The cosmic gamma-ray flashes astrophysicists spotted "reverse time"
Gamma-ray bursts are the brightest and most powerful explosions in the universe. Scientists do not know much about their nature, but a group of researchers from the University of Charleston (USA), examined data from several similar events claims that they contain anomalies that can be treated as a reverse flow of time. According to the scientists, their observations do not allow us to state this with complete probability, however, does not describe the phenomena of no theoretical model, according to the magazine article Astrophysical Journal.
The first gamma radiation discovered in 1968 by American satellites, intended for the registration of Soviet nuclear tests. Scientists can not say exactly what is the cause of them, but the duration of the observed gamma-ray bursts today can range from a few milliseconds to several hours.
Due to the discovery of gravitational waves created confronted neutron stars, we were able to identify at least one of their likely sources. Nevertheless astrophysicists argue that these sources should be much more. According to the assumptions, gamma-ray bursts may be echoes of a minimum number of cosmic cataclysms: the conversion of very massive stars in a compact neutron stars or the quark star (hypothetical objects, never found), or in the black holes, supernovas and simultaneously give birth hypernovae.
The complexity in the study of gamma-ray bursts is that we identify them can only when their beams are moving directly toward us. In this case, most of the emissions of gamma radiation (fortunately) come in a few billion light years away, so anticipate their appearance we can not. A further observation of them require the use of very sensitive equipment, often optical sense, so the problem is not excluded the presence of noise contained in the signal of the outbreaks. Yet this does not mean that in itself difficult to detect outbreaks. Just the opposite. Such an event is very difficult not to notice. For example, only one orbital observatory SWIFT space agency NASA for the period from 2004 to 2015, the year found nearly 1,000 gamma-ray bursts in different parts of the cosmos. The team of astrophysicists from the University of Charleston, led by John Hakkila decided to analyze data from six of the brightest gamma-ray bursts observed in the period from 1991 to 2000, with a tool BATSE Compton Observatory (USA), engaged in the study of gamma radiation. In the study, researchers have discovered a new and at the same time totally unexpected part of gamma-ray bursts. Depending on, via a telescope (low and high sensitivity) were monitored for these events, the spectrum of the space phenomena look differently. Researchers have noted that the excessively high brightness gamma flares may spread their spectrum and hide certain parts in its structure capable of supporting, causing these phenomena.
Analysis of data from all six outbreaks showed that they have a complex structure, unlike the typical flat spectrum of gamma-ray bursts. At the same time their signals contained anomalies, which, as it turns out, can not be explained from the perspective of a single theoretical model. These signals are a special wave-like structures that have been turned in time as if they were in the beginning of the end of the outbreak, and the end - in the first moments of a star explosion.
"We do not claim that this phenomenon does exist in reality and violates the laws of causality. It is possible that this radiation spawned particle beams or shock wave, is confronted with the release of gamma radiation and reflect back. Both the script does not describe a theoretical model, "- says John Hakkila.
In order to check for mistakes and coincidences, scientists once again cleared the data from the noise, but the static analysis confirmed the correctness of calculations, indicating the presence of not yet known to us in the birth process of gamma-ray bursts.
Scientists have put forward several hypotheses what he saw. In addition to the impact on the Jet something similar as Hakilla notes may occur if the flash light will pass through the gravitational lens generated by the newborn black hole. In addition, similar signals may occur if the gamma radiation emissions pass through several giant annular structures of the gas surrounding the dead star.
To find out which option is right for the new observations will help other gamma-ray bursts, and the study of such anomalies, the researchers note.