期刊
ASTROPHYSICAL JOURNAL
卷 899, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/ab9c9f
关键词
Black hole physics; Hydrodynamics; Galaxy nuclei
资金
- Syracuse University HTC Campus Grid
- NSF [ACI-1341006]
- NASA through the Hubble Fellowship - Space Telescope Science Institute [HST-HF2-51433.001-A]
- National Science Foundation [AAG-2006684]
- Science and Technology Facilities Council [ST/M005917/1]
- BEIS capital funding via STFC capital grants [ST/K000373/1, ST/R002363/1]
- BEIS capital funding via STFC DiRAC Operations grant [ST/R001014/1]
- European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant [823823]
- NASA [NAS5-26555]
- STFC [ST/P002447/1, ST/K00333X/1, ST/V002376/1, ST/L000636/1, ST/T001569/1, ST/T001550/1, ST/R001014/1, ST/J005673/1, ST/M007618/1, ST/M007006/1, ST/S003916/1, ST/T00049X/1, ST/R001006/1, ST/P003400/1, ST/V002635/1, ST/R001049/1, ST/M007065/1, ST/T001372/1, ST/V002384/1, ST/P000673/1, ST/R00689X/1, ST/M005917/1, ST/M007073/1, ST/M006948/1, ST/T001348/1, ST/M006530/1, ST/R000832/1, ST/S003762/1] Funding Source: UKRI
A tidal disruption event (TDE) occurs when a star plunges through a supermassive black hole's tidal radius, at which point the star's self-gravity is overwhelmed by the tidal gravity of the black hole. In a partial TDE, where the star does not reach the full disruption radius, only a fraction of the star's mass is tidally stripped while the rest remains intact in the form of a surviving core. Analytical arguments have recently suggested that the temporal scaling of the fallback rate of debris to the black hole asymptotes tot(-9/4)for partial disruptions, effectively independently of the mass of the intact core. We present hydrodynamical simulations that verify the existence of this predicted,t(-9/4)scaling. We also define a break timescale-the time at which the fallback rate transitions from at(-5/3)scaling to the characteristict(-9/4)scaling-and measure this break timescale as a function of the impact parameter and the surviving core mass. These results deepen our understanding of the properties and breadth of possible fallback curves expected from TDEs and will therefore facilitate more accurate interpretation of data from wide-field surveys.
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