منابع مشابه
Global Star Formation Revisited
A general treatment of disk star formation is developed from a dissipative multi-phase model, with the dominant dissipation due to cloud collisions. The Schmidt-Kennicutt law emerges naturally for star-forming disks and starbursts. We predict that there should be an inverse correlation between Tully-Fisher law and Schmidt-Kennicutt law residuals. The model is extended to include a multi-phase t...
متن کاملMagnetic Effects in Global Star Formation
I review the effects of magnetic fields on star formation in galaxies. This includes the effects of the magnetorotational instability (MRI) at galactic scales, magneto-Jeans and swing instabilities, Parker instabilities, and the effects of magnetic fields on the evolution of supernova-driven turbulence. I argue that currently turbulent support by the MRI appears likely to be the most important ...
متن کاملA Global Perspective on Star Formation
We outline a method to infer the global history of star formation in galaxies with input only from absorption-line observations of quasars. The application of the method to existing data leads to the conclusion that most stars formed at relatively low redshifts (z ∼ < 2). We combine the global rate of star formation with stellar population synthesis models to compute the mean comoving emissivit...
متن کاملStar Formation Efficiencies and Star Cluster Formation
Starbursts produce large numbers of Young Star Clusters (YSCs). Multi-color photometry in combination with a dedicated SED analysis tool allows to derive ages, metallicities, EB−V, and masses including 1σ uncertainties for individual clusters and, hence, mass functions for YSC systems. The mass function, known to be Gaussian for old Globular Cluster (GC) systems, is still controversial for YSC ...
متن کاملA Low Global Star Formation Rate in the Rich Galaxy
We present the results of a wide-field survey for H -emitting galaxies in the cluster AC 114 at z = 0:32. Spectra centred on H at the cluster redshift have been obtained for 586 galaxies to Itot 22 out to a radius of 2 h−1 50 Mpc. At most, only 10% of these were found to be H –emitting cluster members. These objects are predominantly blue and of late-type spiral morphology, consistent with them...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2009
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/700/1/262