Chemical Properties of Star‐forming Emission‐Line Galaxies atz=0.1–0.5 | Zendy

Henry A. Kobulnicky | Zendy; Dennis Zaritsky | Zendy

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Chemical Properties of Star‐forming Emission‐Line Galaxies atz=0.1–0.5

Author(s) -

Henry A. Kobulnicky,

Dennis Zaritsky

Publication year - 1999

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/306673

Subject(s) - physics , astrophysics , galaxy , luminosity , metallicity , astronomy , luminous infrared galaxy , star formation , irregular galaxy , doubly ionized oxygen , elliptical galaxy , line (geometry) , emission spectrum , spectral line , lenticular galaxy , geometry , mathematics

We measure oxygen and nitrogen abundances for 14 star-forming emission linegalaxies (ELGs) at 0.11 -1.4 like local spirals. These chemical properties areinconsistent with unevolved objects undergoing a first burst of star formation.The majority of the ELGs are presently ~4 magnitudes brighter and ~0.5 dex moremetal-rich than the bulk of the stars in well-known metal-poor dwarfspheroidals such as NGC 205 and NGC 185, making an evolution between some ELGsand metal-poor dwarf spheroidals improbable. However, the data are consistentwith the hypothesis that more luminous and metal-rich spheroidal galaxies likeNGC 3605 may become the evolutionary endpoints of some ELGs. [abridged]Comment: 41 pages, w/12 figures, uses AASTeX aaspp4.sty, psfig.sty; To appear in The Astrophysical Journa

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