AAS Meeting #193 - Austin, Texas, January 1999
Session 3. Galaxy Evolution and Surveys II - High Redshift
Display, Wednesday, January 6, 1999, 9:20am-6:30pm, Exhibit Hall 1
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[3.07] Chemical Properties of Star-Forming Emission Line Galaxies at z=0.1 - 0.5
C. Kobulnicky, D. Zaritsky (UC Santa Cruz)
We measure oxygen and nitrogen abundances for 14
star-forming emission line galaxies (ELGs) at 0.11 -1.4 like local spirals. These chemical
properties are inconsistent with unevolved objects
undergoing a first burst of star formation. The majority of
the ELGs are presently ~4 magnitudes brighter and
~0.5 dex more metal-rich than the bulk of the stars in
well-known metal-poor dwarf spheroidals such as NGC~205 and
NGC~185, making an evolution between some ELGs and
metal-poor dwarf spheroidals improbable. However, the data
are consistent with the hypothesis that more luminous and
metal-rich spheroidal galaxies like NGC~3605 may become the
evolutionary endpoints of some ELGs.
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