Calibration of star formation rate tracers for short- and long-lived star formation episodes: far infrared and X-ray luminosities.

Details Calibration of star formation rate tracers for short- and long-lived star formation episodes: far infrared and X-ray luminosities. Calibration of star formation rate tracers for short- and long-lived star formation episodes: far infrared and X-ray luminosities.

Nov 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sacm.confe..46o&link_type=abstract

The Starburst-AGN Connection under the Multiwavelength Limelight, held 14-16 September 2011. Published online at http://www.scio

Computer Science

Scientific paper

To derive the history of star formation in the Universe a set of calibrated star formation rate (SFR) tracers is required. Using evolutionary synthesis models, we have computed the predicted evolution of different estimators of the SFR assuming nearly-instantaneous (IB) and continuous star formation (EB) regimes, and the effect of interstellar extinction and metallicity. A self-consistent calibration of a complete set of SFR tracers in the whole electromagnetic range has been obtained, focusing here on the far infrared and X-ray luminosities (FIR and L_x). We will discuss the validity of the different tracers in different scenarios and compare our predictions with previous calibrations of general use. Also, we will show how the estimators predictions can reproduce the FIR and Lx values of a sample of star-forming galaxies assuming usual ages of starburst regions, and using typical values for the parameters considered: extinction, and efficiency in the conversion from mechanical energy injected into the medium to X-rays emission. Finally, we stress that in order to measure the intensity of star formation episodes we should distinguish between IB regimes, for which star formation strength (M_o) should be used, and EB regimes, for which the more common SFR (M_o~yr^-1) should be used.

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