RE-EXAMINING HIGH ABUNDANCE SLOAN DIGITAL SKY SURVEY MASS-METALLICITY OUTLIERS: HIGH N/O, EVOLVED WOLF-RAYET GALAXIES?

RE-EXAMINING HIGH ABUNDANCE SLOAN DIGITAL SKY SURVEY MASS-METALLICITY OUTLIERS: HIGH N/O, EVOLVED WOLF-RAYET GALAXIES?

We present new MMT spectroscopic observations of four dwarf galaxies representative of a larger sample observed by the Sloan Digital Sky Survey and identified by Peeples et al. as low-mass, high oxygen abundance outliers from the mass-metallicity relation. Peeples showed that these four objects (wit...

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Veröffentlicht in:The Astrophysical journal 2011-09, Vol.738 (1), p.jQuery1323904055739='48'-jQuery1323904055739='48'
1. Verfasser: Berg, Danielle A
Format: Artikel
Sprache:eng
Schlagworte:
ABUNDANCE
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
ELEMENT ABUNDANCE
ELEMENTS
EMISSION
ENERGY-LEVEL TRANSITIONS
EVOLUTION
EXCITATION
GALACTIC EVOLUTION
GALAXIES
LUMINOSITY
MAIN SEQUENCE STARS
MASS
METALS
NONMETALS
OPTICAL PROPERTIES
OXYGEN
PHYSICAL PROPERTIES
STARS
WOLF-RAYET STARS
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Zusammenfassung:We present new MMT spectroscopic observations of four dwarf galaxies representative of a larger sample observed by the Sloan Digital Sky Survey and identified by Peeples et al. as low-mass, high oxygen abundance outliers from the mass-metallicity relation. Peeples showed that these four objects (with metallicity estimates of 8.5
ISSN:0004-637X
1538-4357
DOI:10.1088/0004-637X/738/1/2