IRAS 16293-2422

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IRAS 16293-2422 are two young double stars in the constellation Snake Bearer . The stars lie in the Rho Ophiuchi cloud , which is considered to be the star formation region, and are about 400 light years away from Earth . IRAS 16293-2422 was discovered by the IRAS telescope in 1983 in the infrared bands 25, 60 and 100 micrometers. In 1989 and 1992 research showed that it is a binary star with 1629a and a mass of 0.6 solar mass and 1629b with a mass of 0.9 solar mass. The distance between the two stars is about 800 astronomical units . The system is surrounded by gas and dust, which consists of propionitrile , methyl formate , formic acid and silicon monoxide . With the help of silicon monoxide, it was found that there are two disks rotating in opposite directions. In 2012, it was found that the discs also contain glycolaldehyde , the first substance discovered in such a young system that can be assigned to sugars . In 2017, the ALMA microwave observatory found the organic molecule methyl isocyanate around the very young, sun-like stars . This molecule plays a role in the synthesis of peptides and amino acids and thus represents a chemical building block for the development of life. It is the first discovery of the prebiotic molecule in such a system, which has similar conditions to our solar system about 4, 5 billion years ago. It was discovered in the warm, dense interior areas of the dust and gas cocoons.

Web links

Commons : IRAS 16293-2422  - Collection of Images, Videos and Audio Files

Individual evidence

  1. ↑ Walker, CK, Lada, CJ, Young, ET, Maloney, PR, & Wilking, BA: Spectroscopic evidence for infall around an extraordinary IRAS source in Ophiuchus . In: Astrophysical Journal, Part 2 - Letters to the Editor, vol. 309 . October 1, 1986, bibcode : 1986ApJ ... 309L..47W (English).
  2. ^ C. Ceccarelli, E. Caux, GJ White, S. Molinari, I. Furniss, R. Liseau, B. Nisini, P. Saraceno, L. Spinoglio, M. Wolfre: The far infrared line spectrum of the protostar IRAS 16293 -2422. (PDF) 1998, accessed on May 8, 2017 (English).
  3. ↑ Anthony J. Remijan, JM Hollis: IRAS 16293-2422: Evidence for Infall onto a Counterrotating Protostellar Accretion Disk. In: The Astrophysical Journal. April 2006, accessed September 6, 2012 .
  4. ↑ Sweet discovery: Sugar under the stars. ALMA finds building blocks for life with a young star. In: eso.org. European Southern Observatory, August 29, 2012, accessed September 6, 2012 .
  5. ↑ Peter Friedrich, Susanne Friedrich, Johannes Hölzl: Organic molecules around young stars in: Regiomontanusbote, magazine of the Nuremberg Astronomical Working Community. V. 3/2017, page 24, quoted from the source: ESO press release 1718