317 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidad Nacional de ColombiaCO9 papers
- University of Illinois Urbana-ChampaignUS9 papers
- University of TübingenDE9 papers
- Fudan UniversityCN8 papers
- Montana State UniversityUS5 papers
- Princeton UniversityUS4 papers
- National Center for Supercomputing ApplicationsUS3 papers
- Universidad de Los AndesCO3 papers
- University of AveiroPT3 papers
- Colegio de Estudios Superiores de AdministraciónCO2 papers
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech RepublicCZ2 papers
- Institute of Astrophysics and Space SciencesPT2 papers
37 papers
Slowly rotating covariant anisotropic objects
Philip Beltracchi, Camilo Posada
The equilibrium configurations of slowly rotating anisotropic self-gravitating fluids are computed using the extended Hartle structure equations, including anisotropic effects, der…
Slowly rotating anisotropic relativistic stars
Philip Beltracchi, Camilo Posada
The present paper is devoted to a study of the equilibrium configurations of slowly rotating anisotropic stars in the framework of general relativity. For that purpose, we provide…
Adaptive Analytical Ray Tracing of Black Hole Photon Rings
Alejandro Cárdenas-Avendaño, Alexandru Lupsasca, Hengrui Zhu
Recent interferometric observations by the Event Horizon Telescope have resolved the horizon-scale emission from sources in the vicinity of nearby supermassive black holes. Future…
New Horizons for Fundamental Physics with LISA
K. G. Arun, Enis Belgacem, Robert Benkel +138
The Laser Interferometer Space Antenna (LISA) has the potential to reveal wonders about the fundamental theory of nature at play in the extreme gravity regime, where the gravitatio…
Chaos in Quadratic Gravity
Alexander Deich, Alejandro Cárdenas-Avendaño, Nicolas Yunes
While recent gravitational wave observations by LIGO and Virgo allow for tests of general relativity in the extreme gravity regime, these observations are still blind to a large sw…
Spherical accretion in alternative theories of gravity
Adam Bauer, Alejandro Cárdenas-Avendaño, Charles F. Gammie +1
The groundbreaking image of the black hole at the center of the M87 galaxy has raised questions at the intersection of observational astronomy and black hole physics. How well can…
Blandford-Znajek Process in Quadratic Gravity
Jameson Dong, Nicolás Patiño, Yiqi Xie +3
The Blandford-Znajek process, which uses a magnetized plasma to extract energy from a rotating black hole, is one of the leading candidates for powering relativistic jets. In this…
Machine learning for assessing quality of service in the hospitality sector based on customer reviews
Vladimir Vargas-Calderón, Andreina Moros Ochoa, Gilmer Yovani Castro Nieto +1
The increasing use of online hospitality platforms provides firsthand information about clients preferences, which are essential to improve hotel services and increase the quality…
Towards robust and speculation-reduction real estate pricing models based on a data-driven strategy
Vladimir Vargas-Calderón, Jorge E. Camargo
In many countries, real estate appraisal is based on conventional methods that rely on appraisers' abilities to collect data, interpret it and model the price of a real estate prop…
A Decentralised Self-Healing Approach for Network Topology Maintenance
Arles Rodríguez, Jonatan Gómez, Ada Diaconescu
In many distributed systems, from cloud to sensor networks, different configurations impact system performance, while strongly depending on the network topology. Hence, topological…
Learning from students' perception on professors through opinion mining
Vladimir Vargas-Calderón, Juan S. Flórez, Leonel F. Ardila +3
Students' perception of classes measured through their opinions on teaching surveys allows to identify deficiencies and problems, both in the environment and in the learning method…
Modeling uncertainties in X-ray reflection spectroscopy measurements II: Impact of the radiation from the plunging region
Alejandro Cardenas-Avendano, Menglei Zhou, Cosimo Bambi
X-ray reflection spectroscopy is a powerful tool to probe the strong gravity region around black holes, but the available relativistic reflection models have a number of simplifica…
Astrophysical and theoretical physics implications from multimessenger neutron star observations
Hector O. Silva, A. Miguel Holgado, Alejandro Cárdenas-Avendaño +1
The Neutron Star Interior Composition Explorer (NICER) recently measured the mass and equatorial radius of the isolated neutron star PSR J0030+0451. We use these measurements to in…
Gravitational-wave versus X-ray tests of strong-field gravity
Alejandro Cardenas-Avendano, Sourabh Nampalliwar, Nicolas Yunes
Electromagnetic observations of the radiation emitted by an accretion disk around a black hole, as well as gravitational wave observations of coalescing binaries, can be used to pr…
A model for predicting price polarity of real estate properties using information of real estate market websites
Vladimir Vargas-Calderón, Jorge E. Camargo
This paper presents a model that uses the information that sellers publish in real estate market websites to predict whether a property has higher or lower price than the average p…
The Consistency of Trust-Sales Relationship in Latin-American E-commerce
Juan C. Correa, Henry Laverde-Rojas, Camilo A. Martinez +3
Customer's trust in vendors' reputation is a key factor that facilitates economic transactions in e-commerce platforms. Although the trust-sales relationship is assumed robust and…
Characterization of cell division control strategies through continuous rate models
Cesar Augusto Nieto-Acuna, Juan Carlos Arias-Castro, Carlos Arturo Sanchez-Isaza +2
Recent experiments have supported the Adder model for E. coli division control. This model posits that bacteria grow, on average, a fixed size before division. It also predicts dec…
Characterization of citizens using word2vec and latent topic analysis in a large set of tweets
Vargas-Calderón Vladimir, Camargo Jorge
With the increasing use of the Internet and mobile devices, social networks are becoming the most used media to communicate citizens' ideas and thoughts. This information is very u…
The trace form over cyclic number fields
Wilmar Bolaños, Guillermo Mantilla-Soler
In the mid 80's Conner and Perlis showed that for cyclic number fields of prime degree the isometry class of integral trace is completely determined by the discriminant. Here w…
Experimental Relativity with Accretion Disk Observations
Alejandro Cardenas-Avendano, Jaxen Godfrey, Nicolas Yunes +1
Electromagnetic observations have been used over the past decades to understand the nature of black holes and the material around them. Our ability to learn about the fundamental p…
Stealth Chaos due to Frame Dragging
Andrés F. Gutiérrez-Ruiz, Alejandro Cárdenas-Avendaño, Nicolás Yunes +1
While the geodesic motion around a Kerr black hole is fully integrable and therefore regular, numerical explorations of the phase-space around other spacetime configurations, with…
The exact dynamical Chern Simons metric for a spinning black hole possesses a fourth constant of motion: A Dynamical-Systems-Based Conjecture
Alejandro Cardenas-Avendano, Andres F. Gutierrez, Leonardo A. Pachon +1
The recent gravitational wave observations by the LIGO/Virgo collaboration have allowed the first tests of General Relativity in the extreme gravity regime, when comparable-mass bl…
The Sun and its educational spectrum
Alejandro Cardenas-Avendano, Santiago Vargas Dominguez, Freddy Moreno Cardenas +1
The aim of this paper is to encourage science educators and outreach groups to look appropriately at the Sun and consider it as an extraordinary pedagogical tool to teach science a…
On a characterization of path connected topological fields
Xavier Caicedo, Guillermo Mantilla-Soler
The aim of this paper is to give a characterization of path connected topological fields, inspired by the classical Gelfand correspondence between a compact Hausdorff topological s…