The spectrum of a blazar shows:
A)absorption lines of highly ionized atoms.
B)doubled emission lines split by the Doppler shift of oppositely directed jets of material.
C)strong, highly redshifted emission lines.
D)a continuum with very faint emission and absorption lines that are all but rendered invisible by the intense radio radiation.

Question

Quizplus · Accepted Answer

Blazars are a type of active galactic nucleus (AGN) characterized by their intense electromagnetic radiation across the spectrum, including radio frequencies. Their spectrum typically shows a continuum with very faint emission and absorption lines, which are often overwhelmed by the intense radiation, particularly in the radio frequencies. This is due to the relativistic jets pointed almost directly at Earth, which boost the continuum radiation through synchrotron and inverse Compton processes.

The Spectrum of a Blazar Shows