NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-25 T23:54:53 PDT
Help | Comment | NED Home

For refcode 2003A&A...399...39R:
Retrieve 30 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
2003A&A...399...39R The 2-10 keV luminosity as a Star Formation Rate indicator P. Ranalli, A. Comastri, G. Setti 1 - Dipartimento di Astronomia, Universita di Bologna, via Ranzani 1, 40127 Bologna, Italy 2 - INAF - Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy Received 30 July 2002 / Accepted 4 November 2002 Abstract. Radio and far infrared luminosities of star-forming galaxies follow a tight linear relation. Making use of ASCA and BeppoSAX observations of a well-defined sample of nearby star-forming galaxies, we argue that tight linear relations hold between the X-ray, radio and far infrared luminosities. The effect of intrinsic absorption is investigated taking NGC 3256 as a test case. It is suggested that the hard X-ray emission is directly related to the Star Formation Rate. Star formation processes may also account for most of the 2-10 keV emission from LLAGNs of lower X-ray luminosities (for the same FIR and radio luminosity). Deep Chandra observations of a sample of radio-selected star-forming galaxies in the Hubble Deep Field North show that the same relation holds also at high ( 0.2 ~< z ~< 1.3) redshift. The X-ray/radio relations also allow a derivation of X-ray number counts up to very faint fluxes from the radio Log N-Log S, which is consistent with current limits and models. Thus the contribution of star-forming galaxies to the X-ray background can be estimated. Key words: X-rays: galaxies - radio continuum: galaxies - galaxies: high-redshift - infrared: galaxies - galaxies: fundamental parameters - galaxies: starburst
Retrieve 30 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home