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louis vuitton bag cheap ALMA Finds Ingredient of Life Around Infant Sun

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Two teams of astronomers have harnessed the power of the Atacama Large Millimeter/submillimeter Array (ALMA) to detect the prebiotic complex organic molecule methyl isocyanate [1] in the multiple star system IRAS 16293 2422. One team was co led by Rafael Martn Domnech at the Centro de Astrobiologa in Madrid, Spain, and Vctor M. Rivilla, at the INAF Osservatorio Astrofisico di Arcetri in Florence, Italy; and the other by Niels Ligterink at the Leiden Observatory in the Netherlands and Audrey Coutens at University College London, United Kingdom. This is the first ever detection of this prebiotic molecule towards solar type protostars, the sort from which our Solar System evolved. The discovery could help astronomers understand how life arose on Earth.

“This star system seems to keep on giving! Following the discovery of sugars, we’ve now found methyl isocyanate. This family of organic molecules is involved in the synthesis of peptides and amino acids, which, in the form of proteins, are the biological basis for life as we know it,” explain Niels Ligterink and Audrey Coutens [2].

ALMA’s capabilities allowed both teams to observe the molecule at several different and characteristic wavelengths across the radio spectrum [3]. They found the unique chemical fingerprints located in the warm, dense inner regions of the cocoon of dust and gas surrounding young stars in their earliest stages of evolution. Each team identified and isolated the signatures of the complex organic molecule methyl isocyanate [4]. They then followed this up with computer chemical modelling and laboratory experiments to refine our understanding of the molecule’s origin [5].

ALMA has observed stars like the Sun at a very early stage in their formation and found traces of methyl isocyanate a chemical building block of life. This is the first ever detection of this prebiotic molecule towards a solar type protostar, the sort from which our Solar System evolved. The discovery could help astronomers understand how life arose on Earth. This image shows the spectacular region of star formation where methyl isocyanate was found. The insert shows the molecular structure of this chemical. Credit: ESO/Digitized Sky Survey 2/L. Calada. Download image

IRAS 16293 2422 is a multiple system of very young stars, around 400 light years away in a large star forming region called Rho Ophiuchi in the constellation of Ophiuchus (The Serpent Bearer). The new results from ALMA show that methyl isocyanate gas surrounds each of these young stars.

Earth and the other planets in our Solar System formed from the material left over after the formation of the Sun. Studying solar type protostars can therefore open a window to the past for astronomers and allow them to observe conditions similar to those that led to the formation of our Solar System over 4.5 billion years ago.

This artist impression gives a very close up view of what these prebiotic molecules towards a solar type protostar look like. The discovery could help astronomers understand how life arose on Earth. Credit: ESO/L. Calada. Download image

Rafael Martn Domnech and Vctor M. By finding prebiotic molecules in this study, we may now have another piece of the puzzle in understanding how life came about on our planet.”

This chart shows the location of the Rho Ophiuchi star formation region in the constellation of Ophiuchus (The Serpent Bearer). The star Rho Ophiuchi, which gives the region its name, is marked with the Greek letter rho (). The position of IRAS 16293 2422, a young binary star with similar mass to the Sun, is marked in red. Credit: ESO, IAU and Sky Telescope. Download image

Niels Ligterink is delighted with the supporting laboratory results: detecting molecules we also want to understand how they are formed. Our laboratory experiments show that methyl isocyanate can indeed be produced on icy particles under very cold conditions that are similar to those in interstellar space. This implies that this molecule, and thus the basis for peptide bonds, is indeed likely to be present near most new young solar type stars. This picture was created from images in the Digitized Sky Survey 2. Credit: ESO/Digitized Sky Survey 2. Acknowledgement: Davide De Martin. Download image

[1] A complex organic molecule is defined in astrochemistry as consisting of six or more atoms, where at least one of the atoms is carbon. Methyl isocyanate contains carbon, hydrogen, nitrogen and oxygen atoms in the chemical configuration CH3NCO. This very toxic substance was the main cause of death following the tragic Bhopal industrial accident in 1984.

