Hola amigos; A VUELO DE UN QUINDE EL BLOG., Un equipo de científicos usando el Telescopio Espacial Hubble de la NASA ha hecho el mapa global más detallado de la luz de un planeta turbulento fuera del sistema solar, que revela sus secretos de las temperaturas del aire y vapor de agua.
Observaciones del Hubble muestran el exoplaneta, llamado WASP-43b, hay lugar para llamar a casa. Es un mundo de extremos, donde los vientos hirvientes aúllan a la velocidad del sonido a partir de un lado de "día" 3.000 grados Fahrenheit, lo suficientemente caliente como para fundir el acero, a un negro como la pez "noche" codo con hundiendo temperaturas por debajo de 1000 grados Fahrenheit .
Observaciones del Hubble muestran el exoplaneta, llamado WASP-43b, hay lugar para llamar a casa. Es un mundo de extremos, donde los vientos hirvientes aúllan a la velocidad del sonido a partir de un lado de "día" 3.000 grados Fahrenheit, lo suficientemente caliente como para fundir el acero, a un negro como la pez "noche" codo con hundiendo temperaturas por debajo de 1000 grados Fahrenheit .
Los astrónomos han trazado las temperaturas en diferentes capas de la atmósfera del planeta y rastreado la cantidad y distribución del vapor de agua. Los resultados tienen implicaciones para la comprensión de la dinámica atmosférica y cómo se forman los planetas gigantes como Júpiter.
"Estas medidas han abierto la puerta a un nuevo tipo de maneras de comparar las propiedades de los diferentes tipos de planetas", dijo el líder del equipo de Jacob haba de la Universidad de Chicago.
Descubierta por primera vez en 2011, WASP-43b se halla a 260 años luz de distancia. El planeta está demasiado lejos para ser fotografiado, pero debido a que su órbita se observa de canto a la Tierra, los astrónomos detectaron que observando caídas regulares a la luz de su estrella cuando el planeta pasa frente a ella.................
"Estas medidas han abierto la puerta a un nuevo tipo de maneras de comparar las propiedades de los diferentes tipos de planetas", dijo el líder del equipo de Jacob haba de la Universidad de Chicago.
Descubierta por primera vez en 2011, WASP-43b se halla a 260 años luz de distancia. El planeta está demasiado lejos para ser fotografiado, pero debido a que su órbita se observa de canto a la Tierra, los astrónomos detectaron que observando caídas regulares a la luz de su estrella cuando el planeta pasa frente a ella.................
This is a temperature map
of the "hot Jupiter" class exoplanet WASP 43b. The white-colored region on the
daytime side is 2,800 degrees Fahrenheit. The nighttime side temperatures drop
to under 1,000 degrees Fahrenheit.
Image Credit: NASA/ESA
A team of scientists using NASA’s Hubble Space Telescope has made the most
detailed global map yet of the glow from a turbulent planet outside our solar
system, revealing its secrets of air temperatures and water vapor.
Hubble observations show the exoplanet, called WASP-43b, is no place to call
home. It is a world of extremes, where seething winds howl at the speed of sound
from a 3,000-degree-Fahrenheit “day” side, hot enough to melt steel, to a
pitch-black “night” side with plunging temperatures below 1,000 degrees
Fahrenheit.
Astronomers have mapped the temperatures at different layers of the planet's
atmosphere and traced the amount and distribution of water vapor. The findings
have ramifications for the understanding of atmospheric dynamics and how giant
planets like Jupiter are formed.
“These measurements have opened the door for a new kinds of ways to compare
the properties of different types of planets,” said team leader Jacob Bean of
the University of Chicago.
First discovered in 2011, WASP-43b is located 260 light-years away. The
planet is too distant to be photographed, but because its orbit is observed
edge-on to Earth, astronomers detected it by observing regular dips in the light
of its parent star as the planet passes in front of it.
“Our observations are the first of their kind in terms of providing a
two-dimensional map on the longitude and altitude of the planet’s thermal
structure that can be used to constrain atmospheric circulation and dynamical
models for hot exoplanets,” said team member Kevin Stevenson of the University
of Chicago.
As a hot ball of predominantly hydrogen gas, there are no surface features on
the planet, such as oceans or continents that can be used to track its rotation.
Only the severe temperature difference between the day and night sides can be
used by a remote observer to mark the passage of a day on this world.
The planet is about the same size as Jupiter, but is nearly twice as dense.
The planet is so close to its orange dwarf host star that it completes an orbit
in just 19 hours. The planet also is gravitationally locked so that it keeps one
hemisphere facing the star, just as our moon keeps one face toward Earth.
This was the first time astronomers were able to observe three complete
rotations of any planet, which occurred during a span of four days. Scientists
combined two previous methods of analyzing exoplanets in an unprecedented
technique to study the atmosphere of WASP-43b. They used spectroscopy, dividing
the planet’s light into its component colors, to determine the amount of water
and the temperatures of the atmosphere. By observing the planet’s rotation, the
astronomers also were able to precisely measure how the water is distributed at
different longitudes.
Because there is no planet with these tortured conditions in our solar
system, characterizing the atmosphere of such a bizarre world provides a unique
laboratory for better understanding planet formation and planetary physics.
“The planet is so hot that all the water in its atmosphere is vaporized,
rather than condensed into icy clouds like on Jupiter,” said team member Laura
Kreidberg of the University of Chicago.
The amount of water in the giant planets of our solar system is poorly known
because water that has precipitated out of the upper atmospheres of cool gas
giant planets like Jupiter is locked away as ice. But so-called “hot Jupiters,”
gas giants that have high surface temperatures because they orbit very close to
their stars, water is in a vapor that can be readily traced.
“Water is thought to play an important role in the formation of giant
planets, since comet-like bodies bombard young planets, delivering most of the
water and other molecules that we can observe,” said Jonathan Fortney, a member
of the team from the University of California, Santa Cruz.
In order to understand how giant planets form astronomers want to know how
enriched they are in different elements. The team found that WASP-43b has about
the same amount of water as we would expect for an object with the same chemical
composition as our sun, shedding light on the fundamentals about how the planet
formed. The team next aims to make water-abundance measurements for different
planets.
The results are presented in two new papers, one published online in Science
Express Thursday and the other published in The Astrophysical Journal Letters on
Sept. 12.
The Hubble Space Telescope is a project of international cooperation between
NASA and the European Space Agency. NASA's Goddard Space Flight Center in
Greenbelt, Maryland manages the telescope. The Space Telescope Science Institute
(STScI) in Baltimore conducts Hubble science operations. STScI is operated for
NASA by the Association of Universities for Research in Astronomy, Inc., in
Washington.
For images and more information about Hubble, visit:
and
NASA
Guillermo Gonzalo Sánchez Achutegui
Incsríbete en el Foro del blog y participa : A Vuelo De Un Quinde - El Foro!
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