GMRT Observations of Microquasar V4641 Sgr

Details GMRT Observations of Microquasar V4641 Sgr GMRT Observations of Microquasar V4641 Sgr

2005-12-05

arxiv.org/abs/astro-ph/0512087v1

ChJAA, Vol. 5(2005), Suppl., 269-272

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures

Scientific paper

We report the GMRT observations of V4641 Sgr during the May 2002 outburst at radio frequencies of 610 and 244 MHz. This is the lowest frequency radio detection of this source. The present low frequency radio observations clearly showed spectral evolution from the optically thick to thin state. This behavior is broadly consistent with the expanding bubble model. However, the flux densities observed at lower frequencies are much higher than predicted by this model. In the conical jet model, this discrepancy could be reconciled.

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