Large-scale molecular shocks in galaxies: the imprint of mechanical dominated regions (MDR)

Details Large-scale molecular shocks in galaxies: the imprint of mechanical dominated regions (MDR) Large-scale molecular shocks in galaxies: the imprint of mechanical dominated regions (MDR)

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..280p.170g&link_type=abstract

The Molecular Universe, Posters from the proceedings of the 280th Symposium of the International Astronomical Union held in Tole

Astronomy and Astrophysics

Astronomy

Scientific paper

The propagation of star formation (SF) and the onset of AGN activity episodes are responsible of the injection of vast amounts of energy in the molecular ISM of galaxies. This feedback loop is governed by strong radiation fields (UV and X rays) and large-scale massive gas flows likely associated to shocks. High-resolution observations that directly probe the dense molecular material fueling SF and AGN activity are key if we are to understand if and how accretion can self-regulate in galaxies. We review the results obtained in a survey conducted with the IRAM array where we used SiO lines to identify and image large-scale molecular shocks in a sample of starburst and active galaxies. Large-scale molecular shocks are identified in the different evolutionary stages of the starburst phenomenon represented by the galaxies NGC253, M82 and IC342. Strong circumnuclear SiO emission has been recently mapped in the Seyfert 2 galaxy NGC1068 and in the merger system Arp220. The relevance of mechanical heating has been recently explored in theoretical models as a viable explanation for the `abnormal' chemistry of molecular gas in starburst and active galaxies. These observations reveal the existence of large-scale Mechanical Dominated Regions (MDRs) in galaxies. We discuss how the imprint of dust grain chemistry can be used to identify the mechanisms regulating the feeding and the feedback of activity in the different galaxy environments studied in this survey.

Affiliated with

Also associated with

No associations

Rating

Large-scale molecular shocks in galaxies: the imprint of mechanical dominated regions (MDR) 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 molecular shocks in galaxies: the imprint of mechanical dominated regions (MDR), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Large-scale molecular shocks in galaxies: the imprint of mechanical dominated regions (MDR) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-929522