This ontology covers classes and properties in the field of physics that are commonly used by astronomers. It includes terms from the IVOA Thesaurus plus terms from the UMD astronomical ontology
The most common temperature scale for scientific work. The freezing point of water is 0 degrees and the boiling point of water is 100 degrees in this system.
conductance quantum is the quantized unit of conductance. It is defined by \frac{2e^2}{h}
The lowest characteristic frequency of oscillation of a dynamical system.
The Hanle Effect describes resonant line scattering polarization in a magnetic medium.
the Paschen-Back effect is the splitting of atomic energy levels in the presence of a strong magnetic field. This occurs when an external magnetic field is sufficiently large to disrupt the coupling between orbital and spin angular momenta. This effect is the strong field generalization of the Zeeman effect.
A set of lines in the spectra of molecules corresponding to unit increases in rotational energy.
The presence of a thermal plasma in the emitting region means that the refractive index of the medium is less than unity and the phase velocity of electromagnetic waves is greater than $c$. As a result, synchrotron radiation is suppressed at frequencies where the refractive index becomes significantly less than 1. This is often called Tsytovich-Razin effect. The consequence is a low-frequency cutoff near \begin{displaymath} \rm { {\nu_{R}} = {{4 c n e} \over {3 B_{\bot}}} = {{2\nu_{p... ... \nu_{0}}} \sim {{2 \times 10^{-5} n} \over {B_{\bot}}} MHz} \end{displaymath}
With Respect To. Velocity is a motion with respect to some other Thing.
This allows giving a frequency, wavelength or Energy for the reference Amplitude.
Temperature scale used for ordinary purposes in the United State Conversion from Centigrade is Centigrade*9/5 + 32.