2023), or by the possible role of very massive or even supermassive stars (Marques-Chaves et al 2024;Vink 2023).…”
Section: Introductionmentioning
confidence: 99%
“…They suggest an intimate connection between black hole feedback and rapid (massive) star formation, indicative of what is often referred to as positive feedback, because the chemical timescales must be relatively short. This connection, resulting in the speed-up of chemical evolution, would be further enhanced by including the effects of stellar tidal disruptions as suggested to account for the relative-to-solar nitrogen-to-carbon abundance ratio enhancement and abundance pattern consistent with a single stellar tidal disruption event in a nearby AGN (Miller et al 2023), or by the possible role of very massive or even supermassive stars (Marques-Chaves et al 2024;Vink 2023).…”
Section: Introductionmentioning
confidence: 99%