CHANG-ES - VI. Probing Supernova energy deposition in spiral galaxies through multiwavelength relationships
| Autor: | M. Johnson, Andrew W. Strong, Carlos J. Vargas, Amanda A. Kepley, Q. Daniel Wang, Rene A. M. Walterbos, Marita Krause, Theresa Wiegert, Eric J. Murphy, George Heald, Elena Orlando, Ralf-Jürgen Dettmar, Rainer Beck, Jiang-Tao Li, Richard J. Rand, Judith A. Irwin |
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| Přispěvatelé: | Astronomy, Li, Jt, Beck, R, Dettmar, Rj, Heald, G, Irwin, J, Johnson, M, Kepley, Aa, Krause, M, Murphy, Ej, Orlando, E, Rand, Rj, Strong, Aw, Vargas, Cj, Walterbos, R, Wang, Qd, Wiegert, T |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
galaxies: spiral
Cosmology and Nongalactic Astrophysics (astro-ph.CO) Radio galaxy Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Galaxy merger 01 natural sciences infrared: galaxies Galactic halo 0103 physical sciences statistic [galaxies] Interacting galaxy 010303 astronomy & astrophysics Lenticular galaxy Astrophysics::Galaxy Astrophysics galaxies: statistics Physics Luminous infrared galaxy High Energy Astrophysical Phenomena (astro-ph.HE) radio continuum: galaxies 010308 nuclear & particles physics haloe [galaxies] Astronomy Astronomy and Astrophysics Astrophysics - Astrophysics of Galaxies Galaxy galaxies [X-rays] galaxie [infrared] galaxies: haloes X-rays: galaxies spiral [galaxies] Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Elliptical galaxy galaxie [radio continuum] Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society, 456(2), 1723-1738. Oxford University Press |
| ISSN: | 0035-8711 |
| Popis: | How a galaxy regulates its 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 multi-wavelength properties of the CHANG-ES 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 $L_{\rm radio}$ with the mid-IR-based SFR. The normalization of our $I_{\rm 1.6GHz}/{\rm W~Hz^{-1}}-{\rm SFR}$ relation is $\sim$2-3 times of those obtained for face-on galaxies, probably a result of enhanced IR extinction at high inclination. We also find tight correlations between $L_{\rm radio}$ and the SNe energy injection rate $\dot{E}_{\rm SN(Ia+CC)}$, indicating the energy loss via synchrotron radio continuum accounts for $\sim0.1\%$ of $\dot{E}_{\rm SN}$, comparable to the energy contained in CR electrons. The integrated C-to-L-band spectral index is $\alpha\sim0.5-1.1$ for non-AGN galaxies, indicating a dominance by the diffuse synchrotron component. The low-scatter $L_{\rm radio}-{\rm SFR}$/$L_{\rm radio}-\dot{E}_{\rm SN (Ia+CC)}$ relationships have super-linear logarithmic slopes at $\sim2~\sigma$ in L-band ($1.132\pm0.067$/$1.175\pm0.102$) while consistent with linear in C-band ($1.057\pm0.075$/$1.100\pm0.123$). The super-linearity could be naturally reproduced with non-calorimeter models for galaxy disks. Using Chandra halo X-ray measurements, we find sub-linear $L_{\rm X}-L_{\rm radio}$ 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). Comment: 16 pages, 6 figures, 1 table, MNRAS in press |
| Databáze: | OpenAIRE |
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