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J/ApJ/695/259       Massive metal-poor galaxies from SDSS       (Peeples+, 2009)

Outliers from the mass-metallicity relation. II. A sample of massive metal-poor galaxies from SDSS. Peeples M.S., Pogge R.W., Stanek K.Z. <Astrophys. J., 695, 259-267 (2009)> =2009ApJ...695..259P
ADC_Keywords: Galaxies, optical ; Redshifts ; Abundances Keywords: galaxies: abundances - galaxies: evolution Abstract: We present a sample of 42 high-mass low-metallicity outliers from the mass-metallicity relation of star-forming galaxies. These galaxies have stellar masses that span log(M*/M)∼9.4 to 11.1 and are offset from the mass-metallicity relation by -0.3 to -0.85dex in 12+log(O/H). In general, they are extremely blue, have high star-formation rates for their masses, and are morphologically disturbed. Tidal interactions are expected to induce large-scale gas inflow to the galaxies' central regions, and we find that these galaxies' gas-phase oxygen abundances are consistent with large quantities of low-metallicity gas from large galactocentric radii diluting the central metal-rich gas. We conclude with implications for deducing gas-phase metallicities of individual galaxies based solely on their luminosities, specifically in the case of long gamma-ray burst host galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 37 42 Low-metallicity mass-metallicity outliers
See also: II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) J/ApJ/685/904 : Metal-rich dwarf galaxies from SDSS-DR4 (Peeples+, 2008) J/A+A/459/85 : O/H and gas densities in star-forming galaxies (Nagao+, 2006) J/A+A/448/955 : Abundances of emission galaxies in SDSS-DR3 (Izotov+, 2006) http://www.sdss.org/ : SDSS home page Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 F8.4 deg RAdeg Right ascension in decimal degrees (J2000) 10- 17 F8.5 deg DEdeg Declination in decimal degrees (J2000) 19- 22 F4.2 [-] eps(O) Oxygen abundance (12+log(O/H)) from Tremonti et al. 2004ApJ...613..898T 24- 28 F5.2 [-] logM* Stellar mass from Tremonti et al. 2004ApJ...613..898T (1) 30- 35 F6.4 --- z Redshift 37 A1 --- Note [s] "s" for spiral galaxy
Note (1): Sample of massive low-metallicity galaxies, reverse sorted by stellar mass.
Nomenclature notes: Galaxies are <[PPS2009] DDD.dddd+DD.ddddd> in Simbad. History: From electronic version of the journal References: Peeples et al. Paper I. 2008ApJ...685..904P Cat. J/ApJ/685/904
(End) Emmanuelle Perret [CDS] 04-Apr-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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