| Autor: |
Magnelli, B., Ivison, R. J., Lutz, D., Valtchanov, I., Farrah, D., Berta, S., Bertoldi, F., Bock, J., Cooray, A., Ibar, E., Karim, A., Floc'h, E. Le, Nordon, R., Oliver, S. J., Page, M., Popesso, P., Pozzi, F., Rigopoulou, D., Riguccini, L., Rodighiero, G., Rosario, D., Roseboom, I., Wang, L., Wuyts, S. |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
A&A 573, A45 (2015) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1051/0004-6361/201424937 |
| Popis: |
[Abridged] We study the evolution of the radio spectral index and far-infrared/radio correlation (FRC) across the star-formation rate-stellar masse (i.e. SFR-M*) plane up to z 2. We start from a M*-selected sample of galaxies with reliable SFR and redshift estimates. We then grid the SFR-M* plane in several redshift ranges and measure the infrared luminosity, radio luminosity, radio spectral index, and ultimately the FRC index (i.e. qFIR) of each SFR-M*-z bin. The infrared luminosities of our SFR-M*-z bins are estimated using their stacked far-infrared flux densities inferred from observations obtained with Herschel. Their radio luminosities and radio spectral indices (i.e. alpha, where Snu nu^-alpha) are estimated using their stacked 1.4GHz and 610MHz flux densities from the VLA and GMRT, respectively. Our far-infrared and radio observations include the most widely studied blank extragalactic fields -GOODS-N/S, ECDFS, and COSMOS- covering a sky area of 2deg^2. Using this methodology, we constrain the radio spectral index and FRC index of star-forming galaxies with M*>10^10Msun and 0Comment: Accepted for publication in A&A; 18 pages, 10 figures |
| Databáze: |
arXiv |
| Externí odkaz: |
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