2015A&A...576A...5C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.15CEST11:14:41

2015A&A...576A...5C - Astronomy and Astrophysics, volume 576A, 5-5 (2015/4-1)

Detection of glycolaldehyde toward the solar-type protostar NGC 1333 IRAS2A.

COUTENS A., PERSSON M.V., JORGENSEN J.K., WAMPFLER S.F. and LYKKE J.M.

Abstract (from CDS):

Glycolaldehyde is a key molecule in the formation of biologically relevant molecules such as ribose. We report its detection with the Plateau de Bure interferometer toward the Class 0 young stellar object NGC 1333 IRAS2A, which is only the second solar-type protostar for which this prebiotic molecule is detected. Local thermodynamic equilibrium analyses of glycolaldehyde, ethylene glycol (the reduced alcohol of glycolaldehyde), and methyl formate (the most abundant isomer of glycolaldehyde) were carried out. The relative abundance of ethylene glycol to glycolaldehyde is found to be ∼5 - higher than in the Class 0 source IRAS 16293-2422 (∼1), but similar to the lower limits derived in comets (≥3-6). The different ethylene glycol-to-glycolaldehyde ratios in the two protostars might be related to different CH3OH:CO compositions of the icy grain mantles. In particular, a more efficient hydrogenation on the grains in NGC 1333 IRAS2A would favor the formation of both methanol and ethylene glycol. In conclusion, it is possible that like NGC 1333 IRAS2A, other low-mass protostars show high ethylene glycol-to-glycolaldehyde abundance ratios. The cometary ratios might consequently be inherited from earlier stages of star formation if the young Sun experienced conditions similar to NGC 1333 IRAS2A.

Abstract Copyright:

Journal keyword(s): astrochemistry - astrobiology - ISM: individual objects: NGC 1333 IRAS2A - stars: formation - stars: protostars - ISM: molecules

Simbad objects: 10

goto Full paper

goto View the reference in ADS

Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 [JCC87] IRAS 2A Y*O 03 28 55.55 +31 14 36.7           ~ 390 3
2 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1220 1
3 IRAS 16293-2422 cor 16 32 22.56 -24 28 31.8           ~ 1035 1
4 GCM -0.11 -0.08 MoC 17 45 39 -29 04.1           ~ 14 0
5 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11546 0
6 GCM -0.02 -0.07 MoC 17 45 50.4 -28 59 06           ~ 140 0
7 NAME Sgr B2 (North) Rad 17 47 20.2 -28 22 21           ~ 514 1
8 GCM +0.693 -0.027 MoC 17 47 21.9 -28 21 27           ~ 15 0
9 IRAS 18449-0115 cor 18 47 34.4947 -01 12 40.269           ~ 312 0
10 NAME NGC 7129 FIR 2 IR 21 44 01.5 +66 03 40           ~ 84 0

    Equat.    Gal    SGal    Ecl

To bookmark this query, right click on this link: simbad:objects in 2015A&A...576A...5C and select 'bookmark this link' or equivalent in the popup menu


2020.07.15-11:14:41

© Université de Strasbourg/CNRS

    • Contact