Line excess objects: A new infrared spectroscopic class

Astronomy and Astrophysics – Astronomy

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

1

Infrared Spectroscopy, Line Spectra, Near Infrared Radiation, Stellar Evolution, Stellar Spectra, Emission Spectra, H Ii Regions, Hydrogen, Ionization, Molecular Clouds, Radio Emission, Radio Sources (Astronomy), Stellar Luminosity, Stellar Winds

Scientific paper

Near infrared spectroscopic studies of obscured objects in star formation regions yielded a new class of object. The new class is defined by an excess of emission in the Brackett lines of hydrogen over that expected from an H II region around a ZAMS star of the same luminosity. Very low or undetectable radio flux also characterizes the class. Other characteristics include broad lines and in some cases bipolar mass flows and distributions. Several theories were formulated to account for the properties of the class. The theories include stellar winds, viscous disks and deviations from case B recombination. The most likely theory which postulates ionization from the n = 2 level of hydrogen. Line excess objects are probably a major contributor to the supporting kinetic energy of molecular clouds.

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

Line excess objects: A new infrared spectroscopic class 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 Line excess objects: A new infrared spectroscopic class, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line excess objects: A new infrared spectroscopic class will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1029915

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