// Workers AI · dad joke modeWhat did SN 1997D say to its date? You're a star.
 | This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (May 2022) |
 | |
| Event type | Supernova |
|---|---|
| Type II | |
| Date | 14 January 1997 by Duilia Mello |
| Constellation | Reticulum |
| Distance | ~43.78 million ly |
| Host | NGC 1536 |
| Other designations | SN 1997D |
SN 1997D was a supernova discovered on 14 January 1997 by Duília de Mello in NGC 1536 in the Reticulum constellation and is a first clearly identified example of atypical Type II supernova with a very low luminosity and expansion velocity.
Progenitor
[edit]There are two alternatives, a high-mass 25-40 solar masses star or smaller star with mass of 8-10 solar masses. As there is no evidence that a neutron star was formed during the collapse of the star, it is likely that star was in the upper spectrum of the mass.
Remnants
[edit]Observations of the light curve from SN 1997D showed no evidence of other energy sources in the expanding supernova envelope therefore it is unlikely that a neutron star was created. All the evidence leads to the creation of the stellar mass black hole of around 3 solar masses.
