Are changing-look quasars an anomaly and in physically different state or are just edge cases of quasars during low activity?
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Are changing-look quasars an anomaly and in physically different state or are just edge cases of quasars during low activity?
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- Is the appearance of a quasar changing over time a sign that it has entered a new physical state, or are these objects just the extreme outliers of quasars at low activity?how long do long-exposure photos of two selected areas of the sky reveal that galaxies are very common?Suppose a quasar has a luminosity of 1012 LO. What is the smallest mass that the quasar could have and still continue to pull surrounding gas into itself?