The history of star-forming galaxies in the Sloan Digital Sky Survey

By N. Asari, R. C. Fernandes, G. Stasińska, J. P. Torres-Papaqui, A. Mateus, L. Sodré, William Schoenell, J. Gomes, for the SEAGal collaboration Ufsc, Brazil and 7 more. 2007

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This paper, the sixth in the Semi-Empirical Analysis of Galaxies series, studies the evolution of 82 302 star-forming (SF) galaxies from the Sloan Digital Sky Survey. Star formation histories (SFHs) are derived from detailed spectral fits obtained with our publicly available spectral synthesis code STARLIGHT. Our main goals are to explore new ways to derive SFHs from the synthesis results and apply them to investigate how SFHs vary as a function of nebular metallicity (Zneb). A number of refinements over our previous work are introduced, including (1) an improved selection criterion; (2) a careful examination of systematic residuals around Hβ; (3) self-consistent determination of nebular extinctions and metallicities; (4) tests with several Zneb estimators; (5) a study of the effects of the reddening law adopted and of the relation between nebular and stellar extinctions and the interstellar component of the Na I D doublet.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/7aee127d477125d13db735dffc14a93151ad563b

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Citations in the corpus

Galaxies with Wolf-Rayet signatures in the low-redshift Universe. A survey using the Sloan Digital Sky Survey (2008, methodology): “In particular the BC03 models with the STELIB library (Le Borgne et al. 2003) do show residual calibration features around Hβ (also noted by Asari et al. 2007), which serve to introduce features close to the expected location of the WR bumps and hence severely increase the number of false positives.”
Predicting dust extinction from the stellar mass of a galaxy (2010, background): “…(e.g. Wang & Heckman 1996), SFR (e.g. Hopkins et al. 2001; Sullivan et al. 2001; Berta et al. 2003; Garn et al. 2010), stellar mass (e.g. Brinchmann et al. 2004; Stasińska et al. 2004; Pannella et al. 2009) and metallicity (e.g. Heckman et al. 1998; Boissier et al. 2004; Asari et al. 2007).”
The CALIFA survey across the Hubble sequence: Spatially resolved stellar population properties in galaxies (2015, background): “For instance, in Gallazzi et al. (2005) metallicities are averaged logarithmically, whereas Asari et al. (2007) work with arithmetic averages.”
A characteristic oxygen abundance gradient in galaxy disks unveiled with CALIFA (2013, background): “There is a clear gradient/correlation between the percentage of young stars and the [N ii]/Hα ratio, reflecting the known downsizing-like A49, page 7 of 25 variation in the specific SFR along the SF branch of the BPT diagram (Asari et al. 2007).”
The star formation history of CALIFA galaxies: Radial structures (2013, methodology): “Further, this technique, that has been ex- tensively applied to single SDSS spectra of galaxies (e.g. Cid Fernandes et al. 2005, 2007; Asari et al. 2007), successfully produces the 2D distribution of the stellar population properties when applied to CALIFA data cubes (Cid Fernandes et al. 2013a).”
OPTICAL SPECTROSCOPY AND NEBULAR OXYGEN ABUNDANCES OF THE SPITZER/SINGS GALAXIES (2010, background): “…spectrum of a galaxy from its integrated emission-line spectrum, so that the emission-line strengths can be studied free from the systematic effects of Balmer and metal-line absorption (e.g., Brinchmann et al. 2004; Cid Fernandes et al. 2005; Moustakas & Kennicutt 2006a; Asari et al. 2007).”
Alternative diagnostic diagrams and the 'forgotten' population of weak line galaxies in the SDSS (2009, methodology): “As noted by Asari et al. (2007), the Bruzual & Charlot (2003) models have a low amplitude hump in the ∼100 Å interval around Hβ, such that Hβ emission often sits in a slightly negative valley in the observed minus model spectrum (an artefact of the STELIB library, which disappears when using models…”