Zobrazeno 1 - 10
of 7 245
pro vyhledávání: '"Jiménez, José A."'
We compute the evolution of linear perturbations on top of a background solution of a general nonlinear electromagnetic theory. This evolution can be described in terms of two effective metrics, and we analyse under what conditions they are conformal
Externí odkaz:
http://arxiv.org/abs/2411.07898
The increasing quality of cosmological data has revealed some tensions that could be signalling the necessity of incorporating new physics into our cosmological model. One particularly intriguing possibility is the existence of elastic interactions b
Externí odkaz:
http://arxiv.org/abs/2410.18645
We investigate the behavior of the dense and cold (normalized) QCD trace anomaly, $\Delta$, in the interior of twin neutron stars (obtained from several sets of equations of state in agreement with modern compact-star and multimessenger data) satisfy
Externí odkaz:
http://arxiv.org/abs/2408.11614
Scalar field theories with a shift symmetry come equipped with the $K$-mouflage (or kinetic screening) mechanism that suppresses the scalar interaction between massive objects below a certain distance, the screening radius. In this work, we study the
Externí odkaz:
http://arxiv.org/abs/2407.08627
Autor:
Xu, Mingyu, Jimenez, Jose L. Gonzalez, Jose, Greeshma C., Boonkird, Artittaya, Xing, Chengkun, Harrod, Chelsea, Li, Xinle, Zhou, Haidong, Gaiser, Alyssa, Ke, Xianglin, Bi, Wenli, Li, Mingda, Xie, Weiwei
The investigation of crystallographic, electronic, and magnetic characteristics, especially the mixed valences of Eu$^{2+}$ and Eu$^{3+}$ under pressure of a novel europium-based bismuth selenide compound, Eu$_4$Bi$_6$Se$_{13}$, presented. This new c
Externí odkaz:
http://arxiv.org/abs/2407.00163
Autor:
Bello-Morales, Antonio G., Jiménez, Jose Beltrán, Cano, Alejandro Jiménez, Maroto, Antonio L., Koivisto, Tomi S.
Theories formulated in the arena of teleparallel geometries are generically plagued by ghost-like instabilities or other pathologies that are ultimately caused by the breaking of some symmetries. In this work, we construct a class of ghost-free theor
Externí odkaz:
http://arxiv.org/abs/2406.19355
Autor:
Montaguth, Gissel P., Monachesi, Antonela, Torres-Flores, Sergio, Gómez, Facundo A., Lima-Dias, Ciria, Cortesi, Arianna, de Oliveira, Claudia Mendes, Telles, Eduardo, Panda, Swayamtrupta, Grossi, Marco, Lopes, Paulo A. A., O'Mill, Ana Laura, Hernandez-Jimenez, Jose A., Olave-Rojas, D. E., Demarco, Ricardo, Kanaan, Antonio, Ribeiro, Tiago, Schoenell, William
Compact groups (CGs) of galaxies are extreme environments for morphological transformations and the cessation of star formation. Our objective is to understand the dynamics of CGs and how their surrounding environment impacts galaxy properties. We se
Externí odkaz:
http://arxiv.org/abs/2406.14671
This work is devoted to study the relation between regularity and decay for solutions of the two-dimensional modified Zakharov-Kuznetsov equation in the weighted Sobolev spaces $Z_{s,(r_1,r_2)}:=H^s(\R^2)\cap L^2((1+|x|^{2r_1}+|y|^{2r_2})dxdy)$.
Externí odkaz:
http://arxiv.org/abs/2405.19526
Autor:
Olave-Rojas, Daniela E., Hernandez-Jimenez, José A., Torres-Flores, Sergio, Mora, Marcelo D., Firpo, Veronica
Publikováno v:
A&A 687, A33 (2024)
We study the properties of one of the most luminous hinge clumps, located on the compact group of galaxies NGC6845. Using IFS from GMOS/Gemini, complemented with archival MUSE data, we obtain oxygen abundances, ages, star formation rates, velocity fi
Externí odkaz:
http://arxiv.org/abs/2404.11549
Autor:
Fernández-Calatayud, Fernando, Coto-Elena, Lucía, Alejo, David, Carpio-Jiménez, José J., Caballero, Fernando, Merino, Luis
The ARS 548 RDI Radar is a premium model of the fifth generation of 77 GHz long range radar sensors with new RF antenna arrays, which offer digital beam forming. This radar measures independently the distance, speed and angle of objects without any r
Externí odkaz:
http://arxiv.org/abs/2404.04589