Other
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...206.1202l&link_type=abstract
American Astronomical Society Meeting 206, #12.02; Bulletin of the American Astronomical Society, Vol. 37, p.448
Other
Scientific paper
New optical spectra of eight dwarf irregular galaxies in the Centaurus A (Cen A) group were obtained with the EFOSC2 instrument on the 3.6-m telescope at La Silla. The resulting derived nebular abundances are compared with measurements of other star-forming dwarfs in the Local Group, the Sculptor Group, and the field. Comparisons among galaxy samples were constructed with the following diagnostics: optical luminosity versus metallicity, metallicity versus gas fraction, and metallicity versus Karachentsev's tidal index. Although most of the dwarfs in our Cen A sample have significant positive tidal indices, there appears in all diagnostic plots little difference between tidally affected galaxies (positive tidal indices) and relatively unaffected galaxies (negative tidal indices).
H. L. acknowledges partial support from a NASA LTSARP grant NAG 5--9221 and from the University of Minnesota.
Grebel Eva Katharina
Lee Hyunyoung
Zucker Daniel B.
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