Question

question 15
1 pts
what do we observe at radio, infrared, and x - ray wavelengths near the center of the milky way galaxy that leads us to conclude that a supermassive black hole is located there?
○ a strong source of radio waves called sagittarius a+
○ famous moving stars in elliptical orbits
○ all of these
○ supernova remnants

Explanation:

• Sagittarius A* is a strong radio - wave source at the Milky Way's center.
• Observations of stars in elliptical orbits near the center (using infrared to track stars over time) help determine the mass (and thus the presence of a supermassive black hole as the massive object causing the orbits).
• X - ray observations can show phenomena related to the accretion of matter onto the black hole (e.g., X - ray flares from hot gas near the event horizon).
• Supernova remnants are not directly evidence for a supermassive black hole at the Milky Way's center.

Answer:

C. all of these