(2016, February 11). ScienceDaily. During its active period, astronomers would have classified NGC 4889 as a quasarand the disc around the supermassive black hole would have emitted up to a thousand times the energy output of the Milky Way.The accretion disc sustained the supermassive black hole's appetite until the nearby supply of galactic material was exhausted. But astronomers can find and measure them based on how they affect surrounding objects like stars and gas clouds. A near-record 17-billion-solar-mass black hole discovered in a sparse area of the local universe indicates that these monster objects may be more common than once thought. That process has now paused, but it could restart at a later date.We can't see black holes directly because light can't escape their tremendous gravitational pull. Astronomers believe that the gigantic black hole has stopped feeding, and is currently resting after feasting on NGC 4889's cosmic cuisine. ScienceDaily, 11 February 2016. The brightest orb toward the center of this image from the Hubble Space Telescope is the galaxy NGC 4889, which contains a cosmic surprise.At the heart of a brilliant elliptical galaxy sits one of the most massive black holes ever discovered.The image shows a bright white orb against a starry black background.
By studying such images, scientists hope to unravel the deep secrets of the universe. All rights reserved ScienceDaily. When it was active, NGC 4889’s supermassive black hole was fuelled by the process of hot accretion.
NGC 4845 (also known as NGC 4910) is a spiral galaxy located in the constellation Virgo around 47 million light years away. "The sleeping giant NGC 4889 harbors a dark secret." Using instruments on the Keck II Observatory and Gemini North Telescope, astronomers measured the velocity of the stars moving around NGC 4889's centre. "The sleeping giant NGC 4889 harbors a dark secret." Have any problems using the site? Questions?ESA/Hubble Information Centre. The black hole at the center of NGC 4889 is among the largest ever discovered, but it is currently slumbering. It was discovered in 1785 by the British astronomer Frederick William Herschel I, who catalogued it as a bright, nebulous patch. But the elliptical galaxy, pictured in this new image from the NASA/ESA Hubble Space Telescope, harbours a dark secret. The environment within the galaxy is now so peaceful that stars are forming from its remaining gas and orbiting undisturbed around the black hole.When it was active, NGC 4889's supermassive black hole was fuelled by the process of hot accretion. www.sciencedaily.com/releases/2016/02/160211141333.htm (accessed August 1, 2020).Below are relevant articles that may interest you. The other, named NGC 4889, the brightest galaxy in the Coma cluster more than 335 million light years away, has a black hole of comparable or larger mass. It is not intended to provide medical or other professional advice.Views expressed here do not necessarily reflect those of ScienceDaily, its staff, its contributors, or its partners.Financial support for ScienceDaily comes from advertisements and referral programs, where indicated. This heated material also expelled gigantic and very energetic jets. The galaxy has a supermassive black hole at its center with a mass of 300,000 ⊙.In 2013, the ESA observed the black hole absorbing matter from a nearby, low-mass object; possibly a brown dwarf star.