H2 and H I emission line imaging of the ring nebula (NGC 6720)

Details H2 and H I emission line imaging of the ring nebula (NGC 6720) H2 and H I emission line imaging of the ring nebula (NGC 6720)

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988apj...325..604g&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 325, Feb. 15, 1988, p. 604-609. Research supported by the University of Wyo

Astronomy and Astrophysics

Astrophysics

30

Emission Spectra, Infrared Spectra, Molecular Spectra, Nebulae, Stellar Evolution, Angular Distribution, Hydrogen, Interstellar Extinction, Interstellar Matter, Spectrum Analysis

Scientific paper

Infrared emission-line images of the v = 1-0 S(1) transition of molecular hydrogen and Br-gamma recombination line of atomic hydrogen which cover the entire extent of NGC 6720, the Ring nebula. The maps presented here are the highest angular resolution images of these transitions yet produced for this object and have very low relative positional uncertainty. As a result, the spatial stratification of the ionized and shocked molecular zones within the nebula is clearly resolved. These data, and data from the Infrared Astronomical Satellite, are used to determine the H2, H I, and dust mass within the nebula. Energy sources for the dust heating, formation and destruction of the H2, and overall evolution of the nebula are also discussed.

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