359 citations · 1.8k across the 21 of their papers we have counts for
21 papers
A radio-emitting outflow produced by the tidal disruption event AT2020vwl
A. J. Goodwin, K. D. Alexander, J. C. A. Miller-Jones +12
A tidal disruption event (TDE) occurs when a star is destroyed by a supermassive black hole. Broadband radio spectral observations of TDEs trace the emission from any outflows or j…
Optical/UV Emission in the Tidal Disruption Event ASASSN-14li: Implications of Disc Modeling
Sixiang Wen, Peter G. Jonker, Nicholas C. Stone +2
We predict late-time optical/UV emission from tidal disruption events (TDEs) from our slim accretion disc model \citep{Wen20} and explore the impact of the black hole mass $M_\bull…
Tidal Disruption Event Demographics with the Zwicky Transient Facility: Volumetric Rates, Luminosity Function, and Implications for the Local Black Hole Mass Function
Yuhan Yao, Vikram Ravi, Suvi Gezari +26
We conduct a systematic tidal disruption event (TDE) demographics analysis using the largest sample of optically selected TDEs. A flux-limited, spectroscopically complete sample of…
Identifying Tidal Disruption Events with an Expansion of the FLEET Machine Learning Algorithm
Sebastian Gomez, V. Ashley Villar, Edo Berger +5
We present an expansion of FLEET, a machine learning algorithm optimized to select transients that are most likely to be tidal disruption events (TDEs). FLEET is based on a random…
Radio observations of the tidal disruption event AT2020opy: a luminous non-relativistic outflow encountering a dense circumnuclear medium
Adelle J. Goodwin, James Miller-Jones, Sjoert van Velzen +9
Tidal disruption events (TDEs) occur when a star passes too close to a supermassive black hole and is destroyed by tidal gravitational forces. Radio observations of TDEs trace sync…
The fall of CSS100217: a tidal disruption-induced low state in an apparently hostless active galactic nucleus
G. Cannizzaro, A. J. Levan, S. van Velzen +1
CSS100217 was a nuclear, rapid and luminous flare in a Narrow-Line Seyfert 1 galaxy, whose initial interpretation as a supernova is now debated between variability of the active ga…
AT2019azh: an unusually long-lived, radio-bright thermal tidal disruption event
A. J. Goodwin, S. van Velzen, J. C. A. Miller-Jones +7
Tidal disruption events (TDEs) occur when a star is destroyed by a supermassive black hole at the center of a galaxy, temporarily increasing the accretion rate onto the black hole…
Candidate Tidal Disruption Event AT2019fdr Coincident with a High-Energy Neutrino
Simeon Reusch, Robert Stein, Marek Kowalski +46
The origins of the high-energy cosmic neutrino flux remain largely unknown. Recently, one high-energy neutrino was associated with a tidal disruption event (TDE). Here we present A…
Rapid accretion state transitions following the tidal disruption event AT2018fyk
Thomas Wevers, Dheeraj R. Pasham, Sjoert van Velzen +7
Following a tidal disruption event (TDE), the accretion rate can evolve from quiescent to near-Eddington levels and back over months - years timescales. This provides a unique oppo…
Quasars That Have Transitioned from Radio-quiet to Radio-loud on Decadal Timescales Revealed by VLASS and FIRST
Kristina Nyland, Dillon Z. Dong, Pallavi Patil +21
We have performed a search over 3440 deg of Epoch 1 (2017-2019) of the Very Large Array Sky Survey to identify unobscured quasars in the optical () and obscured…
AGN on the move: A search for off-nuclear AGN from recoiling SMBHs and ongoing galaxy mergers with the Zwicky Transient Facility
Charlotte Ward, Suvi Gezari, Sara Frederick +16
A supermassive black hole (SMBH) ejected from the potential well of its host galaxy via gravitational wave recoil carries important information about the mass ratio and spin alignm…
Forward Modeling Populations of Flares from Tidal Disruptions of Stars by Super-massive Black Holes
Nathaniel Roth, Sjoert van Velzen, S. Bradley Cenko +1
Detections of the tidal disruption flares (TDFs) of stars by supermassive black holes (SMBHs) are rapidly accumulating as optical surveys improve. These detections may provide cons…
Late-time UV observations of tidal disruption flares reveal unobscured, compact accretion disks
Sjoert van Velzen, Nicholas C. Stone, Brian D. Metzger +3
The origin of thermal optical and UV emission from stellar tidal disruption flares (TDFs) remains an open question. We present Hubble Space Telescope far-UV (FUV) observations of e…
Sifting for Sapphires: Systematic Selection of Tidal Disruption Events in iPTF
T. Hung, S. Gezari, S. B. Cenko +15
We present results from a systematic selection of tidal disruption events (TDEs) in a wide-area (4800~deg), band, Intermediate Palomar Transient Factory (iPTF) experiment…
Discovery of a time lag between the soft X-ray and radio emission of the tidal disruption flare ASASSN-14li: Evidence for linear disk-jet coupling
Dheeraj R. Pasham, Sjoert van Velzen
The tidal disruption of a star by a supermassive black hole can result in transient radio emission. The electrons producing these synchrotron radio flares could either be accelerat…
The Lockman Hole project: LOFAR observations and spectral index properties of low-frequency radio sources
E. K. Mahony, R. Morganti, I. Prandoni +21
The Lockman Hole is a well-studied extragalactic field with extensive multi-band ancillary data covering a wide range in frequency, essential for characterising the physical and ev…
The Superluminous Transient ASASSN-15lh as a Tidal Disruption Event from a Kerr Black Hole
G. Leloudas, M. Fraser, N. C. Stone +47
When a star passes within the tidal radius of a supermassive black hole, it will be torn apart. For a star with the mass of the Sun () and a non-spinning black hole with a…
Discovery of transient infrared emission from dust heated by stellar tidal disruption flares
Sjoert van Velzen, Alexander J. Mendez, Julian H. Krolik +1
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…
The Magnetic Field and Polarization Properties of Radio Galaxies in Different Accretion States
Shane P. O'Sullivan, B. M. Gaensler, M. A. Lara-López +3
We use the integrated polarized radio emission at 1.4 GHz () from a large sample of AGN (796 sources at redshifts ) to study the large-scale magnetic field…
Measurement of the rate of stellar tidal disruption flares
Sjoert van Velzen, Glennys R. Farrar
We report an observational estimate of the rate of stellar tidal disruption flares (TDFs) in inactive galaxies, based on a successful search for these events among transients in ga…
Optical discovery of probable stellar tidal disruption flares
Sjoert van Velzen, Glennys R. Farrar, Suvi Gezari +6
Using archival SDSS multi-epoch imaging data (Stripe 82), we have searched for the tidal disruption of stars by super-massive black holes in non-active galaxies. Two candidate tida…