Guillermo Torres
YOU?
Author Swipe
View article: 52 Eclipsing Quadruple Star Candidates Discovered in TESS Full Frame Images
52 Eclipsing Quadruple Star Candidates Discovered in TESS Full Frame Images Open
We present the discovery of 52 eclipsing quadruple star candidates detected in TESS Full Frame Image eleanor data by machine learning and citizen scientists. The uniformly vetted and validated targets exhibit two sets of eclipses following…
View article: Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas)
Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas) Open
We report new spectroscopic and interferometric observations of the Pleiades binary star Atlas, which played an important role nearly 3 decades ago in settling the debate over the distance to the cluster from ground-based and space-based d…
View article: Descriptive epidemiology of gastric cancer in Costa Rica from 1990 to 2022 and projection of deaths to 2050: a population-based study
Descriptive epidemiology of gastric cancer in Costa Rica from 1990 to 2022 and projection of deaths to 2050: a population-based study Open
The study was supported by the Agencia Costarricense de Investigaciones Biomédicas-Fundación INCIENSA.
View article: Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas)
Orbital and Physical Properties of the Pleiades Binary 27 Tau (Atlas) Open
We report new spectroscopic and interferometric observations of the Pleiades binary star Atlas, which played an important role nearly three decades ago in settling the debate over the distance to the cluster from ground-based and space-bas…
View article: Limb-darkening coefficients for four-term and power-2 laws for the JWST mission adopting spherical PHOENIX models at high resolution
Limb-darkening coefficients for four-term and power-2 laws for the JWST mission adopting spherical PHOENIX models at high resolution Open
Aims. Modeling observations of transiting exoplanets or close binary systems by comparing the observations with theoretical light curves requires precise knowledge of the distribution of specific intensities across the stellar disk. We aim…
View article: The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods
The Discovery of Two Quadruple Star Systems with the Second and Third Shortest Outer Periods Open
We present the discovery of two quadruple star systems—TIC 285853156 and TIC 392229331—each consisting of two bound eclipsing binary stars. Among the most compact quadruples known, TIC 392229331 and TIC 285853156 have the second and third …
View article: A transiting multiplanet system in the 61 Myr old association Theia 116
A transiting multiplanet system in the 61 Myr old association Theia 116 Open
Observing and characterizing young planetary systems can aid in unveiling the evolutionary mechanisms that sculpt the mature exoplanet population. As an all-sky survey, NASA’s Transiting Exoplanet Survey Satellite (TESS) has expanded the k…
View article: Application of the essential oil of Ocimum Basilicum l. as a natural food conservative: antibacterial and nutraceutical potential
Application of the essential oil of Ocimum Basilicum l. as a natural food conservative: antibacterial and nutraceutical potential Open
Preservatives of natural origin have been gaining prominence due to the demand for healthier foods. Essential oils (EOs) have been studied as promising alternatives to prevent the colonization of pathogenic microorganisms in food. The EO o…
View article: Spectroscopic follow-up of candidate runaway stars
Spectroscopic follow-up of candidate runaway stars Open
Runaway stars are characterized by higher space velocities than typical field stars. They are presumed to have been ejected from their birth places by one or more energetic mechanisms, including supernova explosions. Accurate radial veloci…
View article: Spectroscopic Follow-Up of Candidate Runaway Stars
Spectroscopic Follow-Up of Candidate Runaway Stars Open
Runaway stars are characterized by higher space velocities than typical field stars. They are presumed to have been ejected from their birth places by one or more energetic mechanisms, including supernova explosions. Accurate radial veloci…
View article: Short-period Heartbeat Binaries from TESS Full-frame Images
Short-period Heartbeat Binaries from TESS Full-frame Images Open
We identify 240 short-period ( P ≲ 10 days) binary systems in Transiting Exoplanet Survey Satellite data, 180 of which are heartbeat binaries. The sample is mostly a mix of A- and B-type stars and primarily includes eclipsing systems, wher…
View article: Absolute Dimensions of the Interferometric Binary HD 174881: A Test of Stellar Evolution Models for Evolved Stars
Absolute Dimensions of the Interferometric Binary HD 174881: A Test of Stellar Evolution Models for Evolved Stars Open
We report high-resolution spectroscopic monitoring and long-baseline interferometric observations with the Palomar Testbed Interferometer (PTI) of the 215 day binary system HD 174881 (K1 II-III), composed of two giant stars. The system is …
View article: Absolute Dimensions of the Interferometric Binary HD 174881: A Test of Stellar Evolution Models for Evolved Stars
Absolute Dimensions of the Interferometric Binary HD 174881: A Test of Stellar Evolution Models for Evolved Stars Open
We report high-resolution spectroscopic monitoring and long-baseline interferometric observations with the PTI of the 215-day binary system HD 174881 (K1 II-III), composed of two giant stars. The system is spatially resolved with the PTI, …
