Until recently scientists thought that these infrared bright merging galaxies were not massive enough to be the precursors of most elliptical galaxies
in the Universe.
NASA says that both S0 and elliptical galaxies
are classified as "early-type" galaxies due to their passive evolution.
Because star-forming activity in many giant elliptical galaxies
has shut down to very low levels, these galaxies mostly house long-lived stars with low masses and red optical colors.
Enabled by Hubble's infrared imaging capabilities, astronomers have assembled for the first time a representative spectroscopic sampling of ultra-compact, burned-out elliptical galaxies
-- galaxies whose star formation was finished when the universe was only 3 billion years old, less than a quarter of its current estimated age of 13.
This is in the main applicable to systems such as planets, stars, globular clusters and elliptical galaxies
We can see young galaxies at great distances, but there is a dearth of elliptical galaxies
at these distances, suggesting they are a later stage in galactic evolution.
Observations from NASA's infrared Spitzer Space Telescope and the visible-light WIYN telescope atop Kitt Peak in Arizona show that the plume contains old, red stars--exactly the type expected to make up the main stellar population in old elliptical galaxies
26 ( ANI ): A new research has found that massive elliptical galaxies
in the nearby Universe contain plenty of cold gas, but still they fail to produce new stars as jets from the central supermassive black hole heat or stir up the gas.
Dwarf spheroidal galaxies are similar in many respects to elliptical galaxies
After learning about the new supernovas, Immler encouraged researchers to reexamine other elliptical galaxies
that have undergone recent mergers.
Rather, they resembled elliptical galaxies
where stars move more hither and thither and where the gas for new star formation has been used up.
30 ( ANI ): Astronomers using NASA's Hubble Space Telescope and Europe's Herschel Space Observatory have pieced together the evolutionary sequence of compact elliptical galaxies
, which erupted and burned out when the universe was only 3 billion years old.