Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.236..409b&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 236, Jan. 15, 1989, p. 409-423.
Astronomy and Astrophysics
Astronomy
57
Astronomical Spectroscopy, Emission Spectra, Hydrogen, Molecular Excitation, Shock Waves, Herbig-Haro Objects, Interstellar Gas, Molecular Collisions, Planetary Nebulae, Star Formation, Supernova Remnants
Scientific paper
Five emission lines of molecular hydrogen, with wavelengths in the ranges of 2.10-2.25 and 3.80-3.85 microns, have been observed in four objects of different type in which the line emission is believed to be excited by shocks. The relative intensities of the lines 1 - 0 S(1):1 - 0 S(O):2 - 1 S(1) are approximately 10.5:2.5:1.0 in all four objects. The 0 - 0 S(13):1 - 0 O(7) line ratio, however, varies from 1.05 in OMC-1 to about 2.3 in the Herbig-Haro object HH 7. The excitation temperature derived from the S(13) and O(7) lines is higher than that derived from the 1 - 0 and 2 - 1 S(1) lines in all four objects, so the shocked gas in these objects cannot be characterized by a single temperature. The constancy of the (1-0)/(2-1) S(1) line ratio between sources suggests that the post-shock gas is 'thermalized' in each source. The S(13)/O(7) ratio is particularly sensitive to the density and temperature conditions in the gas.
Brand Peter W. J. L.
Burton Michael G.
Geballe Thomas Ronald
Webster Adrian S.
No associations
LandOfFree
Molecular hydrogen line ratios in four regions of shock-excited gas 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 Molecular hydrogen line ratios in four regions of shock-excited gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Molecular hydrogen line ratios in four regions of shock-excited gas will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-828058