The dynamics of a giant filamentary shell in the LMC. II

Details The dynamics of a giant filamentary shell in the LMC. II The dynamics of a giant filamentary shell in the LMC. II

Jul 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980mnras.192..101b&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 192, July 1980, p. 101-108.

Astronomy and Astrophysics

Astronomy

30

Astronomical Spectroscopy, Circular Shells, Forbidden Bands, Interstellar Matter, Magellanic Clouds, Absorption Spectra, Oxygen Ions, Radial Velocity

Scientific paper

Profiles of the O II forbidden emission lines have been obtained at many positions over the giant circular filamentary shell, N70, in the LMC, at a significantly higher angular resolution than achieved by Lasker (1977). In addition, a profile of the Ca II (K) interstellar absorption line was observed for the brightest star in the central cluster. The motions in N70 are found to be much more complicated than those expected of a single, expanding, spherical shell of either supernova or stellar wind origin. Complex motions over a range of heliocentric radial velocities from 238 to 343 km/s have been discovered which could be explained by separate expanding shells in both of the large clouds of neutral hydrogen (McGee and Milton, 1966) in this vicinity.

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