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Propeties of H alpha emitters at z ∼ 2.3: Derivation of H alpha luminosity from multi-band photometry

Published online by Cambridge University Press:  10 June 2020

Yasunori Terao ,
Lee Spitler  and
Kentaro Motohara
Yasunori Terao
Affiliation:
Institute of Astronomy, Graduate School of Science, The University of Tokyo, 2-21-1, Osawa, Mitaka, Tokyo181-0015, Japan
Lee Spitler
Affiliation:
Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109, Australia
Kentaro Motohara
Affiliation:
Institute of Astronomy, Graduate School of Science, The University of Tokyo, 2-21-1, Osawa, Mitaka, Tokyo181-0015, Japan
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Abstract

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The measurement of Hα luminosity for large numbers of galaxies is important to investigate recent star formation history of galaxies. With SED fitting that includes emission line templates, we extract individual galaxy Hα luminosities from broad-band photometry. We compare Hα luminosity function with the result of a narrow-band survey, HiZELS, and find there are more luminous galaxies in Hα than previously reported. As a result, our derived star formation rate density at z ∼ 2.3 turns out to be 2.2 times higher than previous studies. Most of the offset in the results can be explained by missing Hα in the HiZELS photometric aperture and different methods for dust extinction correction.

Keywords

galaxies: evolutionhigh-redshiftluminosity functionphotometry
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S341: Challenges in Panchromatic Modelling with Next Generation Facilities , November 2019 , pp. 316 - 317
Copyright
© International Astronomical Union 2020

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