Observaciones interferométricas del RSN W44 en bajas frecuencias

CASTELLETTI G., DUBNER G.; BROGAN C.; KASSIM N. E.

La Plata, Buenos Aires, Argentina, 16 al 19 de septiembre

Congreso; 46a Reunión Anual de la Asociación Argentina de Astronomía; 2003

Low frequencies observations in radio wavelengths are very useful to trace the energy distribution of relativistic electrons emitting synchrotron radiation and can be used to anchor the low frequency end of the intrinsic radio spectra. Furthermore, detailed low frequencies measurements can help to distinguish between thermal and nonthermal components in complex regions and thus delineate the distribution of ionized gas in the interstellar medium (ISM). In this work we discuss different aspects of the data reduction procedures at very low frequencies based on new radio observations of the supernova remnant (SNR) W44 carried out at 74 MHz and 330 MHz using the A, B, C, and D configurations of the radio interferometer Very Large Array (VLA, USA).