Ionization front interactions and the formation of globules

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

8

Gas Ionization, Globules, Molecular Clouds, Wave Fronts, Astrophysics, Elastic Waves, H Ii Regions, Hydrogen Atoms, Taylor Instability, Wave Propagation

Scientific paper

It is assumed that an H II region has evolved inside a molecular cloud. The interactions that result from the expanding shell of compressed molecular gas reaching the edge of the cloud are calculated, and the instability of the ionization front to the formation of globules is investigated. The rarefaction wave which is reflected from the contact discontinuity as the leading shock passes through the edge of the cloud accelerates the ionization front, and since conditions at the front satisfy Capriotti's criterion for instability, the shell breaks up. The size of the fragment so created is determined by the thickness of the compressed shell. If the shell phase of H II region evolution has proceeded significantly, then globules of up to a fraction of a solar mass may be formed in an H II region caused by a star with an ionizing luminosity of 10 to the 49th photons/sec in a molecular cloud of density 1000/cu cm. These globules may survive the ionizing flux from the star, and will be driven from the cloud by the rocket effect.

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

Ionization front interactions and the formation of globules 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 Ionization front interactions and the formation of globules, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ionization front interactions and the formation of globules will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1469996

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