Yale astronomers Grant Tremblay and Meredith Powell are partial of a initial investigate group to request a “changing look” quasar by a full cycle from low to splendid to low again.
Quasars are a intensely splendid cores found in some galaxies, powered by supermassive black holes. Their liughtness is believed to come from a prohibited element that falls into a black hole, a routine called accretion.
“Thirty years ago this supermassive black hole really dramatically brightened, apropos a Type 1 quasar,” Tremblay said. “We detected this year that it has now dimmed again, creation it a initial such intent to go ‘there and behind again.’”
Two investigate studies of a intent — universe Markarian 1018 — will seem in a biography Astronomy Astrophysics. A apportionment of a information used in a studies comes from a Close AGN Reference Survey (CARS), a sampling of 40 circuitously Active Galactic Nuclei. Yale is a first member establishment of a survey.
For some-more information about CARS, revisit a website.
Source: Yale University