A new method infers inhomogeneities and asymmetries in high-energy transients from their radio synchrotron self-absorption spectra and demonstrates it on SN 2016coi and AT2018cow.
Discovery of an outflow from radio observations of the tidal disruption event ASASSN-14li
4 Pith papers cite this work. Polarity classification is still indexing.
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abstract
We report the discovery of transient radio emission from the nearby optically-discovered TDE ASASSN-14li (distance of 90 Mpc), making it the first typical TDE detected in the radio, and unambiguously pointing to the formation of a non-relativistic outflow with a kinetic energy of $\approx (4-10)\times10^{47}$ erg, a velocity of $\approx 12,000-36,000$ km s$^{-1}$, and a mass of $\approx 3\times10^{-5}-7\times10^{-4}$ M$_{\odot}$. We show that the outflow was ejected on 2014 August 11--25, in agreement with an independent estimate of the timing of super-Eddington accretion based on the optical, UV, and X-ray observations, and that the ejected mass corresponds to about $1-10\%$ of the mass accreted in the super-Eddington phase. The temporal evolution of the radio emission also uncovers the circumnuclear density profile, $\rho(R)\propto R^{-2.5}$ on a scale of about 0.01 pc, a scale that cannot be probed via direct measurements even in the nearest SMBHs. Our discovery of radio emission from the nearest well-studied TDE to date, with a radio luminosity lower than all previous limits, indicates that non-relativistic outflows are ubiquitous in TDEs, and that future, more sensitive, radio surveys will uncover similar events.
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astro-ph.HE 4years
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UNVERDICTED 4representative citing papers
Anomalous pre-intersection dissipation in TDE simulations is numerical in origin, arising from pericenter kinematics combined with algorithm sensitivities to converging versus diverging flows.
3D hydro simulations show that TDE outflow interactions with a broken power-law CNM can reproduce the range of observed radio light curves via early flares inside the Bondi radius and possible late rebrightenings outside it.
The paper provides observing strategies, detection forecasts, and predictions for using SKA and VLBI to study radio emission from tidal disruption events around supermassive black holes.
citing papers explorer
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Constraining inhomogeneities and asymmetries in SNe, FBOTs, and other high-energy transients from unresolved radio observations
A new method infers inhomogeneities and asymmetries in high-energy transients from their radio synchrotron self-absorption spectra and demonstrates it on SN 2016coi and AT2018cow.
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On the origin of anomalous dissipation in simulations of tidal disruption events
Anomalous pre-intersection dissipation in TDE simulations is numerical in origin, arising from pericenter kinematics combined with algorithm sensitivities to converging versus diverging flows.
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Simulations of interaction between outflow and surrounding broken power-law circumnuclear medium: implications for different radio light curves of TDEs
3D hydro simulations show that TDE outflow interactions with a broken power-law CNM can reproduce the range of observed radio light curves via early flares inside the Bondi radius and possible late rebrightenings outside it.
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Exploring Tidal Disruption Events with SKA and VLBI: Unveiling the Mystery of Black Hole Feeding and Outflows
The paper provides observing strategies, detection forecasts, and predictions for using SKA and VLBI to study radio emission from tidal disruption events around supermassive black holes.