The far-infrared/radio correlation as probed by Herschel

By R. Ivison, R. Ivison, B. Magnelli, E. Ibar, P. Andreani, D. Elbaz, B. Altieri, A. Amblard, V. Arumugam, R. Auld and 97 more. 2010

153 citations recorded by the source corpus.

We set out to determine the ratio, q(IR), of rest-frame 8-1000um flux, S(IR), to monochromatic radio flux, S(1.4GHz), for galaxies selected at far-IR and radio wavelengths, to search for signs that the ratio evolves with redshift, luminosity or dust temperature, and to identify any far-IR-bright outliers - useful laboratories for exploring why the far-IR/radio correlation is generally so tight when the prevailing theory suggests variations are almost inevitable. We use flux-limited 250-um and 1.4-GHz samples, obtained in GOODS-N using Herschel (HerMES; PEP) and the VLA. We determine bolometric IR output using ten bands spanning 24-1250um, exploiting data from PACS and SPIRE, as well as Spitzer, SCUBA, AzTEC and MAMBO. We also explore the properties of an L(IR)-matched sample, designed to reveal evolution of q(IR) with z, spanning log L(IR) = 11-12 L(sun) and z=0-2, by stacking into the radio and far-IR images. For 1.4-GHz-selected galaxies, we see tentative evidence of a break in the flux ratio, q(IR), at L(1.4GHz) ~ 10^22.7 W/Hz, where AGN are starting to dominate the radio power density, and of weaker correlations with z and T(d). From our 250-um-selected sample we identify a small number of far-IR-bright outliers, and see trends of q(IR) with L(1.4GHz), L(IR), T(d) and z, noting that some of these are inter-related. For our L(IR)-matched sample, there is no evidence that q(IR) changes significantly as we move back into the epoch of galaxy formation: we find q(IR) goes as (1+z)^gamma, where gamma = -0.04 +/- 0.03 at z=0-2; however, discounting the least reliable data at z 1.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/8e2fdede718c22e1e46a0ebf10066df0bf8a0e0b

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

Citations in the corpus

GAS AND DUST IN A SUBMILLIMETER GALAXY AT z = 4.24 FROM THE HERSCHEL ATLAS (2011, methodology): “This value is compatible with the median value q ∼ 2.4 derived for starburst samples selected from the Balloon-borne Large-Aperture Telescope (BLAST) or the Herschel GOODS-North surveys (Ivison et al. 2010a, 2010b; Jarvis et al. 2010).”
GeV OBSERVATIONS OF STAR-FORMING GALAXIES WITH THE FERMI LARGE AREA TELESCOPE (2012, background): “Although we are unable to validate this assertion directly, the closely-related RC-IR correlation does not show signs of evlution up toz∼ 2 (Ivison et al. 2010), and possibly to redshifts z & 4 (Sargent et al. 2010).”
Kiloparsec-scale outflows are prevalent among luminous AGN: outflows and feedback in the context of the overall AGN population (2014, methodology): “To do this we use the definition given by Ivison et al. (2010) (see also Helou t al.”
AN ALMA SURVEY OF SUB-MILLIMETER GALAXIES IN THE EXTENDED CHANDRA DEEP FIELD SOUTH: PHYSICAL PROPERTIES DERIVED FROM ULTRAVIOLET-TO-RADIO MODELING (2015, methodology): “A lack of strong redshift evolution of the radio/far-infrared correlation is supported by several studies (e.g., Ibar et al. 2008; Ivison et al. 2010; Sargent et al. 2010; Huang et al. 2014; Thomson et al. 2014), and our fits (e.g., Figure 2) show that this assumption is sufficient to reproduce the…”
GOODS-HERSCHEL: STAR FORMATION, DUST ATTENUATION, AND THE FIR–RADIO CORRELATION ON THE MAIN SEQUENCE OF STAR-FORMING GALAXIES UP TO z ≃ 4 (2014, background): “Some recentHerschel-FIR based studies have claimed a redshift evolution of the correlation (e.g., Ivison et al. 2010; Magnelli et al. 2012; Casey et al. 2012, but see also e.g., Strazzullo et al. 2010; Bourne et al. 2011; Del Moro et al. 2013 for different conclusions), with increasing radio…”