In the vast expanse of deep space, a peculiar celestial event, resembling the energetic antics of the famed Tasmanian devil, has left scientists perplexed. A luminous fast blue optical transient (LFBOT) explosion, dubbed AT2022tsd, is at the center of this cosmic riddle, located approximately a billion light-years from Earth.

 What sets this space blast apart is its temporary nature and unparalleled energy, earning it the moniker "the Tasmanian devil."

Following the initial spectacle of the LFBOT, astronomers observed an intriguing phenomenon—bright flashes, each lasting a few minutes, but as powerful as the original explosion.

These puzzling star bursts were first detected globally in 2018. This led to scientific inquiry that a corpse of a star can reanimate.

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Tasmanian Devil lights up the sky

In a groundbreaking study published on November 15 in the online journal Nature, scientists propose that these post-LFBOT flashes might be the remnants of a dead star in the form of a black hole or neutron star. 

The lead author, Anna Y. Q. Ho, an assistant professor of astronomy at the Cornell College of Arts and Sciences, explained the unprecedented nature of these cosmic events.

"Some of the flares were as powerful as the original LFBOT, which means they were even more powerful than a normal supernova! We've never seen anything with this combination of duration, power, and wavelength, let alone in the aftermath of a mysterious cosmic cataclysm (the LFBOT itself). The 'engine' of these flares was almost certainly a neutron star or a black hole," Ho revealed.

The LFBOT, or Tasmanian devil star, stands out due to its unique characteristics. Unlike a normal supernova, LFBOTs exhibit distinctive features, emitting significantly more powerful light across the electromagnetic spectrum, including X-rays, radio waves, optical, and ultraviolet lights.

 Ho emphasized that these phenomena unfold rapidly, with signals appearing and vanishing over just a few days, in stark contrast to the gradual brightness changes observed in regular supernovae.

LFBOTs defy the norm by remaining active for extended periods. In the case of the Tasmanian devil, scientists observed 14 irregular light pulses over a 120-day period, speculating that this might only represent a fraction of the total emitted from the explosion.

Dying stars explode

Ho elaborated on the mystery surrounding LFBOTs, stating, "Even though normal supernovae are thought to involve the formation of a neutron star or black hole, we usually don't see a significant signal from that newly formed 'corpse.' In LFBOTs, that object remains very active for a long time—up to hundreds of days."

The study contemplates two possibilities regarding the origin of the flares. Possibility A suggests that the object formed in the LFBOT, is essentially a celestial corpse resulting from the explosion.

Another possibility is that the object was already present, and the LFBOT triggered its activation, potentially through a close encounter with another star, creating a unique "explosion."

The overarching mystery lies in understanding what powers LFBOTs and how stars transition in their afterlife. Ho expressed, "We might be seeing a completely different channel for cosmic cataclysms," highlighting the groundbreaking nature of these unusual explosions.

This cosmic enigma promises to offer new insights into stellar lifecycles, allowing scientists a rare opportunity to witness a star transitioning to its afterlife within a single system. 

LFBOTs, such as the Tasmanian devil star, open a gateway to observing cosmic events in a dynamic continuum—capturing stages from a living star to its explosive demise and subsequent remnants, providing a unique lens into the mysteries of our celestial surroundings.