Herbig-Haro Objects: A Side View of Protoplanetary Disks

Herbig-Haro Objects: A Side View of Protoplanetary Disks

Herbig-Haro Objects

Protoplanetary Disc

Herbig-Haro (HH) objects are bright, nebulous regions of gas and dust that are associated with young stars. They are found in star-forming regions, and they are the result of jets of material that are ejected from these stars. These jets can travel at speeds of hundreds of kilometers per second. 

Protoplanetary disks are rotating disks of gas and dust that surround young stars. They are the sites where planets form. The material in the disk is gradually accreted onto the star, and it can also be ejected from the disk in the form of jets.

HH objects are formed when material is ejected from the protoplanetary disk itself. This material can be ejected in the form of jets, or it can be ejected in a more diffuse manner. In either case, the ejected material can collide with the surrounding interstellar medium, creating shock waves and HH objects.

HH objects can provide us with a unique view of protoplanetary disks. Because HH objects are formed by jets that are ejected from the disk, they can give us a glimpse into the inner regions of the disk. This is important because the inner regions of the disk are where planets are thought to form.

In addition, HH objects can give us a sense of the three-dimensional structure of the disk. This is because HH objects are often found to be aligned with the rotation axis of the disk. By studying the morphology of HH objects, we can learn about the shape and orientation of the disk.


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