Dumbbell Nebula - M27 (Bruce Rohrlach)

Dumbbell Nebula - M27

Data collected from Messier 27 (‘Dumbbell nebula’ or the ‘Apple Core nebula’) has been sitting on my computer while I’ve waited to renew the Astro Pixel Processor software license used to process my light frames. This data was collected over the course of two nights on 26 and 27 September, and have over the holiday break got around to processing the Ha (1.5 hours, 30 sec subs) and O3 (1.5 hours, 30 sec subs) spectral data. The data are rendered in the HOO palette such that red areas are rich in hydrogen gas while cyan areas are rich in oxygen gas.

This planetary nebula was low (29 degrees above the horizon) in the northern sky at Melbourne’s latitude on the date imaged. The narrowband filters help cut through (exclude) the haze of light pollution when imaging so shallowly above the outer northeast suburbs.

This planetary nebula is a supernova, a star that exploded. When the star ran out of elements lighter than Fe to fuse, gravitational attraction exceeded the diminishing outward pressure of fusion reactions, so a runaway inward implosion occurred onto the central iron-rich core of the star, before it rebounded as a supernova, dispersing much of its stellar mass into the surrounding cosmos as shells of expanding gas. Some of the most beautiful and varied DSO’s (Deep Sky Objects) to be imaged through a suitable telescope are these supernova remnants. The small white dot at the very center of the expanding shells of gas in this image is a white dwarf star (the dense remnant corpse of the original star) and is the largest known white dwarf.

Depending on what criteria is used to calculate its age, this star went supernova somewhere between 3000 and 14600 years ago.

Imaged from our backyard in Melbourne - Skywatcher 8 inch/f5 Newtonian.

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Status	Basic success
Started	...
Astrometry.net job	5408587
PixInsight job	n/a
PixInsight queue size	n/a
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