Get your science in Shape
Render Module
Properties Panel: Spectrum
Properties Panel: Spectrum​
Shape calculates the physical radiation properties over a user-supplied range of wavelengths. By default this range is given in terms of velocity (km/s) from a reference wavelength (5e-7 m). This allows a straightforward calculation of position-velocity (P-V) diagrams from a default setup. These defaults can be changed to a range in terms of wavelength in meters (m) that typically ranges from 3.5e-7 to 7e-7 m for the optical spectrum.
For the modeling of radio observations the spectral unit can be set to Hertz (hz).
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Min & Max: The start and end of the spectral interval.
Lambda_0 (l_0): The reference wavelength (rest wavelength) for the calculation of red- and blue-shifts in terms of velocity.
# Bands: The number of spectral bands to be computed. The spectral range is divided in this number of sections of uniform width.
If the shape of the spectrum is important or spectral line structure is meant to be computed, this number is set between 20 and 100 or so. When the overall color of an image rendering is all that is needed, then between 5 and 10 bands is usually sufficient.