Star formation appears to occur by gravitational instabilities in galac-tic disks. The high dispersion makes the clumps massive and the disks thick. The star formation rate should be comparable to the gas accre-tion rate of the whole galaxy, because star formation is usually rapid and the gas...
What surprised astronomers most was the intense rate the galaxy was churning out stars, around 150 times faster than the Milky Way. “We didn’t think you could make galaxies with such intense star formation rates in the early universe. Star formation tends to be proportional to the mass of...
The galaxy has a 24 kpc wide ring of molecular gas, and a source-averaged star formation rate that is factors 30 to 70 lower than expected from the Kennicutt-Schmidt law. With MUSE, we have analyzed the stellar continuum and bright optical line emission and have constrained the spatially ...
Stars form in galaxies with markedly different properties, with masses varying by factors of ∼108 and mean densities varying over a corresponding range. In our universe, the star formation rate became substantial at redshift z∼10 and peaked at z∼2 when the universe was about 3.5 Gyr ...
There has been plenty of observational evidence of cluster galaxy evolution such as the ButcherOemler effect and the decrease in S0 fraction with increasing redshift. As a modern version, the redshift evolution of total star formation rate (SFR) in clusters has been actively debated recently. ...
Kennicutt & Kent (1983) have shown that the global Ha emission from a spiral galaxy is an indicator of the formation rate of massive stars. Moss, Whittle &: Irwin (1988) have surveyed two clusters (Abell 347 and 1367) for galaxies with Ha emission using a high dispersion objective prism...
The Large Synoptic Survey Telescope (LSST) will provide a new window into galaxy formation and evolution by imaging the entire southern sky with unprecedented sensitivity. By probing the rarest cosmic environments, LSST can reveal the extreme conditions under which the most luminous galaxies and the ...
We present the results of a CO line survey of 30 galaxies at moderate redshift (<italic>z</italic> ~ 0.2−0.6), with the IRAM 30 m telescope, with the goal to follow galaxy evolution and in particular the star formation efficiency (SFE) as defined by t
(2014), whereby the specific merger rate is hypothesized to be proportional to the specific star-formation rate, and HI gas mass measurements for local galaxies with high sSFR, we estimate that moderate mass galaxies, log M_star (M_sun)=9-10.5, can acquire sufficient gas through minor ...
Modern clusters, for instance, brim with superheated gas that can reach temperatures of more than 1 million degrees. Scientists aren't sure how that gas got there, though. The high rate of star formation in the newly discovered protocluster may provide a clue: A deluge of newborn stars in...