Wednesday, September 21, 2022

Herbig-Haro Objects in the Pelican Nebula

 Adjacent to the North America Nebula, the Pelican Nebula (IC 5070 and 5067) is a region of active star formation. Of particular interest are several Herbig-Haro objects, which are bright patches of nebulosity associated with newborn stars. Herbig-Haro objects are formed when narrow jets of partially-ionized gas collide with adjacent clouds of gas and dust at speeds of several hundred kilometers an hour.

Images if the Pelican showing these objects typically take more than 10 hours of integration time. I was surprised to see them emerge clearly in the 90-minute total exposure I captured last evening.

The images below are all crops of the Nebula captured with the RASA 8 and DS10C camera.

The images below show: the full scale image of the Pelican and environs; a crop of that image showing more detail of the nebula, and a monochrome image with the Herbig-Haro objects labeled. HH 555 is the most prominent and, if you look closely, you can see the jet shooting out of each side of the tip.





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