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2 papers
gr-qc2026★ 1 cited
The peculiar case of the Viaggiu holographic dark energy
Somnath Saha, Subhajit Saha, Nilanjana Mahata
We study the plausibility of a holographic dark energy (HDE) model using the form of horizon entropy proposed by Viaggiu in 2014. This form of entropy is a generalization of the us…
astro-ph.GA2026
Energy dependence of the X-ray power spectrum in NGC4051 and NGC4395
V. A. Diamantopoulos, I. E. Papadakis, A. Akylas +3
Active galactic nuclei (AGNs) exhibit strong variability across the electromagnetic spectrum on a wide range of timescales, particularly in X-rays where fluctuations are both rapid…