Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12666/628
Title: | A Complete 16 μm Selected Galaxy Sample at z ∼ 1: Mid-infrared Spectral Energy Distributions |
Authors: | Huang, J. S. Dai, Y. S. Willner, S. P. Faber, S. M. Cheng, C. Xu, H. Yan, H. Wu, S. Shao, X. Hao, C. Xia, X. Rigopoulou, D. Pereira Santaella, M. Magdis, Georgios E. Cortzen, I. Fazio, G. G. Assmann, P. Fan, L. Musin, M. Zang, Z. Xu, K. C. He, C. Jin, G. Esamdin, A. |
Keywords: | Infrared galaxies;Luminous infrared galaxies;Sky surveys;Spectral energy distribution |
Issue Date: | 28-May-2021 |
Publisher: | IOP Science Publishing |
DOI: | 10.3847/1538-4357/abec50 |
Published version: | https://iopscience.iop.org/article/10.3847/1538-4357/abec50 |
Citation: | The Astrophysical Journal 912(2): 161(2021) |
Abstract: | We describe a complete, flux-density-limited sample of galaxies at redshift 0.8 < z < 1.3 selected at 16 μm. At the selection wavelength near 8 μm rest, the observed emission comes from both dust heated by intense star formation and active galactic nuclei (AGNs). Fitting the spectral energy distributions (SEDs) of the sample galaxies to local-galaxy templates reveals that more than half the galaxies have SEDs dominated by star formation. About one-sixth of the galaxy SEDs are dominated by an AGN, and nearly all of the rest of the SEDs are composite. Comparison with X-ray and far-infrared observations shows that combinations of luminosities at rest-frame 4.5 and 8 μm give good measures of both AGN luminosity and star formation rate. The sample galaxies mostly follow the established star-forming main sequence for z = 1 galaxies, but of the galaxies more than 0.5 dex above that main sequence, more than half have AGN-type SEDs. Similarly, the most luminous AGNs tend to have higher star formation rates than the main-sequence value. Galaxies with stellar masses >1011 M⊙ are unlikely to host an AGN. About 1% of the sample galaxies show an SED with dust emission typical of neither star formation nor an AGN. |
URI: | http://hdl.handle.net/20.500.12666/628 |
E-ISSN: | 1538-4357 |
ISSN: | 0004-637X |
Appears in Collections: | (CAB) Artículos |
Files in This Item:
File | Description | Size | Format | |
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Huang_2021_ApJ_912_161.pdf | 2,16 MB | Adobe PDF | View/Open |
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