Zobrazeno 1 - 10
of 2 083
pro vyhledávání: '"Díaz A I"'
In this work, we derive a generalized modified Friedmann equation based on an entropy-area relation that incorporates established modifications, such as volumetric, linear, and logarithmic terms, in addition to novel entropic modifications that might
Externí odkaz:
http://arxiv.org/abs/2412.11260
Autor:
Nikitin, S. E., Xie, Tao, Gazizulina, A., Ouladdiaf, B., Velamazán, J. A. Rodríguez, Díaz-Ortega, I. ~F., Nojiri, H., Anovitz, L. M., Santos, A. M. dos, Prokhnenko, O., Podlesnyak, A.
We report the direct observation of a commensurate-ordered antiferromagnetic (AFM) state but incommensurate helical spin dynamics in the natural mineral brochantite Cu$_4$SO$_4$(OH)$_6$ through neutron diffraction and neutron spectroscopy measurement
Externí odkaz:
http://arxiv.org/abs/2407.12767
Physical properties of circumnuclear ionising clusters. III. Kinematics of gas and stars in NGC 7742
In this third paper of a series, we study the kinematics of the ionised gas and stars, calculating the dynamical masses of the circumnuclear star-forming regions in the ring of of the face-on spiral NGC 7742. We have used high spectral resolution dat
Externí odkaz:
http://arxiv.org/abs/2404.02303
Autor:
Cavichia, O., Mollá, M., Bazán, J. J., Castrillo, A., Galbany, L., Millán-Irigoyen, I., Ascasibar, Y., Díaz, A. I, Monteiro, H.
The role of type Ia supernovae (SN Ia), mainly the Delay Time Distributions (DTDs) determined by the binary systems, and the yields of elements created by different explosion mechanisms, are studied by using the MulChem chemical evolution model appli
Externí odkaz:
http://arxiv.org/abs/2311.00076
We apply Wald's formalism to a Lagrangian within generalised Proca gravity that admits a Schwarzschild black hole with a non-trivial vector field. The resulting entropy differs from that of the same black hole in General Relativity by a logarithmic c
Externí odkaz:
http://arxiv.org/abs/2310.20114
Autor:
Zamora, S., Díaz, Ángeles I.
Circumnuclear star forming regions (CNSFR) are massive clusters found close to galactic nuclei. These entities give us an excellent opportunity to study star formation in environments with high metallicity and to relate it with active galactic nuclei
Externí odkaz:
http://arxiv.org/abs/2310.12895
Autor:
Zamora, S., Díaz, A. I.
Cross-correlation techniques have been used since 1974 for measuring velocity shifts and velocity dispersions from stellar and nebular spectra and, since 1979, the analysis based on the Fourier Method has been applied. However, we are currently obtai
Externí odkaz:
http://arxiv.org/abs/2310.04133
In this paper we study the viability of an entropic cosmological model. The effects of entropic gravity are derived from a modified entropy-area relationship with a volumetric entropy term. This model describes a late time limit cosmic acceleration,
Externí odkaz:
http://arxiv.org/abs/2305.01607
Publikováno v:
Phys. Rev. B 107, 195148 (2023)
Motivated by the resistive switchings in transition-metal oxides (TMOs) induced by a voltage bias, we study the far-from-equilibrium dynamics of an electric-field-driven strongly-correlated model featuring a first-order insulator-to-metal transition
Externí odkaz:
http://arxiv.org/abs/2209.02758
The logarithmic extinction coefficient, c(H$\beta$), is usually derived using the H$\alpha$/H$\beta$ ratio for case B recombination and assuming standard values of electron density and temperature. However, the use of strong Balmer lines can lead to
Externí odkaz:
http://arxiv.org/abs/2208.00669