ALMA Detection of Interstellar Methoxymethanol (CH3OCH2OH)

  title={ALMA Detection of Interstellar Methoxymethanol (CH3OCH2OH)},
  author={Brett A. McGuire and Christopher N. Shingledecker and Eric R. Willis and Andrew M. Burkhardt and Samer J. El-Abd and Roman A. Motiyenko and Crystal L. Brogan and Todd R. Hunter and Laurent Margul{\`e}s and J. C. Guillemin and Robin T. Garrod and Eric Herbst and Anthony J. Remijan},
  journal={The Astrophysical Journal Letters},
We report the detection of interstellar methoxymethanol (CH3OCH2OH) in Atacama Large Millimeter/submillimeter Array (ALMA) Bands 6 and 7 toward the MM1 core in the high-mass star-forming region NGC 6334I at ∼0.″1–1″ spatial resolution. A column density of 4(2) × 1018 cm−2 at Tex = 200 K is derived toward MM1, ∼34 times less abundant than methanol (CH3OH), and significantly higher than predicted by astrochemical models. Probable formation and destruction pathways are discussed, primarily through… 

Detection of methoxymethanol as a photochemistry product of condensed methanol

We report the identification of methoxymethanol (CH3OCH2OH) as a photochemistry product of condensed methanol (CH3OH) based on temperature-programmed desorption studies conducted following photon

Untangling the Formation of Methoxymethanol (CH3OCH2OH) and Dimethyl Peroxide (CH3OOCH3) in Star-forming Regions

Methoxymethanol (CH3OCH2OH) was recently detected toward the MM1 core in the high-mass star-forming region NGC 6334I. However, the underlying formation mechanisms of this complex organic molecule

Searches for Interstellar HCCSH and H2CCS

A longstanding problem in astrochemistry is the inability of many current models to account for missing sulfur content. Many relatively simple species that may be good candidates to sequester sulfur

ALMA Detection of Vibrationally Excited (v t = 1, 2) Acetic Acid toward NGC 6334I

Vibrationally excited states of detected interstellar molecules have been shown to account for a large portion of unidentified spectral lines in observed interstellar spectra toward chemically rich

ALMA Observations of the Spatial Distribution of Three C2H4O2 Isomers toward Sgr B2(N)

The isomers have been previously investigated primarily via disparate sets of observations involving single-dish and array measurements. The only attempt at using a uniform set of observations was

Formation of formaldehyde through methanol-ice-mantle (CH3OH)10 bombardment by OH+ cation

Context. Formaldehyde H2CO was the first organic polyatomic molecule discovered in the interstellar medium to have been detected in a variety of sources. However, pathways to synthesize this molecule

Millimeter wave spectroscopy of cyanoketene (NC–CH=C=O) and an observational search in the ISM

Context. Ketene was detected in the interstellar medium (ISM) in 1977. Until now, only one derivative, the ketenyl radical, has been observed in this medium. Due to its large dipole moment value,

On the Production of Polyols and Hydroxycarboxylic Acids in Interstellar Analogous Ices of Methanol

This laboratory work studied the production of complex organic molecules in pure methanol (CH3OH) ices exposed to ionizing radiation in the form of energetic electrons. The chemical evolution of the

Submillimeter-wave spectroscopy and the radio-astronomical investigation of propynethial (HC≡CCHS)

Context. The majority of sulfur-containing molecules detected in the interstellar medium (ISM) are analogs of oxygen-containing compounds. Propynal was detected in the ISM in 1988, hence

The Laboratory Millimeter and Submillimeter Rotational Spectrum of Lactaldehyde and an Astronomical Search in Sgr B2(N), Orion-KL, and NGC 6334I

We present a laboratory rotational study of, and astronomical search for, lactaldehyde (CH3CH(OH)CH(O)), one of the simplest chiral molecules that could reasonably be seen in the interstellar medium




We report on the discovery of the methoxy radical (CH3O) toward the cold and dense core B1-b based on the observation, with the IRAM 30 m radio telescope, of several lines at 3 and 2 mm wavelengths.

Green Bank Telescope Observations of Interstellar Glycolaldehyde: Low-Temperature Sugar

Interstellar glycolaldehyde (CH2OHCHO) has been detected with the 100 m Green Bank Telescope (GBT) toward the star-forming region Sagittarius B2(N) by means of the 110-101, 211-202, 312-303, and


The rotational spectrum of the higher-energy trans-conformational isomer of methyl formate has been assigned for the first time using several pulsed-jet Fourier transform microwave spectrometers in

Rotational spectroscopy, tentative interstellar detection, and chemical modeling of N-methylformamide

Context. N-methylformamide, CH3 NHCHO, may be an important molecule for interstellar pre-biotic chemistry because it contains a peptide bond, which in terrestrial chemistry is responsible for linking

Simultaneous hydrogenation and UV-photolysis experiments of NO in CO-rich interstellar ice analogues; linking HNCO, OCN−, NH2CHO, and NH2OH

The laboratory work presented here, simulates the chemistry on icy dust grains as typical for the 'CO freeze-out stage' in dark molecular clouds. It differs from previous studies in that solid-state

Hydrogenation reactions in interstellar CO ice analogues A combined experimental/theoretical approach

Context. Hydrogenation reactions of CO in inter- and circumstellar ices are regarded as an important starting point in the formation of more complex species. Previous laboratory measurements by two

Multipass millimeter/submillimeter spectrometer to probe dissociative reaction dynamics.

The instrument design and first experimental results from a multipass millimeter/submillimeter spectrometer designed to probe dissociative reaction dynamics are presented and the minimum detectable absorption coefficient is determined to be αmin ≤ 5 × 10(-9) cm(-1).

Methanol Formation via Oxygen Insertion Chemistry in Ices

We present experimental constraints on the insertion of oxygen atoms into methane to form methanol in astrophysical ice analogs. In gas-phase and theoretical studies this process has previously been

Low-energy electron-induced chemistry of condensed methanol: implications for the interstellar synthesis of prebiotic molecules.

In the interstellar medium, UV photolysis of condensed methanol (CH3OH), contained in ice mantles surrounding dust grains, is thought to be the mechanism that drives the formation of "complex"

The ALMA Protostellar Interferometric Line Survey (PILS)

The inner regions of the envelopes surrounding young protostars are characterised by a complex chemistry, with prebiotic molecules present on the scales where protoplanetary disks eventually may