Astrochemistry

Publication Abstract

An Acetic Acid Survey Toward High- and Low-Mass Star Forming Regions

Shiao, Y.-S., Looney, L. W., Snyder, L. E., Friedel, D. N., and Remijan, A. J.

We have used the Combined Array for Research in Millimeter-wave Astronomy (CARMA) to conduct a survey of acetic acid (CH3COOH) at 3 mm wavelengths toward the hot core G19.61-0.23 and the two deeply embedded low-mass protostars IRAS 16293-2422 and NGC 1333 IRAS 4. The observed CH3COOH transitions are the 10*,10-9*,9 E and A lines. We have detected (>3 σ level) these two lines in G19.61-0.23. The abundance ratio of CH3COOH to its isomer, methyl formate (HCOOCH3), is comparable to other CH3COOH sources. However, the CH3COOH lines in IRAS 16293-2422 and NGC 1333 IRAS 4 are not detected in our observations. We set upper limits for the column densities for each source. Based on the CH3COOH detection in IRAS 16293-2422 reported by Cazaux et al., we should have detected the two lines. Therefore, we suggest that the CH3COOH detection in IRAS 16293-2422 is still uncertain.

Presented at the 63rd International Symposium on Molecular Spectroscopy, June 2008



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© 2015, D. N. Friedel