Radio signals detected from the exoplanet Beta Pictoris b, located approximately 63 light years away from Earth, opened the door to a new field of research in the world of science. However, experts warned against claims that the signals were evidence of extraterrestrial life.
Istanbul University (IU) Astronomy and Space Sciences Department Astrophysics Department Lecturer Assoc. Dr. In his statement, Hasan Hüseyin Esenoğlu stated that the signals in question may arise from natural processes related to the planet's magnetic field.
RADIO SIGNALS WERE DETECTED FROM A DISTANCE OF 63 LIGHT YEARS
The exoplanet named Beta Pictoris b, located in the Pictor Constellation, was observed by the MeerKAT radio telescope array in South Africa.
The observations detected fast, repetitive and strongly circularly polarized radio bursts coming from the planet's location, as well as continuous radio emission.
Stating that the signals were observed in the frequency range of approximately 0.85 to 3.5 gigahertz, Esenoğlu emphasized that it is not scientifically possible to associate them with extraterrestrial life.
Esenoğlu said, "The radio signal coming from the exoplanet carries the trace of the magnetic field rather than the alien message. It is not scientifically possible to associate the radio signals detected from the Beta Pictoris b exoplanet, which is approximately 63 light years away from Earth, with extraterrestrial life."
"RADIO SIGNAL DOES NOT MEAN RADIO MESSAGE"
Stating that the signals may be related to the planet's strong magnetic field and the formation of aurora (polar lights), Esenoğlu stated that the emission may be caused by the cyclotron maser mechanism that occurs as a result of the interaction of high-energy electrons with magnetic fields.
Reminding that planets with magnetic fields in the Solar System, especially Jupiter, also produce natural radio waves, Esenoğlu said, "The critical distinction here is this. A radio signal does not mean a radio message."
Esenoğlu said that if the research passes peer review and the findings are confirmed, this could be the first example in which auroral radio emission originating from an exoplanet has been directly detected.
THE PLANET'S MAGNETIC FIELD CAN BE EXAMINED
Stating that based on the observed radio frequencies, the magnetic field in the planet's emission region is estimated to be at least approximately 1.25 kilogauss, Esenoğlu emphasized that the main importance of the discovery is that it allows the examination of the magnetic fields of distant planets.
Stating that magnetic fields provide important information about the protection of planetary atmospheres against stellar winds, their internal structure and long-term development, Esenoğlu noted that Beta Pictoris b is a gas giant several times larger than Jupiter, located in a young star system.
For this reason, he stated that the planet is not one of the priority targets in research for extraterrestrial life.
LIFE OUTSIDE EARTH HAS NOT BEEN CONFIRMED YET
Stating that there is no confirmed scientific evidence yet regarding the existence of life outside Earth, Esenoğlu said that thanks to the research carried out in the last 30 years, knowledge about the diversity of planets in the universe has increased significantly.
Stating that while there were no confirmed planets outside the Solar System in the early 1990s, more than 6 thousand exoplanets are known today, Esenoğlu stated that thousands of candidate planets are waiting to be confirmed.
"Planets are extremely common in our galaxy. The real question is whether there is life on any of them," Esenoğlu said.
BEING IN A LIVIBLE ZONE IS NOT ENOUGH
Stating that scientists first investigate whether planets are in the habitable zone of their stars in the search for extraterrestrial life, Esenoğlu explained that this zone represents the distance that would allow liquid water to exist on the surface under suitable atmospheric conditions.
However, emphasizing that a planet being in the habitable zone does not mean that it contains life, Esenoğlu said that molecules such as oxygen and methane detected in the atmosphere cannot be considered evidence of life on their own.
Pointing out that the molecules in question can also be formed through geological and atmospheric processes, Esenoğlu noted that scientists examine more than one finding together to evaluate life.
METEORITES ARE ALSO EXAMINED IN THE SEARCH FOR LIFE
Stating that research on extraterrestrial life is not limited to distant planets, Esenoğlu stated that meteorites that fell to Earth are also examined in laboratory environments.
Stating that minerals such as olivine, enstatite, pyroxene and plagioclase were determined in the Çanakkale meteorite in a research conducted at Istanbul University, Esenoğlu said that findings indicating aliphatic hydrocarbons were also found in infrared examinations.
However, he stated in the 2012 study that it could not be determined whether these structures resulted from the original composition of the meteorite or from contamination after it fell to Earth.
"WE DID NOT FIND AN ALIEN MESSAGE"
Emphasizing that the signals coming from Beta Pictoris b should be re-observed and confirmed with independent telescopes, Esenoğlu made the following assessment regarding the scientific importance of the discovery:
"We did not find an alien message. But for the first time, we may have started to listen directly to the magnetic world of another planet. This is not a discovery to be underestimated. The question of whether we are alone in the universe is still unanswered. The most solid sentence that science can say today is perhaps this: We have not found life outside Earth, but we now know better than ever where and how to look for it."
