Una visión diferente para disfrutar de la magia del Universo
Astronomía - Cosmología - Astrofotografía - Astrofísica - Exploración Espacial

💫Nuevo!! Universo Mágico muestra los catálogos astronómicos más populares. Búscalos en la barra superior de navegación y lateral.

💫Los aficionados ya pueden escribir sobre astronomía. Date de alta como Autor en Universo Mágico Público.

 ðŸ’«Si eres Autor prueba la opción Nueva Entrada

💫Grupos en Facebook: Astroimaging - Stars in the Sky - Astronomy Plus - Astrophotographers

💫A cluster of massive stars in nebula 30 Doradus


Hubble Space Telescope recount a vivid story of the turbulent birthing process of massive stars. The pictures show that powerful radiation and high-speed material unleashed by "hefty" adult stars residing in the hub of the 30 Doradus Nebula are triggering a new burst of star birth in the surrounding suburbs. Like their adult relatives, the fledgling stars are creating all sorts of havoc in their environment. Nascent stars embedded in columns of gas and dust, for example, are blowing away the tops of their nurseries, like a volcano blasting material into the sky. Jets of material streaming from another developing star are slamming into surrounding dust and gas in opposite directions, causing it to glow in moving patterns. The stellar action is happening relatively nearby, 170,000 light-years from Earth in the Large Magellanic Cloud, a satellite galaxy of the Milky Way. This backyard nursery is a great laboratory for studying the details of the birth and development of "hefty" stars and multiple-star systems.



"This region is larger and contains more massive stars than any similar object in our galaxy," says astronomer Nolan R. Walborn of the Space Telescope Science Institute in Baltimore, Md. "In fact, it is the largest such nebula in the entire Local Group of galaxies. We're able to clearly see objects in the Large Magellanic Cloud because their light is not blocked by interstellar dust, which impedes our study of objects in the Milky Way. Furthermore, it is near enough that individual stars and gaseous structures within it can be studied in detail with large telescopes. "Thus, 30 Doradus provides a model for interpreting even larger starbursts in distant galaxies, for which detailed resolution is not possible. The Hubble images of 30 Doradus reveal characteristics of massive star birth never before seen so clearly, and some of them not at all."

The creator of these powerful cosmic forces is R136, a two-million-year-old central cluster of massive stars. These "heavy" stars have temperatures 10 times that of the Sun and masses up to 100 times greater. Such stars emit prodigious amounts of energy through ultraviolet radiation and high-speed gas. They shed bubbles of material at speeds of thousands of miles per second, which collide with surrounding dense clouds composed predominantly of cold, molecular hydrogen. Some of the clouds collapse, igniting a spate of second-generation stars. Most of these new stars are less than a million years old. Astronomers have not determined how many fledgling stars reside in 30 Doradus, but they estimate the number to be in the thousands, which is a significant fraction of the original generation of stars. All of these stars are packed into a 600-light-year-wide nebula.

Ultraviolet light emitted by the hot stars that make up R136 energizes the clouds of gas, illuminating the surrounding region and showing off the tempestuous activity. The images of this region, taken with the Wide Field and Planetary Camera 2 (WFPC2) and the Near Infrared Camera and Multi-Object Spectrometer (NICMOS), show immense clouds of dust, several in the form of pillars 5 to 10 light-years tall, giant incubators where young stars and multiple star systems are forming. Resembling the towers of the Eagle Nebula, these columns of dust are oriented toward the luminous central star cluster, suggesting that the cluster's powerful emissions are creating these stellar nurseries.

Radiation emitted by some of the fledgling stars has begun to erode their natal dust columns; their emergence from these columns can be seen in the visible-light images. But others are still completely immersed in their stellar incubators. These newborn stars can be discerned only in the infrared images, and many of them have never before been seen. Astronomers have inferred that many of these new stars, based on their total brightnesses, also have very large masses. Other new stars are shooting twin jets of material into the surrounding clouds of dust and gas, causing them to glow. These jets suggest that the stars have rotating disks of material surrounding them. The disks shape and aim the jets.

"The observation of bipolar outflows from massive star formation suggests that accretion disks are essential in forming 'heavy' stars, just as they have been established to be a crucial factor in creating low-mass stars in our solar neighborhood," Dr. Walborn explains. This wave of star birth will continue to migrate farther out in the nebula. In a few million years, 30 Doradus will be a giant shell of hot, glowing hydrogen, with its most massive stars around the periphery. The once-thriving hub of 30 Doradus will be much dimmer: the short-lived massive stars in the central cluster (R136) will have disappeared, and only its lower-mass members will still be present.


