# Post-starburst galaxies and the transformation of blue into red galaxies

Sven De Rijcke (UGent) , Pieter Buyle (UGent) and Herwig Dejonghe (UGent)
(2009) 330. p.954-959
Author
Organization
Abstract
Abstract We present deep single-dish radio observations of a sample of nearby post-starburst galaxies (0.05 < z < 0.1). About 50% of these post-starburst galaxies are detected at 21 cm, with H I masses of ˜ 109 M_ȯ, up to ˜ 1010 M_ȯ. These post-starburst galaxies are as gas-rich as spiral galaxies with comparable luminosities. There appears to exist no direct correlation between the amount of H I present in a post-starburst galaxy and its star formation rate as traced by radio continuum emission. Moreover, the end of the starburst clearly does not necessarily require the complete exhaustion of the neutral gas reservoir. High-resolution radio observations of one post-starburst binary system suggest that most of the neutral gas resides outside the stellar bodies of the galaxies. Most likely, the gas was expelled by supernova and/or AGN feedback. This effectively stops star formation, even though copious amounts of diffuse neutral gas remain in the immediate vicinity. This remaining H I reservoir may eventually lead to further episodes of star formation. This may indicate that some post-starbursts are observed in the inactive phase of the star formation duty cycle.
Keywords
galaxies: evolution, galaxies: fundamental parameters, galaxies: elliptical and Lenticular, cD, galaxies: ISM

## Citation

Please use this url to cite or link to this publication:

Chicago
De Rijcke, Sven, Pieter Buyle, D. J. Pisano, Ken Freeman, and Herwig Dejonghe. 2009. “Post-starburst Galaxies and the Transformation of Blue into Red Galaxies.” Astronomische Nachrichten 330: 954–959.
APA
De Rijcke, S., Buyle, P., Pisano, D. J., Freeman, K., & Dejonghe, H. (2009). Post-starburst galaxies and the transformation of blue into red galaxies. Astronomische Nachrichten, 330, 954–959. Presented at the Symposium on Matter Cycles of Galaxies in Clusters held at the JENAM 2008 Meeting.
Vancouver
1.
De Rijcke S, Buyle P, Pisano DJ, Freeman K, Dejonghe H. Post-starburst galaxies and the transformation of blue into red galaxies. Astronomische Nachrichten. Weinheim: WILEY; 2009;330:954–9.
MLA
De Rijcke, Sven, Pieter Buyle, D. J. Pisano, et al. “Post-starburst Galaxies and the Transformation of Blue into Red Galaxies.” Astronomische Nachrichten 330 (2009): 954–959. Print.
```@article{954465,
abstract     = {Abstract
We present deep single-dish radio observations of a sample of nearby post-starburst galaxies (0.05 {\textlangle} z {\textlangle} 0.1). About 50\% of these post-starburst galaxies are detected at 21 cm, with H I masses of {\textasciitilde} 109 M\_\unmatched{022f}, up to {\textasciitilde} 1010 M\_\unmatched{022f}. These post-starburst galaxies are as gas-rich as spiral galaxies with comparable luminosities. There appears to exist no direct correlation between the amount of H I present in a post-starburst galaxy and its star formation rate as traced by radio continuum emission. Moreover, the end of the starburst clearly does not necessarily require the complete exhaustion of the neutral gas reservoir. High-resolution radio observations of one post-starburst binary system suggest that most of the neutral gas resides outside the stellar bodies of the galaxies. Most likely, the gas was expelled by supernova and/or AGN feedback. This effectively stops star formation, even though copious amounts of diffuse neutral gas remain in the immediate vicinity. This remaining H I reservoir may eventually lead to further episodes of star formation. This may indicate that some post-starbursts are observed in the inactive phase of the star formation duty cycle.},
author       = {De Rijcke, Sven and Buyle, Pieter and Pisano, D. J. and Freeman, Ken and Dejonghe, Herwig},
issn         = {0004-6337},
journal      = {Astronomische Nachrichten},
language     = {eng},
location     = {Vienna, AUSTRIA},
pages        = {954--959},
publisher    = {WILEY},
title        = {Post-starburst galaxies and the transformation of blue into red galaxies},
url          = {http://dx.doi.org/10.1002/asna.200911270},
volume       = {330},
year         = {2009},
}

```
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