Task: Text Categorization
Input (English): One form of resonance posited to describe these objects occurs where the difference between the pattern and co-rotation frequencies is an integer quotient of the epicyclic frequency. Those resonances exist in the theory of these objects as density waves in a gravitational plasma dispersion relation; those waves are only quasi-stable as these objects cannot be stable due to the so-called winding problem. The aforementioned resonances are named for Lindbladt and the aforementioned theory for (*) Lin and Shu. The rotation rate of these objects increases with luminosity according to the Tully-Fisher relation. Like their elliptical counterparts, they generally contain a red nucleus. Some of these galaxies contain bars. FTP, identify this common type of galaxies, exemplified by the milky way, characterized by their swirling appearance.
Output (English): Science