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A 3 i s H t This false-color infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together. The big galaxies are at the center of the picture, while the dwarfs can be seen as red dots in the red streamers, or tidal tails. The two blue dots above the big galaxies are stars in the foreground.
Galaxy mergers are common occurrences in the universe; for example, our own Milky Way galaxy will eventually smash into the nearby Andromeda galaxy. When two galaxies meet, they tend to rip each other apart, leaving a trail, called a tidal tail, of gas and dust in their wake. It is out of this galactic debris that new dwarf galaxies are born.
The new Spitzer picture demonstrates that these particular dwarfs are actively forming stars. The red color indicates the presence of dust produced in star-forming regions, including organic molecules called polycyclic aromatic hydrocarbons, or PAHs. PAHs are also found on Earth, in car exhaust and on burnt toast, among other places. Here, the PAHs are being heated up by the young stars, and, as a result, shine in infrared light.
This image was taken by the infrared array camera on Spitzer. It is a 4-color composite of infrared light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange), and 8.0 microns (red). Starlight has been subtracted from the orange and red channels in order to enhance the dust, or PAH, features. Ĺ C ~
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' Adobe Photoshop CS3 Macintosh 2008:11:11 14:31:18 Spitzer Space Telescope
Pasadena
USA
1200 E. California Blvd.
91125
CA
http://www.spitzer.caltech.edu
Distance taken from Quickfacts. Redshift from NED 2008/11/11
200000000
0.014602
Spitzer
Spitzer
Spitzer
sig05-021
Good
IRAC
IRAC
IRAC
2012-10-11
1.1
Spitzer Science Center
spitzer
http://www.spitzer.caltech.edu/images/2391-sig05-021-Dwarf-Galaxies-Forming-in-Tidal-Tails
sig05-021.tif
http://www.spitzer.caltech.edu/uploaded_files/images/0001/6446/sig05-021.tif
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3600
4500
8000
Blue
Green
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The contribution from starlight has been subtracted from the 8.0 micron channel to enhance the visibility of dust features.
C.5.1.7.
C.5.2.2.
C.5.3.3.
Observation
Spitzer Space Telescope
This infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together. The big galaxies are at the center of the picture, while the dwarfs can be seen as red dots in the red streamers, or tidal tails. The two blue dots above the big galaxies are stars in the foreground.
Galaxy mergers are common occurrences in the universe; for example, our own Milky Way galaxy will eventually smash into the nearby Andromeda galaxy. When two galaxies meet, they tend to rip each other apart, leaving a trail, called a tidal tail, of gas and dust in their wake. It is out of this galactic debris that new dwarf galaxies are born.
The new Spitzer picture demonstrates that these particular dwarfs are actively forming stars. The red color indicates the presence of dust produced in star-forming regions, including organic molecules called polycyclic aromatic hydrocarbons, or PAHs. PAHs are also found on Earth, in car exhaust and on burnt toast, among other places. Here, the PAHs are being heated up by the young stars, and, as a result, shine in infrared light.
This image was taken by the infrared array camera on Spitzer. It is a 4-color composite of infrared light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange), and 8.0 microns (red). Starlight has been subtracted from the orange and red channels in order to enhance the dust, or PAH, features.
NGC 5291
Dwarf Galaxies Forming in Tidal Tails
NASA/JPL-Caltech/S. J. U. Higdon (Cornell University)
2005-11-22
This infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together.
Spitzer Space Telescope
http://www.spitzer.caltech.edu/info/18-Image-Use-Policy
%Dwarf Galaxies Forming in Tidal Tails NGC 52917 20051122P Spitzer Space Telescopei This false-color infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together.n NASA/JPL-Caltech/S. J. U. Higdons Spitzer Space TelescopexThis false-color infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together. The big galaxies are at the center of the picture, while the dwarfs can be seen as red dots in the red streamers, or tidal tails. The two blue dots above the big galaxies are stars in the foreground.
Galaxy mergers are common occurrences in the universe; for example, our own Milky Way galaxy will eventually smash into the nearby Andromeda galaxy. When two galaxies meet, they tend to rip each other apart, leaving a trail, called a tidal tail, of gas and dust in their wake. It is out of this galactic debris that new dwarf galaxies are born.
The new Spitzer picture demonstrates that these particular dwarfs are actively forming stars. The red color indicates the presence of dust produced in star-forming regions, including organic molecules called polycyclic aromatic hydrocarbons, or PAHs. PAHs are also found on Earth, in car exhaust and on burnt toast, among other places. Here, the PAHs are being heated up by the young stars, and, as a result, shine in infrared light.
This image was taken by the infrared array camera on Spitzer. It is a 4-color composite of infrared light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange), and 8.0 microns (red). Starlight has been subtracted from the orange and red channels in order to enhance the dust, or PAH, features. 8BIM 6 xThis false-color infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together. The big galaxies are at the center of the picture, while the dwarfs can be seen as red dots in the red streamers, or tidal tails. The two blue dots above the big galaxies are stars in the foreground.
Galaxy mergers are common occurrences in the universe; for example, our own Milky Way galaxy will eventually smash into the nearby Andromeda galaxy. When two galaxies meet, they tend to rip each other apart, leaving a trail, called a tidal tail, of gas and dust in their wake. It is out of this galactic debris that new dwarf galaxies are born.
The new Spitzer picture demonstrates that these particular dwarfs are actively forming stars. The red color indicates the presence of dust produced in star-forming regions, including organic molecules called polycyclic aromatic hydrocarbons, or PAHs. PAHs are also found on Earth, in car exhaust and on burnt toast, among other places. Here, the PAHs are being heated up by the young stars, and, as a result, shine in infrared light.
This image was taken by the infrared array camera on Spitzer. It is a 4-color composite of infrared light, showing emissions from wavelengths of 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange), and 8.0 microns (red). Starlight has been subtracted from the orange and red channels in order to enhance the dust, or PAH, features.i This false-color infrared image from NASA's Spitzer Space Telescope shows little "dwarf galaxies" forming in the "tails" of two larger galaxies that are colliding together.P Spitzer Space Telescopen NASA/JPL-Caltech/S. J. U. Higdons Spitzer Space Telescope %Dwarf Galaxies Forming in Tidal Tails7 20051122 NGC 52918BIM% t!1[xI58BIM
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