Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-11-28
Astronomy and Astrophysics
Astrophysics
In press in Astrophysical Journal Letters 7 pages, 1 table, 1 figure
Scientific paper
10.1086/318937
We present observations of C2H5OH toward molecular clouds in Sgr A, Sgr B2 and associated with thermal and non-thermal features in the Galactic center. C2H5OH emission in Sgr A and Sgr B2 is widespread, but not uniform. C2H5OH emission is much weaker or it is not detected in some molecular clouds in both complexes, in particular those with radial velocities between 70 and 120 km/s. While most of the clouds associated with the thermal features do not show C2H5OH emission, that associated with the Non-Thermal Radio Arc shows emission. The fractional abundance of C2H5OH in most of the clouds with radial velocities between 0 and 70 km/s in Sgr A and Sgr B2 is relatively high, of few 1e-8. The C2H5OH abundance decreases by more than one order of magnitude (aprox. 1e-9) in the clouds associated with the thermal features. The large abundance of C2H5OH in the gas-phase indicates that C2H5OH has formed in grains and released to gas-phase by shocks in the last aprox. 1e5 years.
de Vicente P.
Fuente Asuncion
Martín-Pintado Jesús
Rizzo Ricardo J.
Rodriguez-Fernandez Nemesio J.
No associations
LandOfFree
Large scale grain mantle disruption in the Galactic Center does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Large scale grain mantle disruption in the Galactic Center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large scale grain mantle disruption in the Galactic Center will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-115384