Chemical evolution ahead of Herbig-Haro objects

Details Chemical evolution ahead of Herbig-Haro objects Chemical evolution ahead of Herbig-Haro objects

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.310..517v&link_type=abstract

Monthly Notices, Volume 310, Issue 2, pp. 517-526.

Astronomy and Astrophysics

Astronomy

39

Molecular Processes, Ism: Clouds, Ism: Jets And Outflows, Ism: Molecules

Scientific paper

Compact regions of enhanced HCO+ and NH3 emission have been detected close to a number of Herbig-Haro objects. An interpretation of these detections is the following: a transient clump within the molecular cloud has been irradiated by the shock that generates the Herbig-Haro object. The irradiation releases icy mantles from the grains within the transient clump and initiates a photochemistry. On the basis of this picture, we have developed an extensive chemical model which predicts that a wide range of species, other than NH3 and HCO+, should also be detectable. These include CH3OH, H2S, C3H4, H2CO, SO, SO2, H2CS and NS. The chemical effects should last ~104yr.

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