First detection of glycolaldehyde outside the Galactic Center - AstrophysicsReportar como inadecuado

First detection of glycolaldehyde outside the Galactic Center - Astrophysics - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: Glycolaldehyde is the simplest of the monosaccharide sugars and is directlylinked to the origin of life. We report on the detection of glycolaldehydeCH2OHCHO towards the hot molecular core G31.41+0.31 through IRAM PdBIobservations at 1.4, 2.1, and 2.9 mm. The CH2OHCHO emission comes from thehottest > 300 K and densest >2E8 cm^-3 region closest < 10^4 AU to theprotostars. The comparison of data with gas-grain chemical models of hotcores suggests for G31.41+0.31 an age of a few 10^5 yr. We also show that onlysmall amounts of CO need to be processed on grains in order for existing hotcore gas-grain chemical models to reproduce the observed column densities ofglycolaldehyde, making surface reactions the most feasible route to itsformation.

Autor: M.T. Beltran 1, C. Codella 2, S. Viti 3, R. Neri 4, R. Cesaroni 5 1 Universitat de Barcelona-CSIC 2 INAF-Istituto di Radioastrono


Documentos relacionados