Local starburst galaxies and their descendants
Nils Bergvall, Thomas Marquart, Michael J. Way, Anna Blomqvist, Emma, Holst, G\"oran \"Ostlin, Erik Zackrisson

TL;DR
This study rigorously defines and analyzes local starburst and post-starburst galaxies, revealing their properties, contribution to stellar mass, and relationship with active galactic nuclei, highlighting their transient nature and evolutionary links.
Contribution
It provides a strict definition of starburst galaxies, analyzes their statistical properties, and explores their evolutionary connection to post-starburst galaxies and AGNs using SDSS data.
Findings
Starbursts are rare, constituting about 1% of star-forming galaxies.
Starbursts contribute 3-6% to local stellar production.
Starburst ages are typically around 70 Myr, with a strong dependence of the birthrate parameter on age.
Abstract
Despite strong interest in the starburst (hereafter SB) phenomenon, the concept remains ill-defined. We use a strict definition of SB to examine the statistical properties of local SB and post-starburst (hereafter PB) galaxies. We also seek relationships to active galaxies. Potential SB galaxies are selected from the SDSS DR7 and their stellar content is analysed. We apply an age dependent dust attenuation correction and derive star formation rates (SFR), ages and masses of the young and old populations. The photometric masses nicely agree with dynamical masses derived from the H-alpha emission line width. To select SB galaxies, we use the birthrate parameter b=SFR/<SFR>, requiring b>=3. The PB sample is selected from the citerion EW(Hdelta_abs)>=6 A. Only 1% of star-forming galaxies are found to be SB galaxies. They contribute 3-6% to the stellar production and are therefore…
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