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VLBI observations of SN 2011dh: imaging of the youngest radio supernova

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: I. Marti-Vidal, V. Tudose, Z. Paragi, J. Yang, J. M. Marcaide, J. C. Guirado, E. Ros, A. Alberdi, M. A. Perez-Torres, M. K. Argo, A. J. van der Horst, M. A. Garrett, C. J. Stockdale, K. W. Weiler

Editorial: Astronomy & Astrophysics, 535, p.L10, 2011.


We report on the VLBI detection of supernova SN 2011dh at 22 GHz using a subset of the EVN array. The observations took place 14 days after the discovery of the supernova, thus resulting in a VLBI image of the youngest radio-loud supernova ever. We provide revised coordinates for the supernova with milli-arcsecond precision, linked to the ICRF. The recovered flux density is a factor ~2 below the EVLA flux density reported by other authors at the same frequency and epoch of our observations. This discrepancy could be due to extended emission detected with the EVLA or to calibration problems in the VLBI and/or EVLA observations.

Cuvinte cheie: ISM: supernova remnants, radio continuum: general, supernovae: general, supernovae: individual: SN 2011dh, radiation mechanisms: non-thermal