A Survey of Acetic Acid toward Hot Molecular Cores

Details A Survey of Acetic Acid toward Hot Molecular Cores A Survey of Acetic Acid toward Hot Molecular Cores

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003apj...590..314r&link_type=abstract

The Astrophysical Journal, Volume 590, Issue 1, pp. 314-332.

Astronomy and Astrophysics

Astronomy

30

Astrochemistry, Ism: Abundances- Ism: Individual (G34.3+0.2), Ism: Individual: Alphanumeric: Iras 16293-2422, Ism: Individual (L1448-C), Ism: Individual (M17-Sw), Ism: Individual: Ngc Number: Ngc 1333 Iras 4, Ism: Individual (Ngc 2024 Fir 5), Ism: Individual (Orion Kl), Ism: Individual (Serpens Smm 1), Ism: Individual: Alphanumeric: W3, Ism: Individual (W49 A), Ism: Molecules

Scientific paper

We have surveyed 12 Galactic hot molecular cores for interstellar acetic acid (CH3COOH). This is the most extensive search for acetic acid to date. We have detected a new source of acetic acid toward the high-mass hot molecular core source G34.3+0.2. Using a temperature range between 70 and 185 K, we find a CH3COOH column density range of (0.77-1.64)×1015 cm-2 toward G34.3+0.2. This gives a relative CH3COOH/HCOOCH3 abundance ratio of ~3.3×10-2, which is comparable to the abundance ratio of (3-6)×10-2 found toward Sgr B2(N-LMH) and W51e2 by Remijan and colleagues. All currently known acetic acid sources are within 7 kpc of the Galactic center. Furthermore, our survey suggests that hot molecular cores that have a mass range between 200 and 2000 Msolar and do not show a distinct differentiation between O and N chemistry may be the best places to search for acetic acid and the structurally similar biologically important molecule glycine.

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