RADEON's video: BLACK HOLE COMPARISON

Video Title : BLACK HOLE COMPARISON . A Supermassive black hole (SMBH) is the largest type of black hole, on the order of hundreds of thousands to billions of solar masses (M☉), and is theorized to exist in the center of almost all massive galaxies. Unambiguous dynamical evidence for SMBHs exists only in a handful of galaxies;[1] these include the Milky Way, the Local Group galaxies M31 and M32, and a few galaxies beyond the Local Group, e.g. NGC 4395. In these galaxies, the mean square (or root mean square) velocities of the stars or gas rises as ~1/r near the center, indicating a central point mass. In all other galaxies observed to date, the rms velocities are flat, or even falling, toward the center, making it impossible to state with certainty that a supermassive black hole is present.[1] Nevertheless, it is commonly accepted that the center of nearly every galaxy contains a supermassive black hole.[2] The reason for this assumption is the M-sigma relation, a tight (low scatter) relation between the mass of the hole in the ~10 galaxies with secure detections, and the velocity dispersion of the stars in the bulges of those galaxies.[3] This correlation, although based on just a handful of galaxies, suggests to many astronomers a strong connection between the formation of the black hole and the galaxy itself. . Although SMBHs are currently theorized to exist in almost all massive galaxies, more massive black holes are rare; with only fewer than several dozen having been discovered to date. There is extreme difficulty in determining a mass of a particular SMBH, and so they still remain in the field of open research. SMBHs with accurate masses are limited only to galaxies within the Laniakea Supercluster and to active galactic nuclei. . Another problem for this list is the method used in determining the mass. Such methods, such as broad emission-line reverberation mapping (BLRM), Doppler measurements, velocity dispersion, and the M-sigma relation have not yet been well established. Most of the time, the masses derived from the given methods contradict each other's values. . . . Refrences 1)https://en.wikipedia.org/wiki/List_of_most_massive_black_holes 2)https://en.wikipedia.org/wiki/TON_618 3)https://simple-cosmos-official.fandom.com/wiki/SDSS_J140821.67%2B025733.2_Central_Black_Hole 4)https://the-universe-of-the-universe.fandom.com/wiki/SDSS_J140821.67%2B025733.2 . Background Music Credits to : Fesliyan Studios Download Link : https://fesliyanstudios.com/d?id=151 Video Link : https://youtu.be/UcNGusYyG8s . Official Video : https://youtu.be/NF1UQG1LsqE . "Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for "fair use" for purposes such as criticism, comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. . Powered by : RADEON X . THANKS FOR WATCHING ! . DO LIKE, SHARE & SUBSCRIBE FOR MORE...