Average radio spectral energy distribution of highly star-forming galaxies

Tisanić, K.; Smolčić, V.; Delhaize, J.; Novak, M.; Intema, H.; Delvecchio, I.; Schinnerer, E.; Zamorani, G.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Proceedings

Average radio spectral energy distribution of highly star-forming galaxies

MPS-Authors

Tisanić, K.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Smolčić, V.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Delhaize, J.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Novak, M.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Intema, H.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Delvecchio, I.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Schinnerer, E.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

Zamorani, G.
Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;

External Resource

https://ui.adsabs.harvard.edu/abs/2018IAUS..333..191T
(Any fulltext)

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Tisanić, K., Smolčić, V., Delhaize, J., Novak, M., Intema, H., Delvecchio, I., et al. (2018). Average radio spectral energy distribution of highly star-forming galaxies.

Cite as: https://hdl.handle.net/21.11116/0000-0005-CAAC-6

Abstract

The infrared-radio correlation (IRRC) offers a way to assess star formation from radio emission. Multiple studies found the IRRC to decrease with increasing redshift. This may in part be due to the lack of knowledge about the possible radio spectral energy distributions (SEDs) of star-forming galaxies. We constrain the radio SED of a complete sample of highly star-forming galaxies (SFR > 100 M_☉/ yr) based on the VLA-COSMOS 1.4 GHz Joint and 3 GHz Large Project catalogs. We reduce archival GMRT 325 MHz and 610 MHz observations, broadening the rest-frame frequency range to 0.3-15 GHz. Employing survival analysis and fitting a double power law SED, we find that the slope steepens from a spectral index of α₁ = 0.51+/-0.04 below 4.5 GHz to α₂ = 0.98+/-0.07 above 4.5 GHz. Our results suggest that the use of a K-correction assuming a single power-law radio SED for star forming galaxies is likely not the root cause of the IRRC trend.