Credit: NASA, John Trauger (Jet Propulsion Laboratory) and James Westphal (California Intitute of Technology)

Publicar un comentario






Para visualizar correctamente este sitio web utiliza un navegador basado en Chromium, o Fire Fox. Si te gusta la privacidad se recomienda utilizar Tor Browser.
Para la correcta visualización de la página de Husos Horarios utiliza Internet Explorer.

universo cosmos espacio astonomía cosmología exploración espacial astrofotografía astrofotógrafo astrónomo cosmólogo nebulosa galaxia nube oscura brillante estrella estrellas cúmulo estelar abierto globular planeta sol mercurio venus tierra marte júpiter saturno urano neptuno plutón ceres fobos deimos luna titán encelado europa calisto ganímedes ío caronte hydra nix cometa asteroide cinturón grupo galáctico supercúmulo planetaria emisión reflexión absorción polvo gas atmósfera rayos X gamma cuásar púlsar herbig-haro constelación asterismo fugaces meteoros meteoritossatélite iss estación cohetetelescopio hubble chandra spitzer nustar xmm-newton most very vlt vla vst vista herschel soar ssro sloan rosetta rosat philae osiris subaru campanas kitt keck wilson observatorio palomar calar horizons voyager mpg mycron merlin maven express mariner magellan juno grand canarias gemini hawk galileo galex gaia fuse digited dawn clementine cassini apolo apex alma agujero agujeros polo norte sur sistema solar vacío local big bang oculta coronalunar solar cráter superluna sangre eclipse total parcial ocultación luminiscencia refracción destello anular tránsito protuberancia filamento mancha manchas solares andrómeda messier enana física físico ngc ic trío arp melotte doradus barnard pilares trompa burbuja nuro cabeza cisne cygnus sh2 shapley mz rho sagittarius tarántula magallanes gran pequeña triángulo pickering torre variable binaria espectroscópica bennu thule carinae cygnicom coma virgo cuarteto quinteto cadena energía color markarian tritón molecular supernova nova remanente explosión frente choque einstein caldwell darwin huygens ptolomeo halley piggot gillett hale riccioli gentil newton bode kepler dreyer harding copérnico lacaille loys pierre hawking ciencia científicos cielo arcoiris lenticular espiral elíptica barrada brazo brazos región regiones vdb rcw año luz parsec grado grados celsius farenheit kelvin minuto minutos arco arcominutos oculta llena oscura partículas átomo átomos temperatura millones miles luz espectro universe cosmos space astonomy cosmology space exploration astrophotography astrophotographer astronomer cosmologist nebula galaxy cloud dark shining star stars star cluster open globular planet sun mercury venus earth mars jupiter saturn uranus neptune pluto ceres fobos deimos moon titan waxed europe calist ganymede charontera hydra nix comet aste group hydra nix comet aste group hydra nix comet band galactic planetary supercluster emission reflection absorption dust gas atmosphere x-ray gamma quasar pulsar herbig-haro constellation asterism fleeting meteor meteorite satellite iss station rockettelescope hubble chandra spitzer nustar xmm-newton most very vlt vla vst view herschel soar ssro sloan rosetta rostar ketar keckar ketar ketar ketar subtle rosat ketar roster ketsar keta subar kitty wilson observatory pigeon jello horizons voyager mpg mycron merlin maven express mariner magellan juno grand canarias gemini hawk galileo galex gaia fuse digited dawn clementine cassini apollo apex soul hole aguj eros north pole south solar system empty local big bang hidden coronalunar solar crater supermoon blood eclipse total partial concealment luminescence refraction ring flash transit protuberance filament spot sunspots andromeda messier dwarf physical physics ngc ic trio arp melotte doradus barnard pillars trunk nuro head swan cygnus sh2 shapley mz rho sagittarius tarantula magallanes large small triangle pickering variable tower binary spectroscopic bennu thule carinae cygnicom coma virgo quartet quintet chain energy color markarian molecular triton supernova nova remnant explosion front shock shock einstein caldwell darwin huygens ptolomeo halley piggot gyerton keplentil dd gillett harder keterton gilton kepleton dilton graveyard copernicus lacaille loys pierre hawking science scientists sky rainbow lenticular spiral elliptic barred arm arms region regions vdb rcw year light parsec degree degrees celsius farenheit kelvin minute minutes arc minute arch hidden full dark particles atom atoms temperature millions thousand light spectrum