Hola amigos: AL VUELO DE UN QUINDE EL BLOG., la Agencia Espacial NASA, nos informa que: NASA's Interface Region Imaging Spectrograph (IRIS); ha proporcionado a los científicos con cinco nuevos hallazgos sobre cómo la atmósfera del Sol, o corona, se calienta mucho más caliente que su superficie, lo que causa constante flujo de salida del sol de partículas llamado viento solar, y qué mecanismos aceleran partículas que alimentan las erupciones solares....
La nueva información ayudará a los investigadores a entender mejor cómo nuestra energía transferencias estrella más cercana a través de su atmósfera y realizar un seguimiento de la actividad solar dinámico que puede afectar a la infraestructura tecnológica en el espacio y en la Tierra. Los detalles de los hallazgos aparecen en la edición actual de la Ciencia.
"Estos resultados revelan una región del Sol más complicado de lo que se pensaba anteriormente", dijo Jeff Newmark, director interino de la División de Heliofísica de la NASA en Washington. "La combinación de datos de IRIS con las observaciones de otras misiones Heliofísica está permitiendo grandes avances en nuestra comprensión del Sol y sus interacciones con el sistema solar."..........
"Estos resultados revelan una región del Sol más complicado de lo que se pensaba anteriormente", dijo Jeff Newmark, director interino de la División de Heliofísica de la NASA en Washington. "La combinación de datos de IRIS con las observaciones de otras misiones Heliofísica está permitiendo grandes avances en nuestra comprensión del Sol y sus interacciones con el sistema solar."..........
NASA’s Solar Dynamics Observatory provided the
outer image of a coronal mass ejection on May 9, 2014. The IRIS spacecraft. The
IRIS mission views the interface region that lies between the sun’s photosphere
and corona in unprecedented detail for researchers to study.
Image Credit:
NASA, Lockheed Martin Solar & Astrophysics
Laboratory
NASA's Interface Region Imaging Spectrograph (IRIS) has provided scientists
with five new findings into how the sun’s atmosphere, or corona, is heated far
hotter than its surface, what causes the sun’s constant outflow of particles
called the solar wind, and what mechanisms accelerate particles that power solar
flares.
The new information will help researchers better understand how our nearest
star transfers energy through its atmosphere and track the dynamic solar
activity that can impact technological infrastructure in space and on Earth.
Details of the findings appear in the current edition of Science.
"These findings reveal a region of the sun more complicated than previously
thought," said Jeff Newmark, interim director for the Heliophysics Division at
NASA Headquarters in Washington. "Combining IRIS data with observations from
other Heliophysics missions is enabling breakthroughs in our understanding of
the sun and its interactions with the solar system."
The first result identified heat pockets of 200,000 degrees Fahrenheit, lower
in the solar atmosphere than ever observed by previous spacecraft. Scientists
refer to the pockets as solar heat bombs because of the amount of energy they
release in such a short time. Identifying such sources of unexpected heat can
offer deeper understanding of the heating mechanisms throughout the solar
atmosphere.
For its second finding, IRIS observed numerous, small, low lying loops of
solar material in the interface region for the first time. The unprecedented
resolution provided by IRIS will enable scientists to better understand how the
solar atmosphere is energized.
A surprise to researchers was the third finding of IRIS observations showing
structures resembling mini-tornadoes occurring in solar active regions for the
first time. These tornadoes move at speeds as fast as 12 miles per second and
are scattered throughout the chromosphere, or the layer of the sun in the
interface region just above the surface. These tornados provide a mechanism for
transferring energy to power the million-degree temperatures in the corona.
Another finding uncovers evidence of high-speed jets at the root of the solar
wind. The jets are fountains of plasma that shoot out of coronal holes, areas
of less dense material in the solar atmosphere and are typically thought to be a
source of the solar wind.
The final result highlights the effects of nanoflares throughout the corona.
Large solar flares are initiated by a mechanism called magnetic reconnection,
whereby magnetic field lines cross and explosively realign. These often send
particles out into space at nearly the speed of light. Nanoflares are smaller
versions that have long been thought to drive coronal heating. IRIS observations
show high energy particles generated by individual nanoflare events impacting
the chromosphere for the first time.
"This research really delivers on the promise of IRIS, which has been looking
at a region of the sun with a level of detail that has never been done before,"
said De Pontieu, IRIS science lead at Lockheed Martin in Palo Alto, California.
"The results focus on a lot of things that have been puzzling for a long time
and they also offer some complete surprises."
IRIS is a Small Explorer mission managed by NASA’s Goddard Space Flight
Center, in Greenbelt, Maryland for the agency’s Science Mission Directorate at
NASA Headquarters. NASA's Ames Research Center in Moffett Field, California,
provides mission operations and ground data systems. The Norwegian Space Centre
is providing regular downlinks of science data. Lockheed Martin designed the
IRIS observatory and manages the mission for NASA. The Harvard-Smithsonian
Center for Astrophysics in Cambridge, Massachusetts, built the telescope.
Montana State University in Bozeman designed the spectrograph. Other
contributors for this mission include the University of Oslo and Stanford
University in Stanford, California.
For more information about IRIS, visit:
NASA
Guillermo Gonzalo Sánchez Achutegui
