A team of astronomers has used the Submillimeter Array (SMA) to map carbon monoxide gas surrounding the Ring Nebula, revealing its true shape as an ellipsoid. The study, led by Chester F. Carlson from the Rochester Institute of Technology and Professor Joel Kastner from the Centre for Imaging Science and School of Physics and Astronomy, provides a new understanding of this well-known planetary nebula.
The Ring Nebula as captured in visible light by Hubble Space Telescope, left; in radio emission from CO molecules by the Submillimeter Array , center; and in the infrared by the James Webb Space Telescope , right. The image is overlaid with contours of emission from CO that is moving perpendicular to our sight line, showing how the molecular gas imaged by the SMA envelopes the ionized gas imaged by JWST.
The Ring Nebula is a wonderful example of a planetary nebula. It’s located in the constellation Lyra, about 2,000 light-years from Earth and its progenitor star shed its outer layers 6,000 years ago leaving behind the core to become a hot white dwarf. Intense ultraviolet radiation from the white dwarf excites the surrounding gas, causing it to emit green and blue light due to ionized oxygen and nitrogen.
A team of astronomers led by Chester F. Carlson from the Rochester Institute of Technology and Professor Joel Kastner from the Centre for Imaging Science and School of Physics and Astronomy have been exploring the shape of M57. They used the Submillimeter Array to map the emission of carbon monoxide gas in the nebula. The carbon monoxide surrounds the hot gas and dust that appears in classic images we are all familiar with seeing.
This image shows two of the Atacama Large Millimeter/submillimeter Array 12-metre antennas. ALMA has 66 antennas that work together as an interferometer.
RING NEBULA ASTROPHYSICS PLANATARY NEBULAS SUBMILLIMETER ARRAY STAR DEATH
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