NASA’s Kepler Space Telescope has taken an image which depicts a very uncommon event, namely, the dying moments of a star caught inside a thick coat of interstellar dust and gas, which resulted in a very strong blast which has never been seen before in any studied supernovae. The star was quickly assimilated as a “cocoon star” due to its surrounding gas and dust layers. Besides, during this study, the astronomers elaborated a new theory regarding the Fast-Evolving Luminous Transient phenomenon.
The cocoon star” explosion led to a “Fast-Evolving Luminous Transient” event
Scientifically named KSN 2015K, the “cocoon star” closely passed near its death for a few times before.
When the star has exploded, eventually, the blast’s kinetic energy crashed on the dust and gas particles forming the surrounding layer of the star, where it turned into light, instantaneous.
Such an occurrence is known in the astronomical slang as a “Fast-Evolving Luminous Transient”, usually abbreviated FELT.
FELT has puzzled astronomers for many years who are not completely comprehending the speed at which this event is forming and its brief lifespan. Luckily, just recently, astronomers were able to understand the whole nature of this event and their conclusions crush the previously-elaborated theories on FELTs.
“Fast-Evolving Luminous Transient” events are not the results of gamma-ray bursts
Until now, astronomers considered FELTs as rare phenomena caused by gamma-ray burst which, after a star’s explosion, enlight the surroundings particles of gas. In fact, all this theory has its foundation in the theory of supernovae formation.
However, the recent study suggests that the theory of supernovae formation is not applicable to the Fast-Evolving- Luminous Transient event. According to one of the authors of this new research, “this is a new way for massive stars to die and distribute material back into space.”
Even more, the gas and dust particles that formed the “cocoon star” surrounding layers were not there since the beginning but the star streamed them before dying in a massive blast which caused the occurrence of the Fast-Evolving Luminous Transient event. All these have been captured by Kepler Space Telescope.