Chinese scientists unravel the universe organic macromolecule mysteries
Scientists have found, in the chemical factories around young stars in the universe, can produce more far than we previously thought to complex molecules. We have detected on comets and planets relatively complex carbon molecules, these molecular structures should be in the other regions of the solar system, but according to the latest published an article in the paper in the journal nature, the universe in the spectrum part “not recognized by the infrared radiation” may in fact come from young stars around the formation of large molecules. Scientists also believe that this is possible on Earth formed early on had been taken to Earth.
Chemical action occurring in the universe we know very little about, scientists have only to guess the natural world is very much on how to make the synthesis of complex molecules. The scientific community has to understand before, relatively simple molecules can form around the young star, and the slightly more complicated molecules can also later formed at a relatively low temperature environment.
Problems seem even more mysterious is that we within the Milky Way Galaxy and the universe not recognized by the other regions are detected infrared radiation, astronomers might as well call them “unidentified infrared radiation” (UIE). This vibration of infrared radiation from molecules, macromolecules internal relative vibration of atoms, they will absorb specific wavelengths of light waves, then went out again in the form of infrared radiation.
Each key is like a piano’s tone is different, as each molecular vibration has its own unique features, which also allowed the scientists to by spectral “fingerprint” to identify a molecule, but “unknown infrared radiation” display signals too complex, and appears to be a large group of signal mixed together, making interpretation difficult.
Star power
Since the early 70 ‘s, the astronomers begin to guess what would be this complex signal molecules. Recently they have begun to suspect this may be due to polycyclic aromatic hydrocarbons (PAHs) . This is the structure of carbon atoms and hydrogen atoms combine to form complex structures, burnt in the meat of this material, and is a carcinogen.
However need to clarify the point is, these macromolecules found does not mean that their structure was very complex, people are already in many regions of the solar system, such as comets and the surface of Titan, found a similar or more complex macromolecules. Significance of this discovery is that it is in the nascent regional formation around the star.
Sun Kwok, Professor of astronomy at the University of Hong Kong told reporters: “the traditional view is that this material is within the solar system, ‘ local ‘ form. “Professor Guo and his colleague Professor Zhang Yong cooperation, with the United States on NASA’s Spitzer Space Telescope conducted a study of newborn stars, and with it two new star light than the right, increased brightness of a star is a white dwarf produced by the explosion. Then they started to construct a hypothetical molecular models, and combined with measured data keeps changing its structure and composition, until simulations showed their vibration characteristics and actual measurement data to achieve the best match so far.
Simulation results show that this signal does not come from simple polycyclic aromatic hydrocarbons, polycyclic aromatic hydrocarbons are very similar but a and cyclic aromatic structure, and has a kink FAT chain component.
Professor Sun Kwok said: “the significance of our research is that we have identified this organic substance found in the solar system and planetary nebulae there exists a high degree of similarity between such substances. This implies that in the solar system may contain residual interstellar organisms. ”
In addition, it could also mean people think this type of complex macromolecules is a rare and difficult to understand the complicated process of opinion is wrong, this phenomenon may be prevalent in many stars in the surrounding area.
But the United States John · Kali·Lisi Hopkins University applied physics laboratory (Carey Lisse) said that while there may be many young stars are thrown to the surrounding space of complex organic molecules, but who are more older, even dying stars might have the same phenomenon, even more so.
He referred to an article recently published in the Astrophysical Journal article, which is the United States Naval Research Laboratory wing da·situerte (Rhonda Stroud) do work. In this study, Stuart proved when the supernova shock wave through the interstellar medium to produce aromatic substances and lipid molecules.
Such a study for compound the problem, it is difficult to understand whether and how to get to these complex molecules of other solar systems, such as our solar system. “Want to understand these complex organic substances that the original was born in the solar system is also the ruins of the interstellar medium in history, this is an interesting problem, and we don’t understand the debate on this issue will be about where we, yet it is interesting is that they now have some clues. ”
He said: “the young star in the ‘ reseeding ‘ the role of the organic molecules in the process is complex. We still don’t know how much they have destroyed in the process and how creating, but any interested they do play a role in the diffusion process organic matter in the interstellar medium clues is exciting because it means that they may have played role in life forms. ”
Rhys believes this article this article was published in the papers in the journal nature is a major step in the right direction, but it will never be a final step. (Text/Sina technology)
This study found that the complex organic molecules are aromatic and combination of lipid molecules
Studies show that young stars are in the surrounding interstellar medium projectile a great deal of material
The study’s Chief Scientist: Professor, school of physics at the University of Hong Kong Sun Kwok