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The SFR Efficiency of HI Gas in the Outskirts of Star Forming Galaxies

Published online by Cambridge University Press:  21 March 2017

Marc Rafelski
Marc Rafelski*
Affiliation:
NASA Postdoctoral Fellow at Goddard Space Flight Center Code 665, Greenbelt, MD 20771, USAmarc.a.rafelski@nasa.gov
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Abstract

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In order to understand the origin of the decreased star formation rate (SFR) efficiency of neutral atomic hydrogen gas measured in Damped Lyα Systems (DLAs) at z ~ 3, we measure the SFR efficiency of atomic gas at z ~ 1, z ~ 2, and z ~ 3 around star-forming galaxies. We create galaxy stacks in these three redshift bins, and measure the SFR efficiency by combining DLA absorber statistics with the observed rest-frame UV emission in the galaxies’ outskirts. We find that the SFR efficiency of Hi gas is ~ 3% of that predicted by the KS relation. We find no significant evolution in the SFR efficiency with redshift, although simulations and models predict a decreasing SFR efficiency with decreasing metallicity and thus with increasing redshift. We discuss possible explanations for this decreased efficiency without an evolution with redshift.

Keywords

galaxies: high-redshiftgalaxies: evolution(galaxies:) intergalactic medium(galaxies:) quasars: absorption lines
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S321: Formation and Evolution of Galaxy Outskirts , March 2016 , pp. 360 - 362
Copyright
Copyright © International Astronomical Union 2017 

References

Bigiel, F., et al. 2010b, AJ, 140, 1194 CrossRefGoogle Scholar
Elmegreen, B. G. & Hunter, D. A. 2015, ApJ, 805, 145 CrossRefGoogle Scholar
Gnedin, N. Y. & Kravtsov, A. V. 2010, ApJ, 714, 287 CrossRefGoogle Scholar
Kennicutt, R. C. 1998a, ARA&A, 36, 189 Google Scholar
Krumholz, M. R. 2013, MNRAS, 436, 2747 CrossRefGoogle Scholar
Neeleman, M., et al. 2016, ApJ, 818, 113 CrossRefGoogle Scholar
Noterdaeme, P., et al. 2012, A&A, 547, L1 Google Scholar
Rafelski, M., et al. 2016, accepted for publication in ApJ Google Scholar
Rafelski, M., et al. 2015, AJ, 150, 31 CrossRefGoogle Scholar
Rafelski, M., et al. 2012, ApJ, 755, 89 CrossRefGoogle Scholar
Rafelski, M., Wolfe, A. M., & Chen, H.-W. 2011, ApJ, 736, 48 CrossRefGoogle Scholar
Wolfe, A. M. & Chen, H.-W. 2006, ApJ, 652, 981 CrossRefGoogle Scholar