Evidence of a Supermassive Black Hole in a Galaxy

What should Alois look for in order to find evidence that a galaxy has a supermassive black hole?

A. neutron star

B. quasar

C. pulsar

D. black matter

Final answer:

Alois, as an astronomer, can look for quasars, pulsars, and gravitational effects to find evidence of a supermassive black hole in a galaxy.

As an astronomer, Alois has several options to look for evidence of a supermassive black hole in a galaxy. One of the most common indicators is the presence of a quasar, which is an extremely bright and energetic object powered by a supermassive black hole at its center.

Another potential sign to look for is the detection of pulsars, which are rapidly rotating neutron stars. These can provide clues about the presence of a supermassive black hole.

Lastly, Alois can observe for gravitational effects on surrounding matter, such as the motion of stars, which can also offer evidence of a supermassive black hole's existence in a galaxy.