The superluminous transient ASASSN-15lh as a tidal disruption event from a Kerr black hole

  title={The superluminous transient ASASSN-15lh as a tidal disruption event from a Kerr black hole},
  author={Giorgos Leloudas and Morgan Fraser and Nicholas C. Stone and Sjoert van Velzen and Peter G. Jonker and Iair Arcavi and Christoffer U. Fremling and Justyn R. Maund and Steven J. Smartt and Thomas Kruhler and James C. A. Miller-Jones and Paul M. Vreeswijk and Avishay Gal-yam and Paolo A. Mazzali and Annalisa De Cia and D. Andrew Howell and Cosimo Inserra and Ferdinando Patat and A. de Ugarte Postigo and Ofer Yaron and Chris Ashall and I. Bar and Heather Campbell and T.-W. Chen and Michael J. Childress and Nancy Elias-Rosa and Jussi Harmanen and Griffin Hosseinzadeh and Joel Johansson and Tuomas Kangas and Erkki Kankare and S. Kim and Hanindyo Kuncarayakti and Joseph D. Lyman and Mark R. Magee and Kate Maguire and Daniele B. Malesani and Seppo Mattila and Curtis McCully and Matt Nicholl and Simon J. Prentice and Cristina Romero-Ca{\~n}izales and Steve Schulze and K. W. Smith and Jesper Sollerman and Mark Sullivan and Brad E. Tucker and Stefano Valenti and J. Craig Wheeler and David R. Young},
  journal={Nature Astronomy},
When a star passes within the tidal radius of a supermassive black hole, it will be torn apart1. For a star with the mass of the Sun (M ⊙) and a non-spinning black hole with a mass 108 M ⊙ 12,13, a star with the same mass as the Sun could be disrupted outside the event horizon if the black hole were spinning rapidly14. The rapid spin and high black hole mass can explain the high luminosity of this event. 

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We present the discovery of PS18kh, a tidal disruption event discovered at the center of SDSS J075654.53+341543.6 (d ≃ 322 Mpc) by the Pan-STARRS Survey for Transients. Our data set includes

The Process of Stellar Tidal Disruption by Supermassive Black Holes

Tidal disruption events (TDEs) are among the brightest transients in the optical, ultraviolet, and X-ray sky. These flares are set into motion when a star is torn apart by the tidal field of a

The supermassive black hole coincident with the luminous transient ASASSN-15lh

The progenitors of astronomical transients are linked to a specific stellar population and galactic environment, and observing their host galaxies hence constrains the physical nature of the

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We analyze the outcome of the interaction between a stellar binary and a supermassive black hole binary (SMBHB) by performing a large number of gravitational scattering experiments. Most of the



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We consider the evolution of the angular momentum of a supermassive (M h ∼10 7 -10 9 M ○ .) black hole in the centre of a dense star cluster of mass M c >M h . Our treatment of this problem is based

Spectroscopic Signatures of the Tidal Disruption of Stars by Massive Black Holes

During the tidal disruption of a main sequence star by a massive black hole (BH) having mass MBH � 10 7 M� , the stellar debris falls back to the BH at a rate well above the Eddington rate. Some


Main-sequence disruptions of stars by supermassive black holes result in the production of an extended, geometrically thin debris stream winding repeatedly around the black hole. In the absence of

Optical Flares from the Tidal Disruption of Stars by Massive Black Holes

A star that wanders too close to a massive black hole (BH) is shredded by the BH's tidal gravity. Stellar gas falls back to the BH, releasing a flare of energy. In anticipation of upcoming transient

A bright year for tidal disruptions

When a star is tidally disrupted by a supermassive black hole (BH), roughly half of its mass falls back to the BH at super-Eddington rates. Being tenuously gravitationally bound and unable to cool


When a star comes within a critical distance to a supermassive black hole (SMBH), immense tidal forces disrupt the star, resulting in a stream of debris that falls back onto the SMBH and powers a

A radio jet from the optical and x-ray bright stellar tidal disruption flare ASASSN-14li

Radio follow-up observations of known thermal stellar tidal disruption flares (TDFs) are monitored and a detection of variable radio emission from a thermal TDF, which is interpreted as originating from a newly launched jet, suggests that all TDFs could be accompanied by a jet.


The recent discovery of the unprecedentedly super-luminous transient ASASSN-15lh (or SN 2015L) with its UV-bright secondary peak challenges all the power-input models that have been proposed for

Black-Hole Spin Dependence in the Light Curves of Tidal Disruption Events

A star orbiting a supermassive black hole can be tidally disrupted if the black hole's gravitational tidal field exceeds the star's self gravity at pericenter. Some of this stellar tidal debris can

Swift J1644+57 gone MAD: the case for dynamically-important magnetic flux threading the black hole in a jetted tidal disruption event

The unusual transient Swift J1644+57 likely resulted from a collimated relativistic jet, powered by the sudden onset of accretion onto a massive black hole (BH) following the tidal disruption (TD) of