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Broadband radio spectrum of SS433.
- Source :
-
Bulletin of the Astronomical Society of India . Mar2006, Vol. 34 Issue 1, p1-9. 9p. - Publication Year :
- 2006
-
Abstract
- We obtained a broadband radio spectrum of the galactic compact object SS433 through the multi-wavelength campaign using the Giant Meter Radio Telescope (GMRT) and the Effelsberg 100-m Radio Telescope. The observations took place from 2005 January 03 to 2005 February 08 using eight different frequencies. We observed a flare which appeared to have started prior to January 18 and lasted till February 08. The light curves show a progressively larger time-delay as the radio frequency goes down. The peak of the 6 cm lightcurve is delayed by ∼ 3 days with respect to the peak of the 9 mm lightcurve. There is an indication of the flattening of the spectrum and possibly a turnover at ∼ 1.5 GHz. If we interpret this to be due to synchrotron self-absorption, the required magnetic field would become too large, however, free-free absorption by hot thermal surrounding medium formed due to stellar winds is still a possibility. All sky monitor (ASM) aboard Rossi X-ray Timing Experiment (RXTE) showed very high X-ray count on 2005 January 25 when the flare was well underway. This may be due to slamming of the radio 'bullets' with previously ejected, relatively slowly moving material. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03049523
- Volume :
- 34
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Bulletin of the Astronomical Society of India
- Publication Type :
- Academic Journal
- Accession number :
- 20983185