[2] The system was previously studied by ALMA in 2012 and found to contain molecules of the simple sugar glycolaldehyde, another ingredient for life.

[3] The team led by Rafael Martn Domnech used new and archive data of the protostar taken across a large range of wavelengths across ALMA’s receiver Bands 3, 4 and 6. Niels Ligterink and his colleagues used data from the ALMA Protostellar Interferometric Line Survey (PILS), which aims to chart the chemical complexity of IRAS 16293 2422 by imaging the full wavelength range covered by ALMA Band 7 on very small scales, equivalent to the size of our Solar System.

[4] The teams carried out spectrographic analysis of the protostar’s light to determine the chemical constituents. within the massive hot molecular cores of Orion KL and Sagittarius B2 North).

[5] Martn Domnech’s team chemically modelled gas grain formation of methyl isocyanate. The observed amount of the molecule could be explained by chemistry on the surface of dust grains in space, followed by chemical reactions in the gas phase. Moreover, Ligterink team demonstrated that the molecule can be formed at extremely cold interstellar temperatures, down to 15 Kelvin ( 258 degrees Celsius), using cryogenic ultra high vacuum experiments in their laboratory in Leiden.

This research was presented in two papers: “First Detection of Methyl Isocyanate (CH3NCO) in a solar type Protostar” by R. Martn Domnech et al. and “The ALMA PILS survey: Detection of CH3NCO toward the low mass protostar IRAS 16293 2422 and laboratory constraints on its formation”, by N. F. W. Ligterink et al. Both papers will appear in the same issue of the Monthly Notices of the Royal Astronomical Society.

One team is composed of: R. Martn Domnech (Centro de Astrobiologa, Spain), V. M. Rivilla (INAF Osservatorio Astrofisico di Arcetri, Italy), I. Jimnez Serra (Queen Mary University of London, UK), D. Qunard (Queen Mary University of London, UK), L. Testi (INAF Osservatorio Astrofisico di Arcetri, Italy; ESO, Garching, Germany; Excellence Cluster “Universe”, Germany) and J. Martn Pintado (Centro de Astrobiologa, Spain).

The other team is composed of: N. F. W. Ligterink (Sackler Laboratory for Astrophysics, Leiden Observatory, the Netherlands), A. Coutens (University College London, UK), V. Kofman (Sackler Laboratory for Astrophysics, The Netherlands), H. S. P. Mller (Universitt zu Kln, Germany), R. T. Garrod (University of Virginia, USA), H. Calcutt (Niels Bohr Institute Natural History Museum, Denmark), S. F. Wampfler (Center for Space and Habitability, Switzerland), J. K. Jrgensen (Niels Bohr Institute Natural History Museum, Denmark), H. Linnartz (Sackler Laboratory for Astrophysics, The Netherlands) and E. F. van Dishoeck (Leiden Observatory, The Netherlands; Max Planck Institut fr Extraterrestrische Physik, Germany). National Science Foundation (NSF) and the National Institutes of Natural Sciences (NINS) of Japan in cooperation with the Republic of Chile. ALMA is funded by ESO on behalf of its Member States, by NSF in cooperation with the National Research Council of Canada (NRC) and the National Science Council of Taiwan (NSC) and by NINS in cooperation with the Academia Sinica (AS) in Taiwan and the Korea Astronomy and Space Science Institute (KASI).

ALMA construction and operations are led by ESO on behalf of its Member States; by the National Radio Astronomy Observatory (NRAO), managed by Associated Universities, Inc. (AUI), on behalf of North America; and by the National Astronomical Observatory of Japan (NAOJ) on behalf of East Asia. The Joint ALMA Observatory (JAO) provides the unified leadership and management of the construction, commissioning and operation of ALMA.
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