A new image of supernova remnant W44, which combines far-infrared and X-ray data from ESA’s Herschel and XMM-Newton space observatories, shows the aftershock of a stellar explosion rippling through space. W44 is about 10,000 light-years away, in the dense star-forming clouds of the constellation of Aquila, the Eagle, and is one of the best examples of a supernova remnant interacting with its parent molecular cloud.
All that remains of the stellar behemoth is the spinning core of a neutron star, or pulsar. Identified as PSR B1853+01, the pulsar is the bright point to the top left in W44, colored light blue in the image below. It is thought to be around 20,000 years old and as it rotates it sweeps out a wind of highly energetic particles and beams of light ranging from radio to X-ray energies.
The center of the supernova remnant is also bright in X-rays, coming from the hot gas that fills the shell, at temperatures of several million degrees. Dense knots of high-energy emission reflect regions where heavier elements are more commonly found. At the cooler edge of the cavity, gas is swept up as the supernova remnant propagates through space.
Supernova remnant W44 captured by ESA’s Herschel and XMM-Newton. Credits: Herschel: Q. Nguyen Luong&F. Motte, HOBYS Key Program consortium, Herschel SPIRE/PACS/ESA consortia. XMM-Newton: ESA/XMM-Newton
At the top right of the expanding shell, there is a smaller cavity, with the shock from the supernova remnant impacting the bight arc-shaped feature. This region is filled with hot gas that has been ionized by the intense ultraviolet radiation from embedded young massive stars.
Herschel’s far-infrared eyes can also seek out regions of gently heated gas and dust further from W44, where new stars are congregating. Examples include the arrowhead-shaped star-formation region to the right of W44, which appears to point to another trio of intricate clouds further to the right and above.
More broadly, a number of compact objects scattered across the scene map the cold seeds of future stars that will eventually emerge from their dusty cocoons.
Finally, diffuse purple emission towards the bottom left of the image provides a glimpse of the Galactic plane.
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- The Five Stages Of A Dying Theory
- Order Patterned With Chaos - How Climate Is Predicted For Decades - With Exact Forecasts Only For Days
- Something is wrong in the Arctic
- Should Pregnant Women Be Concerned About BPA?
- Is The X(5568) A True Resonance ?
- Determining Prostate Cancer Risk With A DNA Methylation Biomarker
- Are Marijuana Warning Labels Needed? Users Say Yes
- "Just to say that I agree with Patrick. Science is not settled by voting and public opinion. Newton..."
- "We should name 2013 FY27 after the Potawatomi God of creation, Kche Mnedo. The Potawatomi are native..."
- "Another reminder. Please can you discuss the ideas rather than call people liars? Neither..."
- "A vigorous supporter of the Petition Project since its inception in 1998, Professor Seitz died..."
- "The 30,000 Global Warming Petition Is Easily-Debunked PropagandaNo scientist worth his salt would..."
- NHL's Concussion Protocol, a Closer Look (Part 2)
- Uh-Oh — Smokers Are Drinking the 'Additives Cause the Cancer' Kool-Aid
- A New Way to Prevent HIV Infection
- A Novel Way to Stop HIV
- A Very Cool Way To Treat Carbon Monoxide Poisoning
- It’s Not Brain Surgery, But do You Know What is? Brain Surgery!