Gum 16 (a very narrow view) (Daniel Stern)

Celestial hemisphere: Southern · Constellation: Vela (Vel) · Contains: HD72552 · HD72576 · HD72648 · HD72733 · HD72816

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Gum 16 (a very narrow view)

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Gum 16 (a very narrow view)

This is a very narrow field view of the emission nebula Gum 16, the Vela supernova remnant (SNR), which is a small part of the even bigger Gum Nebula (Gum 12). My hope was to capture the spongy filamentary texture of the hydrogen alpha (Ha) that is represented by the reddish color in this image, and the oxygen 3 (Oiii) component, which is the teal color. Generally, the filamentary structure seen in the image is caused by the interaction between the expanding shockwave from the supernova explosion and the surrounding interstellar medium (ISM). When a massive star explodes in a supernova, it releases an enormous amount of energy, creating a shockwave that expands outward into space. As this shockwave moves through the ISM, it sweeps up and compresses the surrounding gas and dust. This compression can trigger the formation of dense, cooler regions within the remnant, which appear as filaments. These filaments are often composed of ionized gas (plasma), singly ionized hydrogen (Ha) and doubly ionized oxygen (Oiii), and are typically brighter and denser than the surrounding material.Additionally, magnetic fields play a role in shaping the filaments. The shockwave can amplify existing magnetic fields in the ISM, causing them to become tangled and twisted. This can lead to the formation of complex filamentary structures as the magnetic fields interact with the ionized gas.The combination of shock compression, cooling, and magnetic field effects results in these intricate and beautiful filamentary structures.

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Status	Advanced success
Started	...
Astrometry.net job	9400099
PixInsight job	6IQ96XDQ4HWZKSNL5ZV35DZ4DFF5QQQ2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	08h31m55s.882
RA (top/left)	08h33m44s.765
RA (top/right)	08h30m05s.600
RA (bottom/right)	08h30m05s.718
RA (bottom/left)	08h33m47s.415

Dec (center)	-43°51′01″.56
Dec (top/left)	-43°30′58″.55
Dec (top/right)	-43°31′13″.51
Dec (bottom/right)	-44°10′55″.30
Dec (bottom/left)	-44°10′42″.12

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Gum 16 (a very narrow view)

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Gum 16 (a very narrow view)

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