Synthetic observables from tECSN models show slower early red-color decline due to higher Ti/Cr and a late-time 12.8 μm Ne II line that strengthens over time, unlike comparable CO deflagration models.
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Ten new eclipsing WD + cool M-dwarf binaries found in TESS data via a targeted minute-scale eclipse search, increasing the TESS-discovered sample by an order of magnitude.
3D hydro simulations demonstrate that donor central concentration (ρ_c/ρ_bar) controls inspiral morphology and mass-ejection history in common-envelope events for luminous red novae.
Simulations find nested bow shocks around an engulfed neutron star enhance drag force 10-100 times over Bondi-Hoyle-Lyttleton and allow force reversal based on envelope conditions.
Radio and X-ray data on four old Type IIn supernovae show mass-loss rates 1-2 orders of magnitude below optical estimates, indicating rapidly evolving progenitor winds over the final centuries before explosion.
Detection of GW190814 from the coalescence of a 23 solar-mass black hole and a 2.6 solar-mass compact object, the most unequal-mass binary yet observed with gravitational waves.
A coupled magnetar–CSM hybrid model produces diverse SLSN light curves by letting the magnetar-driven shock overtake and dominate circumstellar interaction.
Deep AO imaging of 18 black-hole and neutron-star binaries finds no confirmed tertiary stars, ruling out most main-sequence companions at separations beyond roughly 500–2000 au.
Efficient mass transfer in binaries naturally limits the mass of the first-born black hole and produces a sharp drop above 45 solar masses that mimics the pair-instability gap.
2D general-relativistic simulations of Bondi-Hoyle-Lyttleton accretion onto a Kerr black hole in a common envelope yield analytical fits for mass/momentum accretion rates and bremsstrahlung luminosity as functions of spin, Mach number, and density gradient.
SPH simulations of AGB wind-binary interactions over 600+ orbital periods show that slow winds with massive companions produce circumbinary disks via wind Roche-lobe overflow, with disk morphology depending on eccentricity and mass ratio.
Mass-ratio reversal in isolated binaries offers a viable formation path for GW241011-like events under specific stellar-evolution and interaction conditions.
Analytical stationary isentropic solution to spherically symmetric Euler equations for recombination-driven stellar winds with derived mass-loss rates applied to evolved stars.
Recombination energy is unlikely to drive steady transonic stellar winds from gravitationally bound gas without prior unbinding or radiative losses, but can accelerate pre-existing outflows to high mass-loss rates.
Simulations show that intermediate-mass progenitors with non-degenerate cores before helium burning produce a mass-orbital period relation for massive white dwarfs that accounts for long-period systems.
Enhanced angular-momentum loss via outer-Lagrangian mass ejection shifts the ELM white-dwarf mass–period relation downward and reproduces most observed short-period systems.
2CXO J0507 is a polar-type magnetic cataclysmic variable featuring a white dwarf with B ≈ 30 MG and an orbital period of 2.34 hours, identified through multiwavelength archival and follow-up data.
Interstellar objects may contribute enough baryonic mass to reduce the local dark matter halo density to 0.24 GeV/cm³.
Reconstruction of GRO J1655-40, SAX J1819.3-2525 and 4U 1543-47 requires CE efficiencies α_0.5U ≳6.7, α_U ≳4.2, α_H ≳1.7 with no solutions below unity, implying need for additional energy or formalism changes plus natal kicks ≳50 km/s for 4U 1543-47.
The review identifies and discusses key unsolved problems in planetary nebulae such as 3D morphology, multipolar origins, dust distribution, binarity, and the abundance discrepancy, along with suggested future directions.
Review summarizing the role of dense-matter equation of state, weak interactions, and r-process nucleosynthesis in binary neutron star mergers and their multimessenger observables.
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Observational signatures of thermonuclear electron-capture supernovae -- Ne II line strengthening and color evolution as traces of the explosion mechanism
Synthetic observables from tECSN models show slower early red-color decline due to higher Ti/Cr and a late-time 12.8 μm Ne II line that strengthens over time, unlike comparable CO deflagration models.
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A Previously Underexplored Regime in TESS: Minute-Scale Eclipses Reveal Ten White Dwarf-Cool M-Dwarf Binaries
Ten new eclipsing WD + cool M-dwarf binaries found in TESS data via a targeted minute-scale eclipse search, increasing the TESS-discovered sample by an order of magnitude.
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Hydrodynamic Response of Mildly Evolved Common Envelope Donors in Luminous Red Novae
3D hydro simulations demonstrate that donor central concentration (ρ_c/ρ_bar) controls inspiral morphology and mass-ejection history in common-envelope events for luminous red novae.
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Numerical Studies of Accretion Flows onto a Neutron Star Engulfed in a Massive Star
Simulations find nested bow shocks around an engulfed neutron star enhance drag force 10-100 times over Bondi-Hoyle-Lyttleton and allow force reversal based on envelope conditions.
