A galaxy showing a short-lived intense period of star formation that is unsustainable over the Hubble time due to the limited supply of gas within a galaxy. Starburst galaxies were first classified by
Searle & Sargent (1972) and Searle et al. (1973), based on the blue colors produced by the massive stars formed during the burst. In the local Universe, starbursts create approximately 10% of the radiant energy and 20% of the massive stars. At z = 1, starburst characteristics are found in 15% of galaxies, presumably attributable to the greater amounts of gas typically present in young galaxies and increased galactic interactions. The starburst's impact on a galaxy and the surrounding intergalactic medium is primarily due to the consumption of gas that fuels the burst and the feedback from massive stars formed in the burst.
A galaxy showing a short-lived intense period of star formation that is unsustainable over the Hubble time due to the limited supply of gas within a galaxy. Starburst galaxies were first classified by
Searle & Sargent (1972) and Searle et al. (1973), based on the blue colors produced by the massive stars formed during the burst. In the local Universe, starbursts create approximately 10% of the radiant energy and 20% of the massive stars. At z = 1, starburst characteristics are found in 15% of galaxies, presumably attributable to the greater amounts of gas typically present in young galaxies and increased galactic interactions. The starburst's impact on a galaxy and the surrounding intergalactic medium is primarily due to the consumption of gas that fuels the burst and the feedback from massive stars formed in the burst.
A group of stars held together by the mutual gravitational attraction of its members, which are physically related through common origin. They are of two types: open clusters and globular clusters.
The process by which dense parts of molecular clouds collapse into a ball of plasma to form a star. As a branch of astronomy, star formation includes the study of the interstellar medium and molecular
clouds as precursors to the star formation process as well as the study of young stellar objects.