NASA’s X-ray spacecraft XRISM, which stands for X-ray Imaging and Spectroscopy Mission, has observed how fast winds from a distant galaxy are exploding in the form of stars.
These winds appear to travel at an incredible speed of 2 million miles per hour (3.21 million kilometers per hour).
Team member Erin Boettcher of the University of Maryland, College Park and NASA’s Goddard Space Flight Center in Greenbelt, Maryland, “The classic model of exploding galaxies like M82 suggests that shock waves from the formation of stars and supernovas near the central core gas,” said in a statement. “However, before XRISM, we did not have the ability to measure the velocities needed to test that hypothesis. Now we see the gas moving faster than other models predict, more than enough to drive the wind to the edge of the galaxy.”
Boettcher measured the speed of these interstellar winds using the XRISM (pronounced “crism”) instrument on the spacecraft.
The neck of a cigar contains hot, smoky air
It is also known as the Cigar GalaxyM82 is known for its cool winds made up of massive amounts of gas and dust that span about 40,000 light-years. These winds have been seen with many space telescopes, including The Hubble Telescopethe James Webb Space Telescope (JWST), Chandra and Spitzer.
The goal of the team’s research was to correlate this massive flow of matter with the activity of the M82 star. This involves discovering the effect of high speed particles called cosmic rays on the atmosphere of the galaxy. This is important because the researchers suggest that the same event that blows these winds also produces cosmic rays and they believe that they may be the main source of pressure to push out.
XRISM measured the 2-million-mph speed of these winds by observing the X-ray emission emitted by the superheated metal at the center of M82. This also revealed a temperature of 45 million degrees Celsius (25 million degrees Celsius) in the galactic center of M82, with this pressure producing heat pushing the air outwards, from high pressure to low pressure, as the air moves. Earth’s atmosphere.
These winds are not only unique in their speed and initial temperature, but also in the amount of material they blow up. The team found the M82 orbiting center for the equivalent of seven days each year. That presents something of a surprise to astronomers.
“If the wind is blowing slowly at the speed we measured, then we think it can boost the big, cool atmosphere by expelling four solar gases per year. But XRISM tells us that a lot of gas is still going out,” XRISM member Edmund Hodges-Kluck said in the statement. “Where do the extra three solar rays go? Do they escape out of the galaxy as hot gas in some other way? We don’t know.”
XRISM will continue to observe M82, which could help scientists solve this problem while simultaneously building a better model of the galaxy.
“Some of our first models of galaxies were developed in the 1980s, and we are finally able to examine them in ways that were not possible before XRISM,” team member Skylar Grayson of Arizona State University said in the statement. “It provides opportunities to find out why the model may not capture everything that happens in the real universe.”
The group’s findings were published on Wednesday (March 25) in the journal Nature.
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