Supernova SN2022hrs spectrum! (Remco Kemperman)

Celestial hemisphere: Northern · Constellation: Virgo (Vir) · Contains: IC 3684 · M 60 · NGC 4637 · NGC 4638 · NGC 4647 · NGC 4649

Supernova SN2022hrs spectrum!, Remco Kemperman

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Supernova SN2022hrs spectrum!

Revision title: SN2022hrs spectrum and LRGB image

Link: https://www.instagram.com/p/CcxuqasMaSf/?utm_source=ig_web_copy_link

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Supernova SN2022hrs spectrum!

Revision title: SN2022hrs spectrum and LRGB image

Link: https://www.instagram.com/p/CcxuqasMaSf/?utm_source=ig_web_copy_link

It worked! I have a spectrum of the supernova at M60! Captured in the backyard with a staranalyzer filter in front of the camera.

The supernova shows a clear absorption band of ionized silicon (Si II). This is typical of a type 1a supernova, i.e. a white dwarf that has exceedee its maximum mass (Chandrasekhar mass, 1,4 suns) and suddenly undergoes a thermonuclear explosion. The other type of supernovae, from collapsing massive stars, do not have this feature.

The silicon band is in the lab at 6150 Ångstrom. Here the center of the absorption band is at 6115 Å, so shifted to blue. A simple calculation shows that the speed towards us is approximately 1700 km/s!!! for that point.
But the band is much wider, the part of the shell comming straight at us is much more blue shifted (to the left in the spectrum, to 5970 in my graph).
That corresponds to 8,800 km/s, and is within the typical speed range of this type of nova, from 5,000 to 20,000 km/s.
8,800 km/s is almost 3% of the speed of light.

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Title: SN2022hrs spectrum and LRGB image

Description: The day after (24-04-2022) I captured an LRGB image of the nova, inside the virgo cluster in NGC 4647

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Supernova SN2022hrs spectrum!

Revision title: SN2022hrs spectrum and LRGB image

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Revision title: SN2022hrs spectrum and LRGB image

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Supernova SN2022hrs spectrum!

Revision title: SN2022hrs spectrum and LRGB image

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