Jaime Román-Garza

Jaime Román-Garza
Universidad de Monterrey

Master of Science

About

21
Publications
4,737
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141
Citations

Publications

Publications (21)
Preprint
Full-text available
Most massive stars are members of a binary or a higher-order stellar systems, where the presence of a binary companion can decisively alter their evolution via binary interactions. Interacting binaries are also important astrophysical laboratories for the study of compact objects. Binary population synthesis studies have been used extensively over...
Article
Long-duration gamma-ray bursts are thought to be associated with the core-collapse of massive, rapidly spinning stars and the formation of black holes. However, efficient angular momentum transport in stellar interiors, currently supported by asteroseismic and gravitational-wave constraints, leads to predominantly slowly-spinning stellar cores. Her...
Article
Stripped-envelope supernovae (Types IIb, Ib, and Ic) that show little or no hydrogen comprise roughly one-third of the observed explosions of massive stars. Their origin and the evolution of their progenitors are not yet fully understood. Very massive single stars stripped by their own winds (≳25−30 M ⊙ at solar metallicity) are considered viable p...
Preprint
Long gamma-ray bursts are associated with the core-collapse of massive, rapidly spinning stars. However, the believed efficient angular momentum transport in stellar interiors leads to predominantly slowly-spinning stellar cores. Here, we report on binary stellar evolution and population synthesis calculations, showing that tidal interactions in cl...
Preprint
Full-text available
Stripped-envelope supernovae (Type IIb, Ib, Ic) showing little or no hydrogen are one of the main classes of explosions of massive stars. Their origin and the evolution of their progenitors are not fully understood as yet. Very massive single stars stripped by their own winds ($\gtrsim 25-30 M_{\odot}$ at solar metallicity) are considered viable pr...
Article
Recent 1D core-collapse simulations indicate a nonmonotonicity of the explodability of massive stars with respect to their precollapse core masses, which is in contrast to commonly used prescriptions. In this work, we explore the implications of these results on the formation of coalescing black hole (BH)-neutron star (NS) binaries. Furthermore, we...
Article
We study the impact of mass-transfer physics on the observable properties of binary black hole populations that formed through isolated binary evolution. We used the POSYDON framework to combine detailed MESA binary simulations with the COSMIC population synthesis tool to obtain an accurate estimate of merging binary black hole observables with a s...
Preprint
Full-text available
Recent detailed 1D core-collapse simulations have brought new insights on the final fate of massive stars, which are in contrast to commonly used parametric prescriptions. In this work, we explore the implications of these results to the formation of coalescing black-hole (BH) - neutron-star (NS) binaries, such as the candidate event GW190426_15215...
Preprint
Full-text available
We study the impact of mass-transfer physics on the observable properties of binary black hole populations formed through isolated binary evolution. We investigate the impact of mass-accretion efficiency onto compact objects and common-envelope efficiency on the observed distributions of $\chi_{eff}$, $M_{chirp}$ and $q$. We find that low common en...
Article
Full-text available
In this paper, we propose a new phenomenological two parameter parameterization of q(z) to constrain barotropic dark energy models by considering a spatially flat Universe, neglecting the radiation component, and reconstructing the effective equation of state (EoS). This two free-parameter EoS reconstruction shows a non-monotonic behavior, pointing...
Poster
Full-text available
En este trabajo exploramos la descripción geométrica del espacio-tiempo y las teorías de gravedad modifica-da como una potencial solución a la expansión acelerada del Universo en la actualidad. Despues de derivar el modelo cosmologico estándar, i.e. ΛCDM, consideraremos un caso particular de las teorías de gravedad modificada del tipo f (R). Al con...
Poster
Full-text available
En este trabajo presentamos algunas vías para modificar las ecuaciones de campo de Einstein con el objetivo de modelar la expansión acelerada del Universo en la actualidad. Considerando la formulación geométrica y variacional de la relatividad general se exploran las vías de modificación a esta teoría y las consecuencias en la evolución dinámica de...
Poster
Full-text available
Primero se expone el elemento de línea propuesto por Friedmann-Robertson-Walker para un universo isotrópico y homogéneo, con éste se obtiene la métrica y a su vez, la solución a las ecuaciones de campo de Einstein. En los resultados se gráfica el factor de Hubble comparándolo con los resultados observacionales, de esta forma se encuentra la necesid...
Poster
Full-text available
En el presente artículo se darán a conocer los conceptos de geometría Riemanniana necesarios para llegar a las ecuaciones de campo de Einstein, comenzado por la definición de un concepto que será fundamental para el entendimiento de dichas ecuaciones, los tensores, que son funciones multilineales. Posteriormente se mostraran los objetos como el ten...
Poster
Full-text available
En el presente artículo se darán a conocer los conceptos de geometría Riemanniana necesarios para llegar a las ecuaciones de campo de Einstein, comenzado por la definición de un concepto que será fundamental para el entendimiento de dichas ecuaciones, los tensores, que son funciones multilineales. Posteriormente se mostraran los objetos como el ten...
Poster
Full-text available
En este trabajo planteamos cómo las ecuaciones de campo de Einstein tuvieron que ser modificadas para explicar la expansión acelerada del Universo. Esta modificación es la base del modelo cosmológico estándar que incluye la constante cosmológica (Λ), que se obtuvo para explicar la expansión acelerada del cosmos. Además, se mostrará una de las inter...
Preprint
Full-text available
Estos apuntes son material complementario al estudio de la relatividad general. No se presenta material nuevo, solo una estructura que, desde el punto de vista del autor, es óptima para acercarse por primera vez a la geometría Riemanniana y la relatividad general. En este texto se parte desde conceptos básicos del álgebra lineal y se introducen aqu...
Preprint
Full-text available
In this paper, we propose a new phenomenological two parameter parametrization of $q(z)$ to constrain barotropic dark energy models by considering a spatially flat FRW universe, neglecting the radiation component, and reconstructing the effective equation of state (EoS). This two free-parameter EoS reconstruction shows a non-monotonic behavior, poi...
Preprint
Full-text available
In this paper, we propose a new phenomenological two parameter parametriza-tion of q(z) to constrain barotropic dark energy models by considering a spatially flat FRW universe, neglecting the radiation component, and reconstructing the effective equation of state (EoS). This two free-parameter EoS reconstruction shows a non-monotonic behavior, poin...
Preprint
Full-text available
In this paper, we propose a new phenomenological two parameter parametriza-tion of q(z) to constrain barotropic dark energy models by considering a spatially flat FRW universe, neglecting the radiation component, and reconstructing the effective equation of state (EoS). This two free-parameter EoS reconstruction shows a non-monotonic behavior, poin...
Poster
Full-text available
En este trabajo presentamos algunas vías para modificar las ecuaciones de campo de Einstein con el objetivo de modelar la expansión acelerada del Universo en la actualidad. Considerando la formulación geométrica y variacional de la relatividad general se exploran las vías de modificación a esta teoría y las consecuencias en la evolución dinámica de...

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Project (1)
Project
Have a first approach to modified gravity theories.