The Lilly-Madau diagram from Madau & Dickinson (2014), showing the star formatio

Question

The Lilly-Madau diagram from Madau & Dickinson (2014), showing the star formation per unit volume as a function of redshift, (and thus cosmological time). Measurements from a variety of wavelengths (including UV, infrared and radio) are combined in the left panel, while UV and infrared are shown separately in the right panel. (a) Describe why the ultraviolet, far-infrared and radio continuum all trace star formation within galaxies. (b) How are measurements of the UV and far-infrared impacted by the dust content (or lack thereof) within a galaxy?

Explanation / Answer

a) The mentioned radiations have wavelength that are in the extreme ties. . Either in lowest or highest region

b) Dust content explicitly encourages the chance for scattering of the radiation in discussion which may include turn cause the considerable changes in behaviour from expected one.

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