Posted by Fred on January 27, 2012
Using the APEX telescope, a team of astronomers has found the strongest link so far between the most powerful bursts of star formation in the early Universe, and the most massive galaxies found today. The galaxies, flowering with dramatic starbursts in the early Universe, saw the birth of new stars abruptly cut short, leaving them as massive — but passive — galaxies of aging stars in the present day. The astronomers also have a likely culprit for the sudden end to the starbursts: the emergence of supermassive black holes.
Interesting report at ESO on why we don’t see much star formation in massive galaxies–except in the relatively early Universe.
Posted by Fred on January 26, 2012
The most fundamental matter particles known are the quarks and leptons. The physical theory describing the interaction of quarks via the color force is quantum chromodynamics. Over at Quantum Diaries, a quite good blog, Dr. Tanedo has put up a nice intro to quarks (which picked up their whimsical name from James Joyce’s Finnigans Wake) and quantum chromodynamics. Read the whole thing.
Posted by Fred on January 17, 2012