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Sunday, March 24, 2013

PROBLEMS WITH THE HELIOSHEATH




In one of his science-fiction novels, Asimov wrote that the crew of a spaceship that for the first time reached the heliosheath (extreme region of Heliopause, where solar wind is slowed, compressed and becomes turbulent by its interaction with the interstellar space: IS), lost consciousness for hours, while simultaneously the ship suffered mechanical and electrical disturbances. So, Asimov condensed, the consequences of the collision of the ship against a kind of wall, which we now know has a teardrop shape and is composed of millions of bubbles, which set a limit between the Heliopause and the interstellar magnetic field. The Heliosheath is the limit of solar influence, where solar wind opposes the interstellar medium or stellar wind from other stars, as evidenced by a loss of solar wind pressure, caused by inherent  dispersion, where solar and pressures of IS, become equivalent.

Regarding to IS, NASA's IBEX has shown within it: ordinary matter, neutral atoms (H, He, O, Neon), ionized atoms, molecules, dust and cosmic radiation (energy), wrapped in a magnetic field. The junction between Heliopause and IS, according to the IBEX is a region that slows and reduces hazardous ion entry into our solar system, phenomenon that causes directional ionic changes inducing magnetic chaos. It is stated that the Voyager 1, has not yet entered to IS, for failure to detect persistent changes in the magnetic field direction of IS. Most scientists agree, however, that the ship has already reached the Heliopause (million km long), demonstrated by discrete energy oscillations recorded in the Voyager 1, induced by myriads of ions from nearby IS. There is no guarantee that a future manned spacecraft, be deeply affected when arriving in the Heliosheath.

PROBLEMAS CON LA HELIOFUNDA

En una de sus novelas de ciencia-ficcion, Asimov relata que los tripulantes de una nave espacial que por primera vez alcanzaba la Heliofunda (región extrema de la Heliopausa, donde el viento solar se enlentece, comprime y torna turbulento, por su interaccion con el espacio interestelar:EI), perdian el conocimiento por horas, mientras simultaneamente la nave sufria trastornos mecanicos y eléctricos. Condensaba asi Asimov, las consecuencias de la colision de la nave contra una suerte de muro, del que hoy sabemos tiene forma de lagrima y se compone de millones de burbujas, que establecen un limite entre la Heliopausa y el campo magnetico interestelar. La Heliofunda, es el limite de la influencia solar, donde el viento solar se opone al medio interestelar, o al viento estelar procedente de otras estrellas, evidenciada por una pérdida de presión del viento solar, ocasionada por la dispersión inherente a su difusión, donde las presiones solar y la del EI, se tornan equivalentes.

Respecto al EI, la sonda IBEX de la NASA, ha demostrado en el : materia ordinaria, atomos neutralizados (H, He, O, Neon) e ionizados, moléculas, polvo y radiación cósmica (energía), envuelta en un campo magnetico. El punto de unión entre la Heliopausa y el EI, según datos del IBEX es una región donde se enlentece y disminuye la entrada de iones peligrosos a nuestro sistema solar, fenomeno que al inducir cambios ionicos direccionales ocasiona caos magnetico. Se afirma que el Voyager 1, aun no ha ingresado al EI, por no haberse detectado cambios persistentes en la dirección del campo magnetico del EI. La mayoria de científicos acepta no obstante que la nave ya alcanzo la Heliopausa (millones de Km de extensión), demostrada por discretas oscilaciones energéticas registradas en el Voyager 1, inducidas por miríadas de iones procedentes del cercano EI. Nada garantiza que una futura nave espacial humana tripulada, sea profundamente afectada al arribar a la Heliofunda.

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