Other
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..354p&link_type=abstract
Astrophysical Journal, Part 1, vol. 231, July 15, 1979, p. 354-363.
Other
34
Astronomical Photography, Early Stars, Galactic Nuclei, Galactic Structure, Stellar Evolution, Charge Coupled Devices, Hydrogen Clouds, Neutral Gases, Radiation Detectors, Spatial Distribution, Star Formation Rate
Scientific paper
Two-color (broadband B and R) imagery of the nucleus and bulge of the S0 galaxy NGC 5102 has been obtained by employing a two-dimensional CCD detector. The observations are used to investigate how the structural parameters of NGC 5102 compare with those of old gas-free galaxies, the spatial distribution of young stars in NGC 5102, and how the star-formation rate in NGC 5102 has changed in the recent past. Reasons for the large differences in star-formation rate and gas content observed among galaxies with similar morphology are also considered. It is found that there is a compact bright nucleus at the center of NGC 5102, that the blue colors of this nucleus are consistent with a burst of star formation that took place about 100 million yr ago, and that some recent star formation appears to have occured throughout the bulge of NGC 5102. Taken with the known existence of other S0 galaxies with blue colors and neutral hydrogen, the results suggest that the presence of a young stellar component is not uncommon in early-type galaxies.
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