An ultraviolet–optical flare from the tidal disruption of a helium-rich stellar core

  title={An ultraviolet–optical flare from the tidal disruption of a helium-rich stellar core},
  author={S. Gezari and R. Chornock and A. Rest and M. Huber and K. Forster and E. Berger and P. Challis and J. Neill and D. Martin and T. Heckman and A. Lawrence and C. Norman and G. Narayan and R. Foley and G. Marion and D. Scolnic and L. Chomiuk and A. Soderberg and K. Smith and R. Kirshner and A. Riess and S. Smartt and C. Stubbs and J. Tonry and W. Wood-Vasey and W. Burgett and K. Chambers and T. Grav and J. Heasley and N. Kaiser and R. Kudritzki and E. Magnier and J. Morgan and P. Price},
The flare of radiation from the tidal disruption and accretion of a star can be used as a marker for supermassive black holes that otherwise lie dormant and undetected in the centres of distant galaxies. Previous candidate flares have had declining light curves in good agreement with expectations, but with poor constraints on the time of disruption and the type of star disrupted, because the rising emission was not observed. Recently, two ‘relativistic’ candidate tidal disruption events were… Expand
Stars that pass within the Roche radius of a supermassive black hole will be tidally disrupted, yielding a sudden injection of gas close to the black hole horizon which produces an electromagneticExpand
The X-ray through Optical Fluxes and Line Strengths of Tidal Disruption Events
Observations of luminous flares resulting from the possible tidal disruption of stars by supermassive black holes have raised a number of puzzles. Outstanding questions include the origin of theExpand
A likely decade-long sustained tidal disruption event
Multiwavelength flares from tidal disruption and accretion of stars can be used to find and study otherwise dormant massive black holes in galactic nuclei1. Previous well-monitored candidate flaresExpand
A luminous X-ray outburst from an intermediate-mass black hole in an off-centre star cluster
A unique signature for the presence of massive black holes in very dense stellar regions is occasional giant-amplitude outbursts of multi-wavelength radiation from tidal disruption and subsequentExpand
Flows of X-ray gas reveal the disruption of a star by a massive black hole
Flows of hot, ionized gas are detected in high-resolution X-ray spectra of a nearby tidal disruption event, ASASSN-14li in the galaxy PGC 043234, consistent with a rotating wind from the inner, super-Eddington region of a nascent accretion disk, or with a filament of disrupted stellar gas near to the apocentre of an elliptical orbit. Expand
A tidal disruption event in the nearby ultra-luminous infrared galaxy F01004-2237
Tidal disruption events (TDEs), in which stars are gravitationally disrupted as they pass close to the supermassive black holes in the centres of galaxies1, are potentially important probes of strongExpand
Tidal disruption and magnetic flux capture: powering a jet from a quiescent black hole
The transient Swift J1644+57 is believed to have been produced by an unlucky star wandering too close to a supermassive black hole (BH) leading to a tidal disruption event. This unusual flareExpand
Ultraviolet and optical observations of tidal disruption events
Tidal disruption events are expected to produce a luminous flare of radiation from fallback accretion of tidally disrupted stellar debris onto the central supermassive black hole. The firstExpand
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 coolExpand
Radio follow-up observations of stellar tidal disruption flares: Constraints on off-axis jets
Observations of active galactic nuclei (AGN) and X-ray binaries have shown that relativistic jets are ubiquitous when compact objects accrete. One could therefore anticipate the launch of a jet afterExpand


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 at a rate initially exceeding the Eddington rate, releasing a flareExpand
Multiband light curves of tidal disruption events
Unambiguous detection of the tidal disruption of a star would allow an assessment of the presence and masses of supermassive black holes in quiescent galaxies. It would also provide invaluableExpand
A dormant supermassive black hole lurking in the center of a galaxy will be revealed when a star passes close enough to be torn apart by tidal forces, and a flare of electromagnetic radiation isExpand
Relativistic jet activity from the tidal disruption of a star by a massive black hole
Observations of a bright X-ray flare from the extragalactic transient Swift J164449.3+573451 conclude that they have captured the onset of relativistic jet activity from a supermassive black hole. Expand
A Huge Drop in the X-Ray Luminosity of the Nonactive Galaxy RX J1242.6–1119A, and the First Postflare Spectrum: Testing the Tidal Disruption Scenario
In recent years, indirect evidence has emerged suggesting that many nearby nonactive galaxies harbor quiescent supermassive black holes. Knowledge of the frequency of occurrence of black holes, ofExpand
Flares from the Tidal Disruption of Stars by Massive Black Holes
Tidal disruption flares are differentiated into two classes: those that are sub-Eddington and those that radiate near the Eddington limit. Flares from black holes above ~2×107 M☉ will generally notExpand
Evolution of tidal disruption candidates discovered by XMM-Newton
It is shown that the detected low-state X-ray emission for these two candidates has properties such that it must still be related to the flare, and the tidal disruption rate as derived from the XMM-Newton slew survey has been computed and agrees with previous studies. Expand
A Possible Relativistic Jetted Outburst from a Massive Black Hole Fed by a Tidally Disrupted Star
Observations suggest a sudden accretion event onto a central MBH of mass about 106 to 107 solar masses, which leads to a natural analogy of Sw 1644+57 to a temporary smaller-scale blazar. Expand
Birth of a relativistic outflow in the unusual γ-ray transient Swift J164449.3+573451
It is concluded that the tidal disruption of a star naturally explains the observed high-energy properties and radio luminosity and the inferred rate of such events, and the weaker beaming in the radio-frequency spectrum relative to γ-rays or X-rays suggests that radio searches may uncover similar events out to redshifts of z ≈ 6. Expand
Optical Appearance of the Debris of a Star Disrupted by a Massive Black Hole
We show that the disruption of a star by a ~106 M☉ black hole in a galactic nucleus could under favorable circumstances produce an optically thick envelope that radiates with a thermal spectrum atExpand