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A Multi-wavelength View of the Star Formation Activity at z~3 by Magdis, Georgios E.; Elbaz, David; Daddi, Emanuele; Morrison, Glenn E.; Dickinson, Mark; Rigopoulou, Dimitra; Gobat, Raphael; Hwang, Ho Seong is a scholarly article available to read on EtoBox.

What is A Multi-wavelength View of the Star Formation Activity at z~3 about?

We present a multi-wavelength, UV-to-radio analysis for a sample of massive (M$_{\ast}$ $\sim$ 10$^{10}$ M$_\odot$) IRAC- and MIPS 24$\mu$m-detected Lyman Break Galaxies (LBGs) with spectroscopic redshifts z$\sim$3 in the GOODS-North field (L$_{\rm UV}$$>1.8\times$L$^{\ast}_{z=3}$). For LBGs without individual 24$\mu$m detections, we employ stacking techniques at 24$\mu$m, 1.1mm and 1.4GHz, to construct the average UV-to-radio spectral energy distribution and find it to be consistent with that of a Luminous Infrared Galaxy (LIRG) with L$\rm_{IR}$=4.5$^{+1.1}_{-2.3}$$\times 10^{11}$ L$_{\odot}$ and a specific star formation rate (SSFR) of 4.3 Gyr$^{-1}$ that corresponds to a mass doubling time $\sim$230 Myrs. On the other hand, when considering the 24$\mu$m-detected LBGs we find among them galaxies with L$\rm_{IR}> 10^{12}$ L$_{\odot}$, indicating that the space density of $z\sim$3 UV-selected Ultra-luminous Infrared Galaxies (ULIRGs) is $\sim$(1.5$\pm$0.5)$\times 10^{-5}$ Mpc$^{-3}$. We compare measurements of star formation rates (SFRs) from data at different wavelengths and find that there is tight correlation (Kendall's $\tau >$ 99.7%) and excellent agreement between the values

Author

Magdis, Georgios E.; Elbaz, David; Daddi, Emanuele; Morrison, Glenn E.; Dickinson, Mark; Rigopoulou, Dimitra; Gobat, Raphael; Hwang, Ho Seong

Published

2010

Language

EN