单词	accretion disk
释义	accretion disk noun variants or less commonly accretion disc plural accretion disks also accretion discs : a disk of usually gaseous matter surrounding a massive celestial object (such as a black hole) in which the matter gradually spirals in toward and accretes onto the object as a result of gravitational attraction Evans' team studied a supermassive black hole with jets 800 million light-years away named 3C 33. They never found an expected X-ray pattern … which results from light reflecting off the accretion disk. Bill Andrews Most other moons are either captured planetesimals, or they formed along with the planet in a common accretion disc. Daniel Herwartz, et al. Example Sentences Recent Examples on the Web Strong magnetic fields cause matter to fly out from the accretion disk too, either as diffuse galactic winds or in powerful narrow jets. Thomas Lewton, Quanta Magazine, 23 Aug. 2022 The team researched the gas in the accretion disk, a rotating ring of matter that emits x-rays and visible light to help show where the black hole is, to see the gas’s movement. Tim Newcomb, Popular Mechanics, 14 July 2022 This can form a rotating ring of matter (aka, an accretion disk) around the black hole that emits powerful X-rays and visible light. Jennifer Ouellette, Ars Technica, 13 July 2022 However, the dense plasma that surrounds them, known as an accretion disk, does. Joshua Hawkins, BGR, 10 May 2022 Enlarge / Illustration of a black hole pulling material off a neighboring star and into an accretion disk. Jennifer Ouellette, Ars Technica, 2 May 2022 Black holes are invisible, of course, but their gravity can lure rapidly moving and visible material, known as an accretion disk. Joel Achenbach, Anchorage Daily News, 30 Mar. 2022 In contrast, the accretion disk around a feeding black hole is viscous and hot, and its temperature increases from its exterior toward the event horizon of the black hole. Aaron S. Evans, Scientific American, 1 Dec. 2021 As black holes use their gravitational pull to tug material inward, interstellar gas and dust swirls into something called an accretion disk around the black hole. Ashley Strickland, CNN, 13 Dec. 2021 See More Word History First Known Use 1972, in the meaning defined above
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