A very strange story of a galaxy destruction is haunted astronomers
After about one billion years after the emergence of life in the universe from nothing appeared galaxy size several times larger than our own. However, after a further half a billion years - that is, even faster than it took life on our planet in order to doevolyutsionirovat in person - this galaxy become completely dead disk, which no longer appear new stars. Sounds very interesting, is not it?
The international team of astronomers discovered the galaxy ZF-COSMOS-20115 using the Keck telescope, located on the Hawaiian volcano Mauna Kea. Our own galaxy, the Milky Way is still very active and forms new stars even after 13 (or so) billion years. And then the galaxy that were born the day before yesterday (on space standards, of course) and have virtually died out after a moment. The question is that our current space theory quite willing to explain this phenomenon.
"We found a galaxy that appeared in the universe is one of the first, but died almost immediately after his birth. It is observed the formation of new stars, "- said the chief science writer Carl Glazerbruk of Australian Swinburne University of Technology.
"The very same galaxy as massive as about 5 times our own Milky Way, but it is about 12 times less. When detecting it was difficult to believe that such objects can exist at all, since it is contrary to all possible and impossible ideas galaxy formation. "
In order to determine her age Glazerbruk associates conducted a monitoring of its spectral lines (light in different wavelengths). With the expansion of the universe is increased and the length of light waves that vary in color, changing to red range. Dispersion occurs, similar to the phenomenon of receding from you sirens ambulances. Therefore, the galaxy astronomers look much redder than it actually is. By measuring this "red shift", scientists can determine how much time there is an object since the hypothetical event of the Big Bang. In this case, the figure is 1, 65 billion years. That is, the researchers monitored the galaxy as it was 12 billion years ago. But this does not mean that this galaxy is 12 billion light years. In fact, it is from us much further, because the space between it and the rest of the universe is constantly expanding.
Finding out the age of the disk, scientists have wondered why this small but massive galaxy died so soon after his birth? The answer is: ¯ \ _ (ツ) _ / ¯
Important to note that this study is not only engaged in the galaxy group Glazerbruka. Similar work was conducted by a team of astronomers Reinhard Genzel of the German Institute for Extraterrestrial Physics of the Max Planck Society, which also failed to reach a clear conclusion.
"Even in a radius of hundreds of millions of light years away can be observed galaxy collisions. When such events gas contained in the colliding galaxies can be displaced. As a result, one of the galaxies "squeezed" to such an extent that it becomes completely dead. "
But that strange group Glazerbruka actually found several similar galaxies. Although these galactic corpses really are considered by scientists as a very rare phenomenon, hardly in their lives lay the blame only on collisions with other galaxies.
"The merger or collision may not be the obvious explanation for this phenomenon. In this case, it would be talked about some very very atypical ultrafast transition of a substance from one galaxy to another. This is not an explanation, which we expected, "- says Hansel, while noting" impressive "set of data collected Glazerbruka group.
Glazerbruka team is going to continue to collect data and conduct additional observations with all of the same telescope Keck, and then the space telescope named after James Webb, who very soon will replace albeit outdated, but still keep the hearty telescope "Hubble".
"Then we find out what's what. We need to find a theory that can explain such phenomena. Since it affects our more complete understanding of how galaxies form and evolve, "- sums up Glazerbruk.