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Fading Echoes of Interaction: Probing Centuries of Preexplosion Mass-Loss in Four Type IIn Supernovae
Radio and X-ray data on four old Type IIn supernovae show mass-loss rates 1-2 orders of magnitude below optical estimates, indicating rapidly evolving progenitor winds over the final centuries before explosion.
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GW190814: Gravitational Waves from the Coalescence of a 23 M$_\odot$ Black Hole with a 2.6 M$_\odot$ Compact Object
Detection of GW190814 from the coalescence of a 23 solar-mass black hole and a 2.6 solar-mass compact object, the most unequal-mass binary yet observed with gravitational waves.
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A Magnetar Engine and Circumstellar Medium Interaction: Synergistic Effects in Producing Superluminous Supernovae
A coupled magnetar–CSM hybrid model produces diverse SLSN light curves by letting the magnetar-driven shock overtake and dominate circumstellar interaction.
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Searching for the Third Wheel: High-Contrast Imaging Constraints on Tertiaries to Black Hole and Neutron Star Binaries
Deep AO imaging of 18 black-hole and neutron-star binaries finds no confirmed tertiary stars, ruling out most main-sequence companions at separations beyond roughly 500–2000 au.
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Binary Evolution Can Mimic the Pair-Instability Mass Gap in Black Hole Mergers
Efficient mass transfer in binaries naturally limits the mass of the first-born black hole and produces a sharp drop above 45 solar masses that mimics the pair-instability gap.
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Relativistic Common-envelope Dynamics of a Stellar-mass Black Hole II: Kerr Black Hole
2D general-relativistic simulations of Bondi-Hoyle-Lyttleton accretion onto a Kerr black hole in a common envelope yield analytical fits for mass/momentum accretion rates and bremsstrahlung luminosity as functions of spin, Mach number, and density gradient.
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Circumbinary disk formation through AGB star winds
SPH simulations of AGB wind-binary interactions over 600+ orbital periods show that slow winds with massive companions produce circumbinary disks via wind Roche-lobe overflow, with disk morphology depending on eccentricity and mass ratio.
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Mass-Ratio Reversal as an Alternative to Hierarchical Mergers for GW241011
Mass-ratio reversal in isolated binaries offers a viable formation path for GW241011-like events under specific stellar-evolution and interaction conditions.
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Transonic Solutions for Recombination-Driven Stellar Winds
Analytical stationary isentropic solution to spherically symmetric Euler equations for recombination-driven stellar winds with derived mass-loss rates applied to evolved stars.
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Steady-state Stellar Winds Driven by Recombination
Recombination energy is unlikely to drive steady transonic stellar winds from gravitationally bound gas without prior unbinding or radiative losses, but can accelerate pre-existing outflows to high mass-loss rates.
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Mass-Orbital Period Distribution of Massive White Dwarfs Formed Through Stable Mass Transfer
Simulations show that intermediate-mass progenitors with non-degenerate cores before helium burning produce a mass-orbital period relation for massive white dwarfs that accounts for long-period systems.
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Formation of Extremely Low-mass White Dwarf Binaries Undergoing Enhanced Angular Momentum Loss
Enhanced angular-momentum loss via outer-Lagrangian mass ejection shifts the ELM white-dwarf mass–period relation downward and reproduces most observed short-period systems.
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Multiwavelength Characterization of a New Magnetic Cataclysmic Variable 2CXO J050740.7-091337
2CXO J0507 is a polar-type magnetic cataclysmic variable featuring a white dwarf with B ≈ 30 MG and an orbital period of 2.34 hours, identified through multiwavelength archival and follow-up data.
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Contribution of interstellar objects to local dark matter density
Interstellar objects may contribute enough baryonic mass to reduce the local dark matter halo density to 0.24 GeV/cm³.
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A Path to Constraints on Common Envelope Ejection in Massive Binaries: Full Evolutionary Reconstruction of Three Black Hole X-ray Binaries
Reconstruction of GRO J1655-40, SAX J1819.3-2525 and 4U 1543-47 requires CE efficiencies α_0.5U ≳6.7, α_U ≳4.2, α_H ≳1.7 with no solutions below unity, implying need for additional energy or formalism changes plus natal kicks ≳50 km/s for 4U 1543-47.
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Current Unsolved Problems in Planetary Nebulae Research
The review identifies and discusses key unsolved problems in planetary nebulae such as 3D morphology, multipolar origins, dust distribution, binarity, and the abundance discrepancy, along with suggested future directions.
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Nuclear Physics of Binary Neutron Star Mergers
Review summarizing the role of dense-matter equation of state, weak interactions, and r-process nucleosynthesis in binary neutron star mergers and their multimessenger observables.
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