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arXiv · 1010.0290

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

Peter Kurczynski·Eric Gawiser·Minh Huynh·Rob J. Ivison·Ezequiel Treister·Ian Smail·Guillermo A. Blanc·Carolin N. Cardamone·Thomas R. Greve·Eva Schinnerer·Meg Urry·Paul van der Werf
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Abstract

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 micron, 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 micron 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 Msun yr^-1 respectively, with additional systematic uncertainty of a factor of ~2.

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Peter Kurczynski, Eric Gawiser, Minh Huynh, Rob J. Ivison, Ezequiel Treister, Ian Smail, Guillermo A. Blanc, Carolin N. Cardamone, Thomas R. Greve, Eva Schinnerer, Meg Urry, Paul van der Werf. 2010-10-02. Panchromatic Estimation of Star Formation Rates in BzK Galaxies at 1<z<3. https://doi.org/10.1088/0004-637x/750/2/117

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