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Star formation rate in starburst galaxies |
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| Institution: | 1. Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straβe 1, 21502 Geesthacht, Germany;2. GEMS at MLZ, Helmholtz-Zentrum Geesthacht, Lichtenberg Straβe 1, 85747 Garching, Germany;3. Institut für Analytische Chemie, TU Bergakademie Freiberg, Leipziger Straβe 29, 09599 Freiberg, Germany;4. Division of Materials Science and Engineering, RWTH Aachen University, Intzestraβe 5, 52072 Aachen, Germany;1. Faculty of Materials and Manufacturing, Beijing University of Technology, 100 Pingleyuan, Chaoyang District, Beijing, 100124, PR China;2. Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthacht, Germany |
| Abstract: | The statistical investigation of integrated characteristics of the blue compact galaxies from the Second Byurakan survey has been carried out. The tight correlation between the luminosities in the far-infrared range and radio range (radio-continuum at 21 cm) has been revealed. It implies the common origin of this radiation in star forming regions. The current star formation rates have been derived both from the luminosity in the far-infrared range (SFRFIR) and from the luminosity in the radio range (SFR21 cm). The Salpeter shape of the initial mass function (IMF) and low-mass cut-off of 0.1 M⊙ in IMF has been assumed for the SFRFIR calculation. We derive the SFR21 cm assuming that radio free–free emission at λ=21 cm is thermal emission of gas ionised by massive stars. The SFR21 cm is shown to be about 3.5 times as large as SFRFIR for our sample of galaxies. These star formation rates are proposed to be considered as lower and upper limits of true galaxy star formation rates. |
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