(1829 - 1888)
Químico fisiólogo, agrónomo y tecnólogo industrial. Se le considera Padre de la Agricultura Científica Cubana. Su obra cumbre, Ensayo sobre el cultivo de la caña de azúcar, se tradujo a varios idiomas y es considerada la principal obra escrita sobre esta gramínea.
Natural and Exact Sciences
1999 | Characterization of Coronal Mass Emissions (C.M.E.)
Main author: Ramón E. Rodríguez Taboada, Adolfo Méndez Berhondo y Giselle Gil Moreno.
Summary:

This research was carried out for many years by a group of Cuban researchers from the Institute of Geophysics and Astronomy (IGA) that has given rise to new results in solar astrophysics, and which is mainly based on:

  • the observation of fluctuations associated to solar sparkles;
  • many observations about plasm ejections from the solar crown and associate events, subject that has a particular importance during the last years. These ejections spread through the interplanetary space dragging their own magnetic field, and in their movement they can be crossed by the Earth and other planets;
  • the observation of solar cosmic rays.

The most novel contributions:

  • The micro-waves fluctuations observed in a solar sparkle suggest that the magnetic structure of the active solar region where the sparkle takes place, is not essentially modified by this. This result was published in the International Geophysical magazine, published by the UNAM;
  • From the data taken by CUBA station and a group of more general catalogues published by authors from many countries, it was created an essentially new catalogue of 163 crown mass ejections (CME) in which, among other things, CME of multiple components are discovered. There is not a similar compilation available to the scientific community, both for astrophysical and interdisciplinary researches, (for instance, the influence of solar activity on the biosphere);
  • It was evidenced the association of CME to "calm" formations, that is to say, they obey mechanisms which are different from solar explosions, contrarily to what has been previously affirmed by many authors. In other words, it was showed that CME generally precede explosions, and cannot be their consequence. It was evidenced that CME plays an important role in the Sun's energy balance, that crown mass associated to CME moves as a whole, and that it is based on a mechanism in which accelerated particles are not produced;
  • There were some arguments in favor of the idea that cosmic ray emissions are caused by different mechanisms in different energy intervals: when researching the dynamics a of magnetized solar plasm cloud associated to a CME, it is reached the conclusion that solar cosmic rays of high energy come from a solar source, while those of low energy arrive to the Earth with disturbance (plasm cloud).