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Date and Time of the Query: 2019-04-19 T04:03:00 PDT
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For refcode 2016MNRAS.456.1723L:
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Copyright by Royal Astronomical Society. 2016MNRAS.456.1723L CHANG-ES - VI. Probing Supernova energy deposition in spiral galaxies through multiwavelength relationships Li, Jiang-Tao; Beck, Rainer; Dettmar, Ralf-Jurgen; Heald, George; Irwin, Judith; Johnson, Megan; Kepley, Amanda A.; Krause, Marita; Murphy, E. J.; Orlando, Elena; Rand, Richard J.; Strong, A. W.; Vargas, Carlos J.; Walterbos, Rene; Wang, Q. Daniel; Wiegert, Theresa Abstract. How a galaxy regulates its supernovae (SNe) energy into different interstellar/circumgalactic medium components strongly affects galaxy evolution. Based on the JVLA D-configuration C- (6 GHz) and L-band (1.6 GHz) continuum observations, we perform statistical analysis comparing multiwavelength properties of the Continuum Haloes in Nearby Galaxies - an EVLA Survey galaxies. The high-quality JVLA data and edge-on orientation enable us for the first time to include the halo into the energy budget for a complete radio-flux-limited sample. We find tight correlations of L_radio_ with the mid-IR-based star formation rate (SFR). The normalization of our I_1.6 GHz_/W Hz^-1^-SFR relation is ~2-3times of those obtained for face-on galaxies, probably a result of enhanced IR extinction at high inclination. We also find tight correlations between L_radio_ and the SNe energy injection rate dot{E}_SN(Ia+CC), indicating the energy loss via synchrotron radio continuum accounts for ~1 of dot{E}_SN, comparable to the energy contained in cosmic ray electrons. The integrated C-to-L-band spectral index is {alpha} ~ 0.5-1.1 for non-active galactic nucleus galaxies, indicating a dominance by the diffuse synchrotron component. The low-scatter L_radio_-SFR/L_radio-dot{E}_{SN (Ia+CC)}_ relationships have superlinear logarithmic slopes at ~2sigma in L band (1.132 +/- 0.067/1.175 +/- 0.102) while consistent with linear in C band (1.057 +/- 0.075/1.100 +/- 0.123). The superlinearity could be naturally reproduced with non-calorimeter models for galaxy discs. Using Chandra halo X-ray measurements, we find sublinear L_X_-L_radio_ relations. These results indicate that the observed radio halo of a starburst galaxy is close to electron calorimeter, and a galaxy with higher SFR tends to distribute an increased fraction of SNe energy into radio emission (than X-ray). Key words: galaxies: haloes, galaxies: spiral, galaxies: statistics, infrared: galaxies, radio continuum: galaxies, X-rays: galaxies
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