M. L. Rojas Kaufmann, M. Bersten
Physical parameters of Supernovae 1987A. The particular case of SN 2009mw
The vast majority of Type II supernovae (SNeII) are produced by red supergiant stars. Althoug in 1987 a different SN appeared, the SN 1987A, wich came from a blue supergiant star with particularities in its light curve that place it in a new group within the SNeII. This group is called 1987A-like SNe. In this work we show optical photometric and spectroscopic observations of the 1987A-like SN 2009mw. We present an analysis of how the variation of physical parameters (like the mass and radius of the progenitor star, the explosion energy and the amount ofradioactive material) impacts on the modelized light curves of these kind of objects and the particular case of the 1987A-like SN 2009mw.
Alicia Moranchel Basurto
Origin of the bilateral structure of the supernova remnant G296.5+10
We have modeled the supernova remnant (SNR) G296.5+10, by means of 3D magnetohydrodynamics (MHD) simulations. This remnant belongs to the bilateral SNR group and it has an additional stricking feature: the rotation measure (RM) in its eastern and western parts are very different. In order to explain both the morphology observed in radio-continuum and the RM, we consider that the remnant expands in a medium where the magnetic field of the progenitor star is added to a constant galactic magnetic field. Also we have carried out a polarization study, obtaining synthetic maps of the linearly polarized intensity and the Stokes parameters, from our MHD results. This study reveals that both radio morphology and the reported RM for this remnant can be explained if the quasiparallel acceleration mechanism is taking place in the shock front of SNR G296.5+10.
Raúl Ortega Chametla
Gap opening criterion in locally isothermal tree-dimensional discs by inclined massive planets
We study the gravitational interaction of a Jupiter mass planet with its gaseous protoplanetary disc. The planet's orbit is circular and inclined relative to the midplane of the disc. We use the impulsive approximation to estimate the gravitational tidal torque between the planet and the disc, and infer the gap profile. In addition, we simulate the disc response to an inclined massive planet using the FARGO3D code. For low-mass discs, we provide a criterion for gap opening when the orbital inclination is less to 30 degrees. This study may be useful to understand the planetary migration of massive planets on inclined orbit.
Annabella Mondino Llermanos
Effects of collisions and accretion in a rings of particles
We have performed numerical simulations using N-body codes to study the dynamics within the frame of Saturn Rings. Several simulations have been carried out in order to better understand the effect of collisions as well as accretional evolution in this environment. These kind of studies are necessary to understand underlying physical processes and to connect them to the observations in terms of computer simulations.
Valeria Sieyra
The Argentine science and technology crisis
In 2017, the science and technology (S&T) sector suffered a 9% budget cut, reaching the historical minimum of 0.59% of the national budget. In this complex economic and political context, we present a detailed chronology of recent events and describe the inner structure and functionality of the S&T sector. Short and long-term consequences of this defunding policy, such as loss of jobs, dismantling of workgroups and complete disappearance of research lines are discussed.