Did the neutron star create this hole in the nebula as the neutron star was making its escape?
We can tell an expanding supernova shell by the fact that at least parts of its outer edges are blue or green from doubly ionized oxygen, OIII, as the expanding shell slams into the surrounding medium:
"Figure 4. Total intensity image of the SNR CTB 1 from the Canadian Galactic Plane Survey (CGPS) at 1.42 GHz. False colors start at brightness temperatures of 5.5 K and the maximum is at 8.9 K. The angular resolution and field-of-view are approximately 1′ and 1.9◦×1.1◦, respectively. A green cross marks the location of the geometric center of the SNR (Landecker et al. 1982) whiles circles indicate the position of PSR J0002+6216 (Clark et al. 2017). A faint tail of emission is visible from the PSR to the SNR, pointing back toward the geometric center. The inset is our higher angular resolution 20-cm VLA image of the dashed region taken from Figure 3."
Re: APOD: The Medulla Nebula Supernova Remnant (2023 Apr 24)
Posted: Mon Apr 24, 2023 2:25 pm
by JohnD
Whoever named this "The Medulla" was sadly lacking in anatomy! While it looks nothing like a medulla, it closely resembles the Glomerulus, the primary filtration apparatus in the mammalian kidney.
John
Re: APOD: The Medulla Nebula Supernova Remnant (2023 Apr 24)
Posted: Mon Apr 24, 2023 2:40 pm
by orin stepanek
Oops; I was thinking Medusa!
This does make a nice APOD!
Re: APOD: The Medulla Nebula Supernova Remnant (2023 Apr 24)
"Figure 4. Total intensity image of the SNR CTB 1 from the Canadian Galactic Plane Survey (CGPS) at 1.42 GHz. False colors start at brightness temperatures of 5.5 K and the maximum is at 8.9 K. The angular resolution and field-of-view are approximately 1′ and 1.9◦×1.1◦, respectively. A green cross marks the location of the geometric center of the SNR (Landecker et al. 1982) whiles circles indicate the position of PSR J0002+6216 (Clark et al. 2017). A faint tail of emission is visible from the PSR to the SNR, pointing back toward the geometric center. The inset is our higher angular resolution 20-cm VLA image of the dashed region taken from Figure 3."