Iyer–Wald Approach Links Generalized Entropy to Modified Gravity
A theoretical analysis reconstructs generalized black-hole horizon entropy from a modified curvature Lagrangian within spherically symmetric vacuum solutions.
Tag: cosmology
Two-Higgs simulations reveal unusually durable cosmic domain walls
Classical simulations of a symmetry-restricted two-Higgs-doublet model produced closed domain-wall remnants whose radiation can be strongly suppressed, allowing them to ...
A Single Scalar Wave Field May Explain Both Newtonian Gravity and Dark Matter
A new scalar-field framework derives Newtonian gravity, a cosmic acceleration scale, and dark-matter-like corrections from the wave statistics of ordinary ...
Black Hole Entropy Gets a New Twist as Cotton Gravity Passes the Thermodynamics Test
A new thermodynamic formulation shows that Cotton gravity modifies black hole and cosmological horizon entropy in a way that can ...
Reworking Brans-Dicke Gravity: A New Route to Dark Energy and the Hubble Tension
A new dynamical systems analysis shows that a generalised Brans-Dicke theory with a non-canonical scalar field can reproduce the background ...
DESI Data Put Holographic Dark Energy Models to the Test
A new comparative analysis using DESI DR2 baryon acoustic oscillations, supernovae, and cosmic chronometers finds that holographic dark energy models ...
Cosmological Data Suggest the Universe Will Never End in a Big Crunch
A new study of nonminimally coupled quintessence shows that observational data favor parameter regions in which the universe avoids a ...
MeerKAT telescope catches faint hydrogen whisper from billions of light years away
Astronomers using South Africa's MeerKAT telescope have directly detected the faint 21-centimetre radio signal of neutral hydrogen from billions of ...
Helium Measurements Sharpen Picture of the Universe’s First Minutes
A new study using the Large Binocular Telescope has measured helium in metal-poor galaxies with unprecedented precision, confirming that the ...
Magnetic Fields May Push White Dwarfs Past the Chandrasekhar Limit
New simulations from the Indian Institute of Science show that strong internal magnetic fields can allow white dwarfs to grow ...
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Mothers who receive childcare support from maternal grandparents show more parental warmth, finds NTU Singapore study
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University of Seville Breaks 120-Year-Old Mystery, Revises a Key Einstein Concept
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Bee body mass, pathogens and local climate influence heat tolerance
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Researchers record first-ever images and data of a shark experiencing a boat strike
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Groundbreaking Clinical Trial Reveals Lubiprostone Enhances Kidney Function
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