Delta Scuti stars are interesting because unlike their larger Cepheid cousins, they often pulsate in what are called nonradial modes. If you've ever had a course on spherical harmonics, I just mean that the azimuthal quantum number is greater than 0.
see Delta Scuti Stars.
Ultraviolet
(a) Part of the electromagnetic spectrum immediately above visible light (but below Gamma-rays and X-rays); ...
A close look, however, reveals a neat symmetry between the two, as both are class F subtly-pulsating variable stars: Polaris class F7, Sigma Oct hotter, F0; Polaris an oddball Cepheid pulsator, "Australis" a Delta Scuti star.
A type of pulsating variable that is very similar to a Delta Scuti star but has a greater amplitude (up to about 1.2 magnitude) and a period of 1 to 5 hours. The prototype, located in the constellation Vela, 2.
Caph is a variable star of Delta Scuti type as well. The brightness fluctuates by about 0.03 magnitudes with a period of 2.4 hours. See Burnham for a detail discussion of the Delta Scuti stars.
Other Designations For This Star
Flamsteed ...
shorter than the Planck length (and also time scales shorter than the Planck time). [G99]
Ultra-Relativistic
Having velocities very nearly equal to the velocity of light (E mc2). [H76]
Ultrashort-Period Cepheids
see Delta Scuti Stars.
 See also: Delta, Delta Scuti, Sun, Period, Dwarf
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