Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.239..297w&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 239, July 15, 1989, p. 297-324. Research supported by N
Astronomy and Astrophysics
Astronomy
88
Abundance, Astronomical Maps, Astronomical Spectroscopy, Elliptical Galaxies, Starburst Galaxies, Continuous Spectra, Emission Spectra, Forbidden Transitions, Line Spectra, Spectral Resolution, Spectrum Analysis
Scientific paper
Low-spectral-resolution spectroscopy has been used to map the emission line and continuum variations of NGC 5253 at a high SNR. Point-to-point fluctuations in extinction and line ratios greater than the errors have been measured. An enrichment of nitrogen in the central region (by a factor of 1.8 with respect to the mean N abundance of the surrounding) is associated with a broad 4686-A feature, indicating the presence of WR stars. He(+)/H is shown to correlate better with N/O than with N/H for pixels in the central region with enhanced N/H abundance. A high carbon abundance with a C/O abundance ratio of about 0.10 is noted, suggesting that WC stars may also be present in the starburst.
ROY Jean-Rene
Walsh Jonathan R.
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