Area spectroscopy of the core of 30 Doradus

Details Area spectroscopy of the core of 30 Doradus Area spectroscopy of the core of 30 Doradus

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...173..137c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 173, no. 1, Feb. 1987, p. 137-144.

Astronomy and Astrophysics

Astrophysics

19

Astronomical Spectroscopy, Hydrogen Clouds, High Resolution, Interstellar Matter, Ion Production Rates, Spectral Resolution

Scientific paper

High spectral resolution [O III] line profiles have been obtained over the northern part of the core of 30 Doradus using the telescope control program Aspect. The area coverage has revealed a mean velocity gradient across the whole area observed which is believed to indicate the presence of two ionized sheets of material whose emission line intensities vary spatially. In addition, several ring-like structures are seen which are shown to be more likely due to the chance alignment of several independent ionization fronts than to the presence of interstellar bubbles. The tilts in velocity trends seen by previous observers are also shown to be due to separate ionization fronts and not flows of material.

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