Astronomers spot quasar with the most powerful winds ever seen
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Scientists took a second look at a strange object and spotted the most powerful winds ever detected gusting off of a special flavor of black hole called a quasar.
A quasar forms when a supermassive black hole accelerates certain particles it cannot absorb so dramatically that they reach nearly the speed of light as they shoot away from the black hole in bright, jetlike structures. Quasars often also produce winds that can gust through the surrounding galaxy, reducing star formation. But, until now, scientists haven’t ever seen such powerful quasar winds.
“While high-velocity winds have previously been observed in quasars, these have been thin and wispy, carrying only a relatively small amount of mass,” Sarah Gallagher, an astronomer at Western University in Canada and lead author on the new research, said in a university statement. “The outflow from this quasar, in comparison, sweeps along a tremendous amount of mass at incredible speeds. This wind is crazy powerful, and we don’t know how the quasar can launch something so substantial.”
The newly studied quasar, which scientists refer to as SDSS J135246.37+423923.5, is produced by a supermassive black hole containing more than 8 billion times the mass of our sun, or perhaps 2,000 times the mass of the black hole at the center of our own galaxy, according to the team’s calculations.
This quasar was first discovered by a project called the Sloan Digital Sky Survey, which produces massive maps of the universe, and was revisited by the Gemini North telescope located atop Maunakea in Hawaii. The team behind the new research also needed to apply a recently developed technique for analyzing this sort of quasar, which scientists call a broad absorption line quasar after a characteristic in the data such objects produce.
“We were shocked — this isn’t a new quasar, but no one knew how amazing it was until the team got the Gemini spectra,” Karen Leighly, a co-author on the new research and an astronomer at the University of Oklahoma, said in the same statement. “These objects were too hard to study before our team developed our methodology and had the data we needed, and now it looks like they might be the most interesting kind of windy quasars to study.”
An artist’s depiction of the same system as seen in infrared light. (Image credit: International Gemini Observatory/NOIRLab/NSF/AURA/P. Marenfeld)
The calculations based on this analysis suggest that this particular object is producing the most powerful quasar winds scientists have ever detected. The phenomenon is particularly intriguing because scientists believe such winds play a key role in sculpting the galaxies that surround the structure.
The researchers hope that this quasar isn’t the only one of its kind. “We don’t know how many more of these extraordinary objects are in our quasar catalogs that we just don’t know about yet,” Hyunseop Choi, first author on the new research and a graduate student at the University of Oklahoma, said in the same statement. “There could be more of these quasars with tremendously powerful outflows hidden away in our surveys.”
The research is described in a paper published March 1 in the Astrophysical Journal.