NO EVIDENCE FOR EVOLUTION IN THE FAR-INFRARED-RADIO CORRELATION OUT TO z similar to 2 IN THE EXTENDED CHANDRA DEEP FIELD SOUTH

作者：Mao Minnie Y^*; Huynh Minh T; Norris Ray P; Dickinson Mark; Frayer Dave; Helou George; Monkiewicz Jacqueline A

来源：Astrophysical Journal, 2011, 731(2): 79.

DOI：10.1088/0004-637X/731/2/79

• Galaxy: evolution
• Galaxy: formation
• infrared: galaxies
• radio continuum: galaxies

We investigate the 70 mu m far-infrared-radio correlation (FRC) of star-forming galaxies in the Extended Chandra Deep Field South (ECDFS) out to z > 2. We use 70 mu m data from the Far-Infrared Deep Extragalactic Legacy Survey (FIDEL), which comprises the most sensitive (similar to 0.8 mJy rms) and extensive far-infrared deep field observations using MIPS on the Spitzer Space Telescope, and 1.4 GHz radio data (similar to 8 mu Jy beam(-1) rms) from the Very Large Array. In order to quantify the evolution of the FRC, we use both survival analysis and stacking techniques, which we find give similar results. We also calculate the FRC using total infrared luminosity and rest-frame radio luminosity, q(TIR), and find that q(TIR) is constant (within 0.22) over the redshift range 0-2. We see no evidence for evolution in the FRC at 70 mu m, which is surprising given the many factors that are expected to change this ratio at high redshifts.

• 出版日期2011-4-20
• 单位CSIRO