Publication | Closed Access
Thermal infrared and nonthermal radio - Remarkable correlation in disks of galaxies
903
Citations
0
References
1985
Year
A tight, linear correlation between far‑infrared flux from IRAS and nonthermal radio flux density at 1.4 GHz has been established for spiral galaxy disks, defining an infrared‑to‑radio ratio characteristic of star‑formation activity, and indicating that supernova remnants contribute less than 10 % of the radio emission if far‑infrared traces young massive stars. Galaxies with nuclear starbursts follow the correlation, and the results indicate a close coupling between dust heating and cosmic‑ray generation and confinement across a wide range of conditions. Published in The Astrophysical Journal (Nov 1985, DOI 10.1086/184556).
view Abstract Citations (1019) References (26) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Thermal infrared and nonthermal radio : remarkable correlation in disks of galaxies. Helou, G. ; Soifer, B. T. ; Rowan-Robinson, M. Abstract A tight, linear correlation is established between the far-infrared flux measured by IRAS and the nonthermal radio flux density (at 1.4 GHz) from disks of spiral galaxies. This correlation defines a ratio of infrared to radio fluxes that is characteristic of star formation activity. Galaxies with nuclear starbursts seem to follow the correlation. If the far-infrared is reradiated luminosity from young massive stars, then the supernova remnants alone account for less than 10 percent of the radio emission. These results indicate a close coupling between dust heating and cosmic-ray generation and confinement in a wide range of conditions. Publication: The Astrophysical Journal Pub Date: November 1985 DOI: 10.1086/184556 Bibcode: 1985ApJ...298L...7H Keywords: Far Infrared Radiation; Nonthermal Radiation; Radio Sources (Astronomy); Spiral Galaxies; Stellar Evolution; Disks; Radio Emission; Virgo Galactic Cluster; Astrophysics full text sources ADS | data products SIMBAD (12) NED (9)