javagogl.blogg.se - Cuel nuggit

Monthly Notices of the Royal Astronomical Society. "Wet disc contraction to galactic blue nuggets and quenching to red nuggets". "Compaction and quenching of high-z galaxies in cosmological simulations: blue and red nuggets".

^ Zolotov, Adi Dekel, Avishai Mandelker, Nir Tweed, Dylan Inoue, Shigeki DeGraf, Colin Ceverino, Daniel Primack, Joel R.

^ " 'Red nuggets' are galactic gold for astronomers".

"Red nuggets grow inside-out: evidence from gravitational lensing".

Lagattuta, David Marshall, Philip McKean, John (). The Daily Galaxy -Great Discoveries Channel.

^ "Ancient "Red Nuggets" Detected -Relics of the 1st Massive Galaxies in the Universe with Gigantic Supermassive Black Holes".

^ a b " "Red Nugget" galaxies were hiding in plain sight".

“Looking for ‘red nuggets’ in the Sloan Digital Sky Survey was like panning a riverbed, washing away silt and mud to uncover bits of gold,” īefore Damjanov and her team had thought to look through the immense database of the SDSS, no one could find the elusive galaxies after their original discovery in 2005. Damjanov expressed how truly amazing the discovery was when she said, But their spectra shows what they really are.

These red nuggets have been missed so long because, due to their extremely small size, they look like stars in pictures. Sloan Digital Sky Survey Ī team led by Ivana Damjanov found over 600 red nugget candidates in the Sloan Digital Sky Survey (or SDSS) database, of which 9 were confirmed as red nuggets. Another theory says that red nuggets are young elliptical galaxies, therefore forming the same way they do. Results show that red nuggets may have untapped stellar "fuel" to produce their unusually large number of stars. This brings up the intriguing question on how they could possibly be packed so densely with stars. Star formation ĭata from NASA's Chandra X-Ray Observatory observing the red nuggets Mrk 1216 and PGC 032673 has shown that the central black holes suppress star formation in red nuggets with their heat and feed on the gas surrounding them. The quenching happens because of the extremely high SFR, stellar and supernova feedback, and possibly also active galactic nuclei feedback due to the high gas density in the center of the red nugget. It is also frequently associated with extreme disc instability. The compaction happens due to a fierce period of inflow involving (mostly small) mergers and counter-rotating streams or recycled gas. Galaxies with more mass quench earlier than galaxies with low amounts of mass because galaxies with low amounts of mass try to quench several times. The quenching of the blue nugget happens at a completely constant stellar surface density. The compaction of the blue nugget happens at an approximately constant specific star formation rate (or SFR). Blue nuggets are early, stream fed, star-forming systems that are quenched inside-out within the inner kiloparsec (kpc) and dissipatively compacted into red nuggets at their peak of gas compaction. Red nuggets are formed from blue nuggets. Red nuggets are not only nicknamed for their size and color, but also for how precious the discovery is to curious astronomers since it challenged current theories at the time the term was coined on galaxy formation.