Modeling the fast optical transient SN 2019bkc/ATLAS19dqr with a central engine and implication for its origin
arXiv:2103.15576 · doi:10.1088/1674-4527/21/8/200
Abstract
Modern wide-field high-cadence surveys have revealed the significant diversity of optical transient phenomena in their luminosity and timescale distributions, which led to the discovery of some mysterious fast optical transients (FOTs). These FOTs can usually rise and decline remarkably in a timescale of a few days to weeks, which are obviously much rapider than ordinary supernovae. SN 2019bkc/ATLAS19dqr is one of the fastest detected FOTs so far and, meanwhile, it was found to be un-associated with a host galaxy. These discoveries provide a good chance to explore the possible origins of FOTs. So, we model the light curves of SN 2019bkc in details. It is found that SN 2019bkc can be well explained by the thermal emission of an explosion ejecta that is powered by a long-lasting central engine. The engine could be a spinning-down millisecond magnetar or a fallback accretion onto a compact object. Combining the engine property, the mass of the ejecta, and the hostlessness of SN 2019bkc, we suggest that this FOT is likely to originate from a merger of a white dwarf and a neutron star.
arXiv commentAccepted for publication in RAA;9 pages,2 figures and 1 table
References in corpus (59)
- Transient Events from Neutron Star Mergers
- ATLAS: A High-Cadence All-Sky Survey System
- Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event
- Electromagnetic Counterparts of Compact Object Mergers Powered by the Radioactive Decay of R-process Nuclei
- Swope Supernova Survey 2017a (SSS17a), the Optical Counterpart to a Gravitational Wave Source
- The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. II. UV, Optical, and Near-IR Light Curves and Comparison to Kilonova Models
- Spectroscopic identification of r-process nucleosynthesis in a double neutron star merger
- The X-ray counterpart to the gravitational wave event GW 170817
- A kilonova as the electromagnetic counterpart to a gravitational-wave source
- Light Curves of the Neutron Star Merger GW170817/SSS17a: Implications for R-Process Nucleosynthesis
- Illuminating Gravitational Waves: A Concordant Picture of Photons from a Neutron Star Merger
- Supernova Light Curves Powered by Young Magnetars
- The Emergence of a Lanthanide-Rich Kilonova Following the Merger of Two Neutron Stars
- Optical emission from a kilonova following a gravitational-wave-detected neutron-star merger
- On the astrophysical robustness of neutron star merger r-process
- Swift and NuSTAR observations of GW170817: detection of a blue kilonova
- The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. IV. Detection of Near-infrared Signatures of r-process Nucleosynthesis with Gemini-South
- Bright Supernovae from Magnetar Birth
- The Electromagnetic Counterpart of the Binary Neutron Star Merger LIGO/VIRGO GW170817. III. Optical and UV Spectra of a Blue Kilonova From Fast Polar Ejecta
- Radiative Transfer Simulations for Neutron Star Merger Ejecta
- The discovery of the electromagnetic counterpart of GW170817: kilonova AT 2017gfo/DLT17ck
- Kilonovae
- Faint Thermonuclear Supernovae from AM Canum Venaticorum Binaries
- X-Ray Flares from Postmerger Millisecond Pulsars
- Rapidly-Evolving and Luminous Transients from Pan-STARRS1
- Gamma-Ray Bursts and Afterglows from Rotating Strange Stars and Neutron Stars
- Optical and X-ray emission from stable millisecond magnetars formed from the merger of binary neutron stars
- Supernova Light Curves Powered by Fallback Accretion
- Multi-Dimensional Simulations of the Accretion-Induced Collapse of White Dwarfs to Neutron Stars
- MASTER optical detection of the first LIGO/Virgo neutron stars merging GW170817
- Bright "merger-nova" from the remnant of a neutron star binary merger: A signature of a newly born, massive, millisecond magnetar
- The Cow: discovery of a luminous, hot and rapidly evolving transient
- The Fast, Luminous Ultraviolet Transient AT2018cow: Extreme Supernova, or Disruption of a Star by an Intermediate-Mass Black Hole?
- Ultra-stripped Type Ic supernovae from close binary evolution
- Follow up of GW170817 and its electromagnetic counterpart by Australian-led observing programs
- J-GEM observations of an electromagnetic counterpart to the neutron star merger GW170817
- Thermonuclear .Ia Supernovae from Helium Shell Detonations: Explosion Models and Observables
- Rapidly evolving transients in the Dark Energy Survey
- A long-lived neutron star merger remnant in GW170817: constraints and clues from X-ray observations
- Relativistic Wind Bubbles and Afterglow Signatures
- A long-lived remnant neutron star after GW170817 inferred from its associated kilonova
- Supernova Fallback onto Magnetars and Propeller-Powered Supernovae
- Nuclear-dominated accretion and subluminous supernovae from the merger of a white dwarf with a neutron star or black hole
- Signatures of pulsars in the light curves of newly formed supernova remnants
- Time dependent models of accretion disks with nuclear burning following the tidal disruption of a white dwarf by a neutron star
- Viscous-Dynamical Ejecta from Binary Neutron Star Merger
- What Powered the Optical Transient AT2017gfo Associated with GW170817?
- The role of newly born magnetars in gamma-ray burst X-ray afterglow emission: Energy injection and internal emission
- Neutron star - white dwarf mergers: Early evolution, physical properties, and outcomes
- Rapidly Evolving and Luminous Transients Driven by Newly Born Neutron Stars
- Photospheric Radius Evolution of Homologous Explosions
- SN2018kzr: a rapidly declining transient from the destruction of a white dwarf
- X-ray transients from the accretion-induced collapse of white dwarfs
- A Pulsar Wind Nebula Embedded in the Kilonova AT2017gfo Associated with GW 170817/GRB 170817A
- AT2018kzr: the merger of an oxygen-neon white dwarf and a neutron star or black hole
- The Most Rapidly Declining Type I Supernova 2019bkc/ATLAS19dqr
- The rise and fall of an extraordinary Ca-rich transient -- The discovery of ATLAS19dqr/SN 2019bkc
- Optical and radio transients after the collapse of super-Chandrasekhar white dwarf merger remnants
- Rapid Transients Originating from Thermonuclear Explosions in Helium White Dwarf Tidal Disruption Events