A stream of red hydrogen streams from the spiral galaxy D100 as it heads toward the center of the giant coma galaxy Clusters crashes. Luminous blue lumps of young stars can be seen in the middle of the tail, where there is enough hydrogen gas left to recharge the star.
Photo credits: Hubble Image: NASA, ESA, M. Sun (University of Alabama) and W. Cramer and J. Kenney (Yale University); Subaru Image: M. Yagi (National Astronomical Observatory of Japan)
NASA's Hubble Space Telescope has taken a breathtaking new view of a spiral galaxy traveling too close to the massive Coma galaxy cluster and just being released from gas.
The spiral galaxy called D1
The tail of the galaxy consists of dust and hydrogen gas. As the galaxy moves through intergalactic material surrounding the cluster, gas and dust are expelled from the galaxy. [Celestial Photos: Hubble Space Telescope’s Latest Cosmic Views]
At some point, D100 will run out of hydrogen gas, which the galaxy needs to form new stars, and is said to be a dead relic.
"This galaxy is particularly extreme. An example of processes common in massive clusters, where a galaxy changes from a healthy spiral of full star formation to a red and dead galaxy," said William Cramer, lead author of the study and researchers at Yale University in Connecticut. "The spiral arms are disappearing, and the galaxy has no gas and only old stars – this phenomenon has been known for decades, but Hubble provides the best images of galaxies going through this process."
Researchers estimate that D100 has it The process, also known as dynamic pressure stripping, took about 300 million years.
While D100 is one of many galaxies in this situation, one factor differs from others seen and modeled by astronomers: D100's tail is much smoother and clearer than most of these galaxies, according to the study.
This is a surprise because a tail like this is not seen in most computer simulations , Most of the galaxies that undergo this process are more of a mess, "said Jeffrey Kenney, a co-author of the study, who is also at Yale University." The clean edges and filamentary structures of the tail suggest that magnetic fields are one play an outstanding role in shaping. Computer simulations show that magnetic fields form filaments in the gas of the tail. Without magnetic fields, the tail is more lumpy than thread-like. "19659005] Hubble data showed that the gas stripping process began at the outer edges of the galaxy and is now moving toward the center, with hot, glowing, blue lumps of young stars also appearing in the image The brightest lumps are in the middle of the tail, where there is enough hydrogen gas left to recharge the star, according to the statement.
However, the researchers estimated that D100 would lose its spiral structure altogether in a few hundred million years, and only old ones The results were published on January 8 in the Astrophysical Journal.