PIA18847-GalaxyNGC1291-IR-SpitzerST-20141022
Ring of Stellar Fire
http://www.jpl.nasa.gov/spaceimages/details.php?id=pia18847
http://www.jpl.nasa.gov/news/news.php?release=2014-367
This image from NASA's Spitzer Space Telescope shows where the action is taking place in galaxy NGC 1291. The outer ring, colored red, is filled with new stars that are igniting and heating up dust that glows with infrared light.
This image from NASA's Spitzer Space Telescope, taken in infrared light, shows where the action is taking place in galaxy NGC 1291.
The outer ring, colored red in this view, is filled with new stars that are igniting and heating up dust that glows with infrared light. The stars in the central area produce shorter-wavelength infrared light than that seen in the ring, and are colored blue. This central area is where older stars live, having long ago gobbled up the available gas supply, or fuel, for making new stars.
The galaxy is about 12 billion years old and is located in the Eridanus constellation. It is known as a barred galaxy because a central bar of stars (which looks like a blue "S" in this view) dominates its center.
When galaxies are young and gas-rich, stellar bars drive gas toward the center, feeding star formation. Over time, as the star-making fuel runs out, the central regions become quiescent and star-formation activity shifts to the outskirts of a galaxy. There, spiral density waves and resonances induced by the central bar help convert gas to stars. The outer ring, seen here in red, is one such resonance location, where gas has been trapped and ignited into a star-forming frenzy.
NASA's Jet Propulsion Laboratory, Pasadena, Calif., manages the Spitzer Space Telescope mission for NASA's Science Mission Directorate, Washington. Science operations are conducted at the Spitzer Science Center at the California Institute of Technology in Pasadena. Spacecraft operations are based at Lockheed Martin Space Systems Company, Littleton, Colorado. Data are archived at the Infrared Science Archive housed at the Infrared Processing and Analysis Center at Caltech. Caltech manages JPL for NASA.
For more information about Spitzer, visit http://spitzer.caltech.edu and http://www.nasa.gov/spitzer.Relevante Bilder
Relevante Artikel
NGC 1291NGC 1269 = NGC 1291 ist eine linsenförmige Ringgalaxie vom Hubble-Typ SB0/a mit einer ungewöhnlichen inneren Balken- und äußeren Ringstruktur im Sternbild Eridanus am Südsternhimmel. Sie ist schätzungsweise 32 Millionen Lichtjahre von der Milchstraße entfernt, hat einen Durchmesser von etwa 125.000 Lichtjahren und ist die hellste Galaxie im Eridanus. .. weiterlesen