Zobrazeno 1 - 10
of 462
pro vyhledávání: '"Sá, P. M."'
Binary population synthesis (BPS) is an essential tool for extracting information about massive binary evolution from gravitational-wave (GW) detections of compact object mergers. It has been successfully used to constrain the most likely permutation
Externí odkaz:
http://arxiv.org/abs/2410.11830
We perform a first study of the impact of varying two components of the initial conditions in binary population synthesis of compact binary mergers - the initial mass function, which is made metallicity- and star formation rate-dependent, and the orb
Externí odkaz:
http://arxiv.org/abs/2410.01451
In this article, we investigate a coupled phantom dark-energy cosmological model in which the coupling term between a phantom scalar field with an exponential potential and a pressureless dark-matter fluid is motivated by the warm inflationary paradi
Externí odkaz:
http://arxiv.org/abs/2407.15804
Publikováno v:
Universe 2024, 10(7), 271
In this work, we discuss the de Sitter swampland conjectures in the context of the generalized Chaplygin-inspired inflationary model. We demonstrate that these conjectures can be satisfied, but only in the region of the parameter space far away from
Externí odkaz:
http://arxiv.org/abs/2402.19051
Autor:
Horvath, J. E., de Sá, Lucas M., Rocha, Lívia S., Chinen, Gustavo Y., Barão, Lucas G., de Avellar, Márcio G. B.
We address in this work the nature and evolution of the long-period compact star sources, which has recently added several unexpected members. The central hypothesis is that particle winds drive their evolution, being an important factor for these re
Externí odkaz:
http://arxiv.org/abs/2402.06866
Autor:
Rocha, Lívia S., Horvath, Jorge E., de Sá, Lucas M., Chinen, Gustavo Y., Barão, Lucas G., de Avellar, Marcio G. B.
Matter at ultra-high densities finds a physical realization inside neutron stars. One key property is their maximum mass, which has far-reaching implications for astrophysics and the equation of state of ultra dense matter. In this work, we employ Ba
Externí odkaz:
http://arxiv.org/abs/2312.13244
Autor:
Sá, Paulo M.
Publikováno v:
Universe 2024, 10(8), 324
We investigate a coupled quintessence cosmological model in which a dark-energy scalar field with an exponential potential interacts directly with a dark-matter fluid through a dissipative term inspired by warm inflation. The evolution equations of t
Externí odkaz:
http://arxiv.org/abs/2312.09171
Autor:
Horvath, J. E., Rocha, L. S., de Sá, L. M., Moraes, P. H. R. S., Barão, L. G., de Avellar, M. G. B., Bernardo, A., Bachega, R. R. A.
Context: Recently, Doroshenko and collaborators reported a very low-mass compact star, a Central Compact Object named XMMU J173203.3-344518 inside the supernova remnant HESS J1731-347. Its tiny mass is at odds with all calculations of minimum masses
Externí odkaz:
http://arxiv.org/abs/2303.10264
Autor:
de Sá, L. M., Bernardo, A., Bachega, R. R. A., Rocha, L. S., Moraes, P. H. R. S., Horvath, J. E.
The study of compact object populations has come a long way since the determination of the mass of the Hulse-Taylor pulsar, and we now count on more than 150 known Galactic neutron stars and black hole masses, as well as another 180 objects from bina
Externí odkaz:
http://arxiv.org/abs/2301.07780
We discuss, in the context of alternative theories of gravity with nonminimal coupling between matter and curvature, if inflationary solutions driven by a single scalar field can be reconciled with the swampland conjectures about the emergence of de
Externí odkaz:
http://arxiv.org/abs/2301.02109