The Evolutionary Sequence of Post-Starburst Galaxies

Abstract

There are multiple ways in which to select post-starburst galaxies in the literature. In this work, we present a study into how two well-used selection techniques have consequences on observable post-starburst galaxy parameters, such as colour, morphology and environment and how this affects interpretations of their role in the galaxy duty cycle. We identify a master sample of H$\delta$ strong (EW${}_{H\delta }$ > 3Å) post-starburst galaxies from the value-added catalogue in the 7th data release of the Sloan Digital Sky Survey (SDSS DR7) over a redshift range 0.01 < $z$ < 0.1. From this sample we select two E+A subsets, both having a very little [OII] emission (EW${}_{[OII]}$ $>-2.5$Å) but one having an additional cut on EW${}_{H\alpha }$ ($>-3$Å). We examine the differences in observables and AGN fractions to see what effect the H$\alpha$ cut has on the properties of post-starburst galaxies and what these differing samples can tell us about the duty cycle of post-starburst galaxies. We find that H$\delta$ strong galaxies peak in the `blue cloud', E+As in the `green valley' and pure E+As in the `red sequence'. We also find that pure E+As have a more early-type morphology and a higher fraction in denser environments compared with the H$\delta$ strong and E+A galaxies. These results suggest that there is an evolutionary sequence in the post-starburst phase from blue disky galaxies with residual star formation to passive red early-types.

arXiv comment12 pages, 10 figures, 2 tables, accepted in mnras

References in corpus (46)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Star Formation in Galaxies Along the Hubble Sequence
• The Seventh Data Release of the Sloan Digital Sky Survey
• The Host Galaxies of AGN
• Spectroscopic Target Selection in the Sloan Digital Sky Survey: The Main Galaxy Sample
• Gasdynamics and Starbursts in Major Mergers
• A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: I. Galaxy Mergers & Quasar Activity
• Galaxy Zoo : Morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey
• The size distribution of galaxies in the Sloan Digital Sky Survey
• Galaxy Groups in the SDSS DR4: I. The Catalogue and Basic Properties
• Galaxy Zoo 1 : Data Release of Morphological Classifications for nearly 900,000 galaxies
• The Star Formation Histories of Galaxies in Distant Clusters
• The Green Valley is a Red Herring: Galaxy Zoo reveals two evolutionary pathways towards quenching of star formation in early- and late-type galaxies
• A comprehensive classification of galaxies in the SDSS: How to tell true from fake AGN?
• Galaxy Zoo: the dependence of morphology and colour on environment
• Alternative diagnostic diagrams and the "forgotten" population of weak line galaxies in the SDSS
• A Cosmological Framework for the Co-Evolution of Quasars, Supermassive Black Holes, and Elliptical Galaxies: II. Formation of Red Ellipticals
• The Environment of ``E+A'' Galaxies
• The overdensities of galaxy environments as a function of luminosity and color
• Selection and photometric properties of K+A galaxies
• 266 E+A Galaxies Selected from the Sloan Digital Sky Survey Data Release 2: The Origin of E+A Galaxies
• The environments of starburst and post-starburst galaxies at z=0.4-0.8
• Hdelta-Selected Galaxies in the Sloan Digital Sky Survey I: The Catalog
• The Nature of E+A Galaxies in Intermediate Redshift Clusters
• Where do Wet, Dry, and Mixed Galaxy Mergers Occur? A Study of the Environments of Close Galaxy Pairs in the DEEP2 Galaxy Redshift Survey
• K+A Galaxies as the Aftermath of Gas-Rich Mergers: Simulating the Evolution of Galaxies as Seen by Spectroscopic Surveys
• The 2dF Galaxy Redshift Survey: the local E+A galaxy population
• E+A Galaxies and the Formation of Early Type Galaxies at z~0
• A Catalog of Local E+A(post-starburst) Galaxies selected from the Sloan Digital Sky Survey Data Release 5
• H-alpha emitters in z~2 proto-clusters: evidence for faster evolution in dense environments
• Field E+A Galaxies at Intermediate Redshifts (0.3<z<1)
• The Spatial Distribution and Kinematics of Stellar Populations in E+A Galaxies
• K+a galaxies in the zCOSMOS Survey: Physical properties of systems in their post-starburst phase
• Formation and evolution of E+A galaxies in dusty starburst galaxies
• A new population of recently quenched elliptical galaxies in the SDSS
• A Search for HI in E+A Galaxies
• What triggers galaxy transformations? The environments of post-starburst galaxies
• Chronos and Kairos: Mosfire Observations of Post-Starburst Galaxies in z~1 Clusters and Groups
• Extinction Corrected Star Formation Rates Empirically Derived from Ultraviolet-Optical Colors
• Spatially Resolved Spectroscopy of the E+A Galaxies in the z=0.32 Cluster AC114
• Abundance diagnosis of E+A (post-starburst) galaxies
• Evidence for galaxies being pre-processed before accreted into clusters
• Active Galactic Nuclei and the Truncation of Star Formation in K+A Galaxies
• Are Dry Mergers Dry, Moist, or Wet?
• Caught in the act: Cluster `k+a' galaxies as a link between spirals and S0s
• A Panchromatic Survey of Post-starburst Mergers: searching for feedback

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