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Panchromatic Estimation of Star Formation Rates in BzK Galaxies at 1 < z < 3

Kurczynski, Peter and Gawiser, Eric and Huynh, Minh and Ivison, Rob J. and Treister, Ezequiel and Smail, Ian and Blanc, Guillermo A. and Cardamone, Carolin N. and Greve, Thomas R. and Schinnerer, Eva and Urry, Meg and van der Werf, Paul (2012) Panchromatic Estimation of Star Formation Rates in BzK Galaxies at 1 < z < 3. Astrophysical Journal, 750 (2). Art. No. 117. ISSN 0004-637X.

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We determine star formation rates (SFRs) in a sample of color-selected, star-forming (sBzK) galaxies (K_(AB) < 21.8) in the Extended Chandra Deep Field-South. To identify and avoid active galactic nuclei, we use X-ray, IRAC color, and IR/radio flux ratio selection methods. Photometric redshift-binned, average flux densities are measured with stacking analyses in Spitzer-MIPS IR, BLAST and APEX/LABOCA submillimeter, VLA and GMRT radio, and Chandra X-ray data. We include averages of aperture fluxes in MUSYC UBVRIz'JHK images to determine UV-through-radio spectral energy distributions. We determine the total IR luminosities and compare SFR calibrations from FIR, 24 μm, UV, radio, and X-ray wavebands. We find consistency with our best estimator, SFR_(IR + UV), to within errors for the preferred radio SFR calibration. Our results imply that 24 μm only and X-ray SFR estimates should be applied to high-redshift galaxies with caution. Average IR luminosities are consistent with luminous infrared galaxies. We find SFR_(IR + UV) for our stacked sBzKs at median redshifts 1.4, 1.8, and 2.2 to be 55 ± 6 (random error), 74 ± 8, and 154 ± 17 M_☉ yr^(–1), respectively, with additional systematic uncertainty of a factor of ~2.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ivison, Rob J.0000-0001-5118-1313
Treister, Ezequiel0000-0001-7568-6412
Smail, Ian0000-0003-3037-257X
Schinnerer, Eva0000-0002-3933-7677
Urry, Meg0000-0002-0745-9792
van der Werf, Paul0000-0001-5434-5942
Additional Information:© 2012 American Astronomical Society. Received 2011 December 13; accepted 2012 February 29; published 2012 April 23. We acknowledge valuable conversations with and comments by Viviana Acquaviva, Eric Bell, Nicholas Bond, Lucia Guaita, Bret Lehmer, Felipe Menanteau, and Axel Weiss, and we thank LESS for providing the 870μm data, obtained from LABOCA APEX RUN IDs: 078.F-9028(A), 079.F-9500(A), 080.A-3023(A), and 081.F-9500(A). Support for this work was provided by the National Science Foundation under grants AST-0807570 and AST-1055919 and by NASA through an award issued by JPL/Caltech. E.G. thanks U.C. Davis for hospitality during the preparation of this manuscript. Support for the work of E.T. was provided by the National Aeronautics and Space Administration through Chandra Postdoctoral Fellowship Award Number PF8-90055 issued by the Chandra X-ray Observatory Center, which is operated by the Smithsonian Astrophysical Observatory on behalf of the National Aeronautics and Space Administration under contract NAS8-03060.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
NASA Chandra FellowshipPF8-90055
Subject Keywords:galaxies: high-redshift; galaxies: statistics; infrared: general; radio continuum: general; submillimeter: general
Issue or Number:2
Record Number:CaltechAUTHORS:20120530-102721436
Persistent URL:
Official Citation:Panchromatic Estimation of Star Formation Rates in BzK Galaxies at 1 < z < 3 Peter Kurczynski et al. 2012 ApJ 750 117
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31709
Deposited By: Ruth Sustaita
Deposited On:30 May 2012 18:34
Last Modified:09 Mar 2020 13:19

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