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Subarcsecond international LOFAR radio images of the M82 nucleus at 118 MHz and 154 MHz
E. Varenius, J. E. Conway, I. Martí-Vidal +25
The nuclear starburst in the nearby galaxy M82 provides an excellent laboratory for understanding the physics of star formation. This galaxy has been extensively observed in the pa…
The LOFAR long baseline snapshot calibrator survey
J. Moldón, A. T. Deller, O. Wucknitz +82
Aims. An efficient means of locating calibrator sources for International LOFAR is developed and used to determine the average density of usable calibrator sources on the sky for s…
Discovery of Carbon Radio Recombination Lines in M82
Leah K. Morabito, J. B. R. Oonk, Francisco Salgado +30
Carbon radio recombination lines (RRLs) at low frequencies (<=500 MHz) trace the cold, diffuse phase of the interstellar medium, which is otherwise difficult to observe. We present…
Exact Bound-Bound Gaunt Factor Values for Quantum Levels up to n=2000
Leah K. Morabito, Gerard van Harten, Francisco Salgado +3
Comparison of observations of radio recombination lines in the interstellar medium with theoretical models can be used to constrain electron temperature and density of the gas. An…
Discovery of Carbon Radio Recombination Lines in absorption towards Cygnus~A
J. B. R. Oonk, R. J. van Weeren, F. Salgado +100
We present the first detection of carbon radio recombination line absorption along the line of sight to Cygnus A. The observations were carried out with the LOw Frequency ARray in…