Investigating the limits of chemical complexity in sagittarius B2(N): A rigorous attempt to confirm 1,3-dihydroxyacetone

A. J. Apponi, D. T. Halfen, Lucy M Ziurys, J. M. Hollis, Anthony J. Remijan, F. J. Lovas

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A search for confirming transitions of 1,3-dihydroxyacetone, (CH 2OH)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 < 5 × 1013 cm-2, 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.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume643
Issue number1 II
DOIs
StatePublished - May 29 2006

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sugars
sugar
telescopes
aldehyde
aldehydes
carbon
observatories
observatory
methylidyne
radio
wavelength
synthesis
wavelengths
atoms
chemical

Keywords

  • Astrobiology
  • Astrochemistry
  • ISM: abundances
  • ISM: individual (Sagittarius B2)
  • ISM: molecules

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

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, Lucy M; Hollis, J. M.; Remijan, Anthony J.; Lovas, F. J.

In: Astrophysical Journal, Vol. 643, No. 1 II, 29.05.2006.

Research output: Contribution to journalArticle

Apponi, A. J. ; Halfen, D. T. ; Ziurys, Lucy M ; Hollis, J. M. ; Remijan, Anthony J. ; Lovas, F. J. / Investigating the limits of chemical complexity in sagittarius B2(N) : A rigorous attempt to confirm 1,3-dihydroxyacetone. In: Astrophysical Journal. 2006 ; Vol. 643, No. 1 II.
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