View article: Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster
Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster Open
We report long-baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 2838…
View article: The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array
The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array Open
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021. An additional measurement has been made with speckle interferometry at the…
View article: A transiting multi-planet system in the 61 million year old association Theia 116
A transiting multi-planet system in the 61 million year old association Theia 116 Open
Observing and characterizing young planetary systems can aid in unveiling the evolutionary mechanisms that sculpt the mature exoplanet population. As an all-sky survey, NASA's Transiting Exoplanet Survey Satellite (TESS) has expanded the k…
View article: On Finding the Closest Zonotope to a Polytope in Hausdorff Distance
On Finding the Closest Zonotope to a Polytope in Hausdorff Distance Open
We provide a local theory for the optimization of the Hausdorff distance between a polytope and a zonotope. To do this, we compute explicit local formulae for the Hausdorff function $d(P, -) : Z_n \to \mathbb{R}$, where $P$ is a fixed poly…
View article: The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array
The Orbit and Dynamical Mass of Polaris: Observations with the CHARA Array Open
The 30 year orbit of the Cepheid Polaris has been followed with observations by the CHARA Array (Center for High Angular Resolution Astronomy) from 2016 through 2021. An additional measurement has been made with speckle interferometry at t…
View article: KIC 4150611: A quadruply eclipsing heptuple star system with a <i>g</i>-mode period-spacing pattern
KIC 4150611: A quadruply eclipsing heptuple star system with a <i>g</i>-mode period-spacing pattern Open
Context. KIC 4150611 is a high-order multiple composed of a triple system. It comprises: (1) a F1V primary (Aa) that is eclipsed on a 94.2d period by a tight 1.52d binary composed of two dim K/M dwarfs (Ab1 and Ab2), which also eclipse eac…
View article: KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis
KIC 4150611: A quadruply eclipsing heptuple star system with a g-mode period-spacing pattern Eclipse modelling of the triple and spectroscopic analysis Open
KIC 4150611 is a high-order multiple composed of a triple system composed of the F1V primary (Aa), which is eclipsed on a 94.2d period by a tight 1.52d binary composed of two dim K/M dwarfs (Ab1, Ab2), which also eclipse each other; an 8.6…
View article: Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster
Orbits and Dynamical Masses for Six Binary Systems in the Hyades Cluster Open
We report long baseline interferometric observations with the CHARA Array that resolve six previously known double-lined spectroscopic binary systems in the Hyades cluster, with orbital periods ranging from 3 to 358 days: HD 27483, HD 2838…
View article: Searching for OB-type pre-supernova binary companions inside supernova remnants
Searching for OB-type pre-supernova binary companions inside supernova remnants Open
We searched for OB-runaway stars inside supernova remnants (SNRs) as a pre-supernova binary companion. As the majority of massive stars are found in close binary systems, a runaway star ejected by the orbital energy after the supernova (SN…
View article: Revisiting the warm sub-Saturn TOI-1710b
Revisiting the warm sub-Saturn TOI-1710b Open
The Transiting Exoplanet Survey Satellite (TESS) provides a continuous suite of new planet candidates that need confirmation and precise mass determination from ground-based observatories. This is the case for the G-type star TOI-1710, whi…
View article: Revisiting the warm sub-Saturn TOI-1710b
Revisiting the warm sub-Saturn TOI-1710b Open
The Transiting Exoplanet Survey Satellite (TESS) provides a continuous suite of new planet candidates that need confirmation and precise mass determination from ground-based observatories. This is the case for the G-type star TOI-1710, whi…
View article: Dynamical Masses for the Hyades Binary System vB 120
Dynamical Masses for the Hyades Binary System vB 120 Open
We report spectroscopic observations of vB 120 (HD 30712), a 5.7 yr astrometric–spectroscopic binary system in the Hyades cluster. We combine our radial velocities with others from the literature, and with existing speckle interferometry m…
View article: Orbits and Dynamical Masses for the Active Hyades Multiple System HD 284163
Orbits and Dynamical Masses for the Active Hyades Multiple System HD 284163 Open
We report near-infrared long-baseline interferometric observations of the Hyades multiple system HD 284163, made with the CHARA array, as well as almost 43 yr of high-resolution spectroscopic monitoring at the CfA. Both types of observatio…
View article: Orbits and dynamical masses for the active Hyades multiple system HD 284163
Orbits and dynamical masses for the active Hyades multiple system HD 284163 Open
We report near-infrared long-baseline interferometric observations of the Hyades multiple system HD 284163, made with the Center for High Angular Resolution Astronomy array, as well as almost 43 yr of high-resolution spectroscopic monitori…