The star that vanished, M31-2014-DS1, represents a rare cosmic event where a massive star bypassed a supernova explosion to collapse directly into a black hole, observed through infrared brightening followed by a dramatic luminosity drop.
M31-2014-DS1 was previously one of Andromeda’s brightest stars until it vanished in 2016. NASA’s NEOWISE data tracked its infrared surge and subsequent collapse, marking a rare observation of a failed supernova event.
Unlike typical stellar deaths, this massive object bypassed the explosive stage to form a black hole directly. Scientists used this discovery to develop new theories on how convection influences core collapse.
Discovering The star that vanished
The star that vanished refers to M31-2014-DS1, a massive object in Andromeda that collapsed into a black hole without a supernova. This occurs when a failed neutrino shockwave allows core implosion while convective forces in the outer layers cause a slow, non-explosive expulsion of stellar material.
Analysis of NASA NEOWISE data confirms the object’s visible output plummeted to one ten-thousandth of its original state by 2023. This transformation provides a benchmark for understanding stellar black hole formation.
M31-2014-DS1: Direct Black Hole Collapse
Core collapse occurred after nuclear fusion ceased to balance the inward pull of gravity within the star that vanished. Instead of a traditional explosion, the neutrino-powered shock failed to overcome gravity, forcing nearly all material to fall back into a dense newborn black hole rather than blasting into space.
Timeline of Stellar Disappearance
Monitoring from 2005 to 2023 revealed that infrared light intensified in 2014 before the star that vanished saw its visible output drop to one ten-thousandth of its former luminosity by 2023.
| Observation Year | Light Spectrum | Relative Brightness | |
| Pre-2014 | Visible / NIR | 100% (High Luminosity) | |
| 2014 | Infrared | Brightening Phase | |
| 2016 | Visible | Significant Drop | |
| 2022-2023 | Visible / NIR | 0.01% (1/10,000th) |
Scientific importance and theories
This event introduced a theory emphasizing convection, where temperature differences drive gas movement from the star’s center to its cooler outer regions. Unlike traditional implosion models, this process explains why the dimming happens over decades rather than months, as angular momentum causes material to circularize.
Convective Forces and Accretion Rates
Convection prevents a total immediate implosion, allowing only one percent of the atmosphere to fall into the star that vanished initially. This orbiting material creates a lingering infrared glow that will remain visible to the James Webb Space Telescope for several decades.
Patterns in Failed Supernovae
Researchers have identified that these silent collapses are not isolated anomalies but represent a specific class of stellar deaths. Evidence suggests other massive stars follow this evolutionary path, avoiding the typical bright death usually associated with high-mass objects.
- NGC 6946-BH1 followed a nearly identical non-explosive collapse pattern ten years ago.
- Direct collapse bypasses the neutrino-powered shock wave required for a supernova.
- Convective gas prevents immediate mass fallback into the core.
Implications and what comes next
Long-term infrared monitoring will help astronomers determine which stars are destined for silent deaths. Future James Webb Space Telescope data will track the slowly fading debris to refine black hole formation models.
Conclusion
Identifying the star that vanished provides a rare window into the birth of black holes without the shroud of a supernova. Understanding these “failed” explosions is vital for mapping the final stages of stellar evolution. Explore more on our YouTube channel—join NSN Today.
