Coupling the dynamics and the molecular chemistry in the Galactic center

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

One figure as an independent PDF file. Accepted by A&A

Scientific paper

10.1051/0004-6361:20064813

The physical conditions of the Galactic center (GC) clouds moving with non-circular velocities are not well-known. We have studied the physical conditions of these clouds with the aim of better understanding the origin of the outstanding physical conditions of the GC molecular gas and the possible effect of the large scale dynamics on these physical conditions.Using published CO(1-0) data, we have selected a set of clouds belonging to all the kinematical components seen in the longitude-velocity diagram of the GC. We have done a survey of dense gas in all the components using the J=2-1 lines of CS and SiO as tracers of high density gas and shock chemistry. We have detected CS and SiO emission in all the kinematical components. The gas density and the SiO abundance of the clouds in non-circular orbits are similar those in the nuclear ring (GCR). Therefore, in all the kinematical components there are dense clouds that can withstand the tidal shear. However, there is no evidence of star formation outside the GCR. The high relative velocity and shear expected in the dust-lanes along the bar major axis could inhibit the star formation process, as observed in other galaxies. The high SiO abundances derived in the non-circular velocity clouds are likely due to the large-scale shocks that created the dust lanes

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Coupling the dynamics and the molecular chemistry 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 Coupling the dynamics and the molecular chemistry in the Galactic center, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coupling the dynamics and the molecular chemistry in the Galactic center will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-331981

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.