SIMBAD references

2006ApJ...643L..29A - Astrophys. J., 643, L29-L32 (2006/May-3)

Investigating the limits of chemical complexity in Sagittarius B2(N): a rigorous attempt to confirm 1,3-Dihydroxyacetone.

APPONI A.J., HALFEN D.T., ZIURYS L.M., HOLLIS J.M., REMIJAN A.J. and LOVAS F.J.

Abstract (from CDS):

A search for confirming transitions of 1,3-dihydroxyacetone, (CH2OH)2CO (hereafter DHA), has been made toward Sgr B2(N) using the Arizona Radio Observatory Submillimeter Telescope (SMT) and 12 m telescope at millimeter wavelengths. In addition, data for this species have been obtained at the Green Bank Telescope. In all, 63 new transitions of DHA were sought; no plausible emission was detected at 97% of these frequencies. Typical peak-to-peak limits of 10-30 mK were achieved, indicating that DHA is not present in Sgr B2(N) at the level reported by Widicus Weaver & Blake in 2005, by at least a factor of 300. The upper limit to the DHA column density is Ntot<5x1013/cm2, suggesting that this species, a three-carbon keto sugar, is less abundant than the two-carbon aldehyde sugar, glycolaldehyde (CH2OHCHO), by a factor of at least 4. If sugars of higher complexity are formed in interstellar clouds, their synthesis may proceed one carbon atom at a time, possibly through aldehyde intermediates.

Abstract Copyright:

Journal keyword(s): Astrobiology - Astrochemistry - ISM: Abundances - ISM: Individual: Name: Sagittarius B2 - ISM: Molecules

Simbad objects: 2

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2020.01.27-13:04:09

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