XMM-Newton Reveals Million-Degree Gas in Galaxy Cluster

What Did XMM-Newton Discover in Abell 2390?

Scientists have used XMM-Newton’s X-ray observations in combination with Euclid’s image to reveal the intense, million-degree gas in the massive galaxy cluster Abell 2390. This observation showcases the blue glow of blazing hot gas filling the space between galaxies.

How Hot is the Gas in Abell 2390?

The temperature of the gas in Abell 2390 ranges from 10 to 100 million degrees Celsius. In this environment, electrons are stripped from the atoms, ionizing the gas and producing X-rays. The center of the cluster is notably brighter, indicating hotter and more concentrated gas.

Why Study the Hot Gas in Galaxy Clusters?

By mapping and studying the hot gas in Abell 2390, astronomers gain insights into how galaxy clusters grow and how galaxies interact within this dynamic environment. The behavior of the hot gas reveals much about the evolution and interaction of galaxies.

What Makes Up Most of Abell 2390's Mass?

Abell 2390 is predominantly composed of dark matter, making up about 80% of its total mass. The remaining 'normal' matter is primarily in the form of scorching hot gas (15%), with galaxies accounting for only a few percent. This composition is similar to other galaxy clusters.

What Causes the Curved Arcs in Euclid’s Image?

The gigantic, curved arcs seen in Euclid’s image result from gravitational lensing, where light from more distant galaxies is bent and distorted by the matter in the foreground. This technique helps map the distribution of dark matter within the cluster and beyond.

Where Can You Find More Information About Abell 2390?

XMM-Newton's observations of Abell 2390 from 2001 are available in the ESASky database. Euclid's recent observations can also be found in ESASky, providing a comprehensive view of this intriguing galaxy cluster.

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