What is the evidence that there is a supermassive black hole at the center of our Galaxy? how is it possible to determine the mass of this black hole?

The rapid movement of stars surrounding Sagittarius A* suggests that it is a supermassive black hole whose mass is about 3 million times solar. More test answers on https://studyhippo.com/stars-and-galaxies-43884/

Which of the following observations confirms that the object named “Sgr A*” at the center of our galaxy is indeed a supermassive black hole?

Measurements of the orbits of stars around Sgr A* More test answers on https://studyhippo.com/exam-3-practice-quiz-39389/

Which of the following phenomena is probably not related to the presence of a supermassive black hole?

the presence of globular clusters in the halos of galaxies. More test answers on https://studyhippo.com/astronomy-chapter-21/

According to the model in which active galactic nuclei are powered by supermassive black holes, the high luminosity of an active galactic nucleus primarily consists of ______.

light emitted by hot gas in an accretion disk that swirls around the black hole More test answers on https://studyhippo.com/astronomy-chapter-21/

According to the model in which that active galactic nuclei are powered by supermassive black holes, the energy released as light comes from _____.

gravitational potential energy released by matter that is falling toward the black hole More test answers on https://studyhippo.com/astronomy-chapter-21/

What do Supermassive black holes do

are “fed” by disturbed gas when galaxies interact More test answers on https://studyhippo.com/astronomy-chapter-14/

the supermassive black hole in center of the Milky Way galaxy is 4 million Msun. However, in the previous question you determined the mass was quite different. Why do you think this is?[

In elliptical orbits when an object is close to the focal point it moves faster than when it is in the part of the orbit that is farther away. For example, a planet orbiting the Sun will speed up along its orbital path when it is closest to the Sun and it will slow down when it is farthest away from the Sun. For this reason, our estimates of the period of the stars around the center of the Milky Way are not precise. Also, We did not take into account the inclination of the orbit, so our measurement of the semimajor axis is not accurate More test answers on https://studyhippo.com/astro-practice-2/

Which characteristic is not generally true of a starburst galaxy? 1. Supernovae occur so frequently that their effects combine to drive a galactic wind that blows material into intergalactic space. 2. Its rate of star formation is many times higher than the rate of star formation in the Milky Way. 3. The observed features of the starburst are thought to be caused by the presence of a supermassive black hole in the galaxy’s center. 4. The observed features that cause us to classify it as a “starburst” must be only temporary phenomena in the galaxy’s history.

3. The observed features of the starburst are thought to be caused by the presence of a supermassive black hole in the galaxy’s center. More test answers on https://studyhippo.com/astronomy-chapter-21-concept-quiz/

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Supermassive Black Hole Flashcards, test questions and answers

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What is Supermassive Black Hole?

A supermassive black hole is a type of astronomical object that has a mass equal to or greater than one million solar masses. These objects are thought to exist in the centers of most galaxies, including our own Milky Way. They are believed to be formed from the collapse of large clouds of gas and dust in early galactic formation and have been detected by their strong gravitational pull on nearby stars, as well as their powerful emissions of X-ray radiation. Supermassive black holes play an important role in regulating the growth and evolution of galaxies. By consuming material around them, they act as powerful cosmic vacuums , clearing out debris and allowing new stars to form. They can also spew out jets of matter at near light speed which can heat up surrounding gas clouds and trigger star formation activity within them. Additionally, these objects may be responsible for some extreme phenomena such as quasars powerful sources of electromagnetic radiation powered by rotating disks or accretion discs around supermassive black holes and gamma ray bursts brief yet intense flashes of high energy radiation resulting from collisions between two stellar cores in distant galaxies. The study of supermassive black holes has become increasingly important over recent years due to advances in observational techniques such as radio interferometry and infrared surveys that allow us to detect even faint signals coming from these enigmatic cosmic entities. As we continue to explore our universe with more sophisticated equipment, it is likely that we will uncover even more remarkable secrets about these massive structures at its heart.