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Diversity and Variability of Star Formation


Center for Astrophysics
A Hubble image of the colliding galaxies NGC3690. Over its lifetime, a galaxy’s star formation history is affected by many physical processes including mergers. A new study uses many simulations of galaxy evolution to develop a statistical method to categorize the star-formation history from snapshot observations.
NASA/ESA/Hubble
Galaxies in the observable universe show a remarkable diversity in their structure and properties, mostly because of the many different pathways for their stars to form and evolve. The growth of galaxies typically occurs through the accretion of gas or by mergers of galaxies. Their star formation activity is affected by turbulence and feedback in the gas, and can be quenched by shocks or winds from supernovae or active galactic nuclei. The complex growth history of stars includes physical processes that operate over a wide range of timescales. At the shortest timescales, less than about tens of millions of years, do ....

Lars Hernquist , Rachels Somerville , Romeel Dave , Christopherc Hayward , Tjitskek Starkenburg , Johnc Forbes , Kartheikg Iyer , Eric Gawiser , Sandro Tacchella , Benedikt Diemer , Star Formation Histories , Galaxy Evolution , Shy Genel , Neven Caplar , விண்மீன் பரிணாமம் , கூச்சமுடைய கேனஎல் ,