Universe, Volume 11, Issue 10

This study investigates three distinct charged gravastar models within the framework of fT modified gravity, considering the functional forms fT=T, fT=a+bT, and fT=T2. Inspired by the Mazur–Mottola conjecture, we propose these models as singula...

Understanding the diversity of star formation histories (SFHs) of galaxies is key to reconstructing their evolutionary paths. Traditional models often assume parametric forms such as delayed-τ or exponentially declining models, which may not refl...

We perform a systematic investigation of low-lying singly charmed dibaryon systems with J=1, I=0,12,1,32,2,52 and strangeness S=−1,−2,−3,−4,−5 in the chiral quark model. According to the analysis of effective potentials,...

In the framework of the quasigroup approach to conservation laws in general relativity, we show how the infinite-parametric Newman–Unti group of asymptotic symmetries can be reduced to the Poincaré quasigroup. We compute Noether’s...

Comets are chemically rich and thermally extreme, spanning surface temperatures from ~50 K in the Oort Cloud to >1000 K for sungrazing bodies. These conditions may support key steps of prebiotic chemistry, including the synthesis of nucleic acid p...

The anti-correlation between the equivalent width of the neutral narrow Fe Kα line and the 2–10 keV luminosity (the Iwasawa–Taniguchi effect) in the nuclear regions of active galactic nuclei has been debated in recent years. With th...

Various authors have suggested that Kaluza–Klein variants of traversable wormholes might to some extent ameliorate the defocussing properties (the curvature condition violations, and implied energy condition violations) inherent in positing the...

If the recent acceleration phase of the expanding Universe is driven by a cosmologicalconstant the Universe is future-eternal with a few far reaching ramifications and disturbing consequences. We demonstrate with a non-ΛCDM cosmological model,...

The recent discovery of an extremely light and small central compact object (CCO) within the supernova remnant HESS J1731-347, with mass 0.77−0.17+0.20M⊙ and radius 10.4−0.78+0.86 km, is challenging our understanding of neutron star...

The mass profile of the central galaxy of the Antlia cluster, NGC 3268, is studied through a spherical Jeans analysis, combined with a Bayesian approach. The prior distributions are derived from dark matter simulations. The observational dataset cons...