NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-21 T14:08:37 PDT
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For refcode 2014ApJ...783...20W:
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2014ApJ...783...20W Individual Alpha Elements, C, N, and Ba in Early-type Galaxies Worthey, Guy; Tang, Baitian; Serven, Jedidiah Abstract. Spectral data on early-type galaxies are analyzed for chemical abundance with an emphasis on obtaining detailed abundances for the elements O and Si in addition to C, N, Na, Mg, Ca, Fe, and Ba. The abundance trends with velocity dispersion fit preconceptions based upon previous Mg conclusions, namely, that larger galaxies have a higher {alpha} element to iron peak ratio indicative of a higher ratio of Type II to Type Ia supernova products. The heaviest {alpha} elements, Ca and Ti, do not participate in this trend, although this fact does not necessarily alter the basic picture given the uncertainties in nucleosynthetic yields. Elements that likely have significant contributions from intermediate-mass stars, namely, C, N, and Ba, also gain ground relative to Fe in massive galaxies at a modest level, with the Ba conclusion uncertain from our data alone. After the velocity dispersion trend is subtracted, [M/H], [N/Fe], [Na/Fe], [Mg/Fe], and [Ca/Fe] probably have cosmic scatter, and no quantity can be shown to not have cosmic scatter. Key words: galaxies: abundances, galaxies: stellar content, Galaxy: abundances, Galaxy: stellar content, stars: abundances
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