Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aj....103...60m&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 103, Jan. 1992, p. 60-80.
Astronomy and Astrophysics
Astronomy
172
Astronomical Photometry, Astronomical Spectroscopy, Compact Galaxies, Dwarf Galaxies, Galactic Mass, Mass Transfer, Astronomical Catalogs, Emission Spectra, Ionized Gases, Iue, Star Distribution, Star Formation
Scientific paper
Results are presented from a detailed multiwaveband study of the NGC 1705 galaxy, using data on optical spectroscopy, photoelectric aperture photometry, narrow-band and broad-band images, low-dispersion IUE spectra, and 21-cm H I spectra reported in the literature and data from the IRAS Point Source Catalog. It is shown that NGC 1705 is a 'nucleated' blue compact dwarf galaxy containing two stellar populations which are clearly delineated in structure and color. The inner high surface-brightness core population is the location of current cluster and high-mass star formation. The halo has an exponential distribution of light, which is suspected to be also a star forming population. The color difference between the two stellar populations is considered to be due to an age effect or to a difference in the initial mass function in populations.
Cacciari Carla
Dopita Michael A.
Freeman Ken C.
Meurer Gerhardt R.
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