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- Title
EXPLORING MOLECULAR COMPLEXITY WITH ALMA: DEUTERATED COMPLEX ORGANIC MOLECULES IN SGR B2.
- Authors
Belloche, A.; Müller, H. S. P.; Garrod, R. T.; Menten, K. M.
- Abstract
Apart from the case of methanol, little is known about deuterium fractionation of complex organic molecules in the interstellar medium, especially in high mass star forming regions. We take advantage of the EMoCA spectral line survey to search for deuterated complex organic molecules toward the hot molecular core Sgr B2(N2). We report the secure detection of CH2DCN with a deuteration level of 0.4% and tentative detections of CH2DOH, CH2DCH2CN, CH3CHDCN, and DC3N with levels in the range 0.05-0.12%. Except for methyl cyanide, the measured deuteration levels lie at least a factor of four below the predictions of current astrochemical models. They are also lower than in Orion KL by a factor of a few up to a factor ten. These discrepancies and differences may be due to the higher temperatures that prevail in the Galactic Center region compared to nearby clouds, or they may result from a lower overall abundance of deuterium itself in the Galactic Center region by up to a factor ten.
- Subjects
INTERSTELLAR molecules; ATACAMA Large Millimeter Array (Project); DEUTERATION; STAR formation; GALACTIC center; SAGITTARIUS (Constellation)
- Publication
EAS Publications Series, 2015, Vol 75/76, p329
- ISSN
1633-4760
- Publication type
Article
- DOI
10.1051/eas/1575066