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J/ApJ/847/18     Mass, Z, dust attenuation, and SFR relations     (Zahid+, 2017)

Stellar absorption line analysis of local star-forming galaxies: the relation between stellar mass, metallicity, dust attenuation, and star formation rate. Zahid J. H., Kudritzki R.-P., Conroy C., Andrews B., Ho I.-T. <Astrophys. J., 847, 18 (2017)> =2017ApJ...847...18Z
ADC_Keywords: Galaxies, spectra ; Stars, masses ; Abundances ; Extinction ; Models Keywords: galaxies: abundances; galaxies: evolution; galaxies: formation; galaxies: ISM Abstract: We analyze the optical continuum of star-forming galaxies in the Sloan Digital Sky Survey by fitting stacked spectra with stellar population synthesis models to investigate the relation between stellar mass, stellar metallicity, dust attenuation, and star formation rate. We fit models calculated with star formation and chemical evolution histories that are derived empirically from multi-epoch observations of the stellar mass-star formation rate and the stellar mass-gas-phase metallicity relations, respectively. We also fit linear combinations of single-burst models with a range of metallicities and ages. Star formation and chemical evolution histories are unconstrained for these models. The stellar mass-stellar metallicity relations obtained from the two methods agree with the relation measured from individual supergiant stars in nearby galaxies. These relations are also consistent with the relation obtained from emission-line analysis of gas-phase metallicity after accounting for systematic offsets in the gas-phase metallicity. We measure dust attenuation of the stellar continuum and show that its dependence on stellar mass and star formation rate is consistent with previously reported results derived from nebular emission lines. However, stellar continuum attenuation is smaller than nebular emission line attenuation. The continuum-to-nebular attenuation ratio depends on stellar mass and is smaller in more massive galaxies. Our consistent analysis of stellar continuum and nebular emission lines paves the way for a comprehensive investigation of stellar metallicities of star-forming and quiescent galaxies. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 34 25 MZ* relation and attenuation data table4.dat 32 125 MZ*-SFR relation data
See also: B/cfht : Log of CFHT Exposures (CADC, 1979-) II/294 : SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015) J/ApJ/617/240 : Oxygen abundances in the GOODS-N field (Kobulnicky+, 2004) J/MNRAS/371/703 : MILES library of empirical spectra (Sanchez-Blazquez+, 2006) J/A+A/495/53 : Physical properties of VVDS galaxies (Lamareille+, 2009) J/ApJ/765/140 : Stacked spectra of SDSS star forming gal. (Andrews+, 2013) J/A+A/550/A115 : Oxygen abundances and properties of galaxies (Hughes+, 2013) J/ApJ/779/102 : Metallicities of RGB stars in dwarf galaxies (Kirby+, 2013) J/A+A/581/A103 : CALIFA survey across the Hubble sequence (Gonzalez+, 2015) http://wwwmpa.mpa-garching.mpg.de/SDSS/DR7/ : MPA-JHU DR7 release http://www.sdss3.org/ : SDSS-III home page Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 F5.2 [Msun] Mass [8.5/11] Mass; log(M*/M) 7- 15 F9.6 [Sun] LBSPSZ [-0.6/0.08] LookBack Stellar Population Synthesis (LBSPS) model metallicity log(Z/Z) 17- 25 F9.6 [Sun] SSBZ [-0.7/0.07] Sequential Single-Burst (SSB) model metallicity log(Z/Z) 27- 34 F8.6 mag Av [0.1/0.8] Visual attenuation
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 5 F5.2 [Msun] logMass [8.5/11] log of Mass 7- 13 F7.4 [Msun/yr] logSFR [-1/1.4] log of star formation rate (1) 15- 23 F9.6 [Sun] logZ [-0.8/0.09] Metallicity from fitting Sequential Single-Burst (SSB) models 25- 32 F8.6 mag Av [0.1/1] Dust attenuation
Note (1): Median SFR corresponding to stacked spectra. See Figure 9.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 28-May-2018
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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