SN 2023fyq is the first Type Ibn supernova with a directly detected hot luminous progenitor consistent with a low-mass helium star in a binary system, based on pre-explosion imaging, disappearance confirmation, and multi-wavelength environmental analysis.
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A new histogram-free likelihood method applied to simulated JWST observations of brown dwarfs shows that globular cluster ages can be determined with formal errors under 0.2 Gyr.
Extending to wCDM mainly suppresses the leading Planck Fisher eigenvalue to 2.7% of its LambdaCDM value with only modest eigenmode rotation, while late-time data adds curvature that limits tension relief.
A 75–190 pc non-thermal radio source coincident with FRB 20220912A is identified as a compact star-forming region with Σ_SFR ≳ 13 M☉/yr/kpc², supporting a young-magnetar progenitor channel.
A Bayesian two-step analysis of binary pulsar timing yields projected sensitivity limits for quadratic scalar and vector ultralight dark matter couplings across mass ranges that current experiments do not cover.
Experimental demonstration that SPADE with single-photon detectors achieves subdiffraction asymmetric source discrimination with lower error rates than direct imaging when crosstalk is below approximately 0.1.
Acoustic horizons in spinning black-hole accretion with spatially varying adiabatic index have surface gravities that depend on the black-hole spin parameter.
Experiments reveal that hydrogen plays a central role in forming SiC2, the key precursor to silicon carbide nanodust in carbon-rich stars.
N-body simulations show mild linear evolution in the logarithm of the Peebles spin parameter λ and a non-monotonic evolution with turnover at z≈1-2 for the Bullock λ', with closed-form fits provided for both mean and dispersion.
Simulations show the low-T/|W| instability develops robustly across five nuclear EOS in a rapidly rotating 35 M⊙ progenitor, with dominant GW frequency correlating to PNS compactness and stiffness.
Effective phantom dark energy is a background-level reconstruction that does not imply fundamental pathologies such as ghost instabilities or null energy condition violation by the underlying stress tensor.
MAGPHYS SED fits on nine bands (FUV–NUV–grz–W1–W4) recover stellar mass and SFR reliably provided at least six bands are detected.
Machine learning techniques can mitigate limitations in traditional weak-lensing analyses and enhance extraction of cosmological information from galaxy imaging surveys.
citing papers explorer
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SN 2023fyq: direct detection of a Type Ibn supernova progenitor and its multi-wavelength environmental constraints
SN 2023fyq is the first Type Ibn supernova with a directly detected hot luminous progenitor consistent with a low-mass helium star in a binary system, based on pre-explosion imaging, disappearance confirmation, and multi-wavelength environmental analysis.
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New Way to Date Globular Clusters: Brown Dwarf Cooling Sequences
A new histogram-free likelihood method applied to simulated JWST observations of brown dwarfs shows that globular cluster ages can be determined with formal errors under 0.2 Gyr.
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Information-Geometric Perspective on the Hubble Tension: Eigenmode Rotation and Curvature Suppression in wCDM
Extending to wCDM mainly suppresses the leading Planck Fisher eigenvalue to 2.7% of its LambdaCDM value with only modest eigenmode rotation, while late-time data adds curvature that limits tension relief.
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Unveiling the Local Environment of FRB 20220912A: Sub-arcsecond $4-26$ GHz Radio Continuum Mapping
A 75–190 pc non-thermal radio source coincident with FRB 20220912A is identified as a compact star-forming region with Σ_SFR ≳ 13 M☉/yr/kpc², supporting a young-magnetar progenitor channel.
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Sensitivity of binary pulsar timing to spin-0 and spin-1 ultralight dark matter
A Bayesian two-step analysis of binary pulsar timing yields projected sensitivity limits for quadratic scalar and vector ultralight dark matter couplings across mass ranges that current experiments do not cover.
-
Experimental subdiffraction source discrimination enabled by spatial demultiplexing and single-photon detectors
Experimental demonstration that SPADE with single-photon detectors achieves subdiffraction asymmetric source discrimination with lower error rates than direct imaging when crosstalk is below approximately 0.1.
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On the spin dependence of the emergent gravity phenomena as observed in axially symmetric black hole accretion with spatially varying adiabatic index
Acoustic horizons in spinning black-hole accretion with spatially varying adiabatic index have surface gravities that depend on the black-hole spin parameter.
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The Significant Role of Hydrogen in the Formation of Silicon Carbide in Evolved Stars
Experiments reveal that hydrogen plays a central role in forming SiC2, the key precursor to silicon carbide nanodust in carbon-rich stars.
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On the redshift evolution of the spin parameter in cosmological simulations
N-body simulations show mild linear evolution in the logarithm of the Peebles spin parameter λ and a non-monotonic evolution with turnover at z≈1-2 for the Bullock λ', with closed-form fits provided for both mean and dispersion.
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Impact of the equation of state on core collapse supernovae I: the low-$T/|W|$ instability
Simulations show the low-T/|W| instability develops robustly across five nuclear EOS in a rapidly rotating 35 M⊙ progenitor, with dominant GW frequency correlating to PNS compactness and stiffness.
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Effective Phantom Dark Energy: What Cosmological Reconstruction Does and Does Not Imply
Effective phantom dark energy is a background-level reconstruction that does not imply fundamental pathologies such as ghost instabilities or null energy condition violation by the underlying stress tensor.
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Interpreting Galaxy Physical Properties Using Stellar Population Synthesis
MAGPHYS SED fits on nine bands (FUV–NUV–grz–W1–W4) recover stellar mass and SFR reliably provided at least six bands are detected.
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Machine-learning applications for weak-lensing cosmology
Machine learning techniques can mitigate limitations in traditional weak-lensing analyses and enhance extraction of cosmological information from galaxy imaging